Three-PLL Serial-Programmable

Flash-Programmable Clock Generator

CY22393
CY22394
CY22395

Cypress Semiconductor Corporation

3901 North First Street

San Jose

CA 95134

408-943-2600

Document #: 38-07186 Rev. *B

Revised June 23, 2004

Features

· Three integrated phase-locked loops (PLLs)
· Ultra-wide divide counters (8-bit Q, 11-bit P, and 7-bit

post divide)

· Improved linear crystal load capacitors
· Flash programmability with external programmer
· Field-programmable
· Low-jitter, high-accuracy outputs
· Power-management options (Shutdown, OE, Suspend)
· Configurable crystal drive strength
· Frequency select via three external LVTTL inputs
· 3.3V operation
· 16-pin TSSOP package
· CyClocksRTTM support

Advanced Features

· Serial-programmable
· Configurable output buffer
· Digital VCXO
· High-frequency LVPECL output (CY22394 only)
· 3.3/2.5V outputs (CY22395 only)

Benefits

· Generates up to three unique frequencies on up to six

outputs from an external source.

· Allows for 0-ppm frequency generation and frequency

conversion in the most demanding applications.

· Improves frequency accuracy over temperature, age,

process, and initial ppm offset.

· Non-volatile programming enables easy customization,

ultra-fast turnaround, performance tweaking, design timing

margin testing, inventory control, lower part count, and more

secure product supply. In addition, any part in the family can

be programmed multiple times, which reduces

programming errors and provides an easy upgrade path for

existing designs.

· In-house programming of samples and prototype quantities

are available using the CY3672 FTG Development Kit.

Production quantities are available through Cypress

Semiconductor's value-added distribution partners or by

using third-party programmers from BP Microsystems, HiLo

Systems, and others.

· Performance suitable for high-end multimedia, communica-

tions, industrial, A/D converters, and consumer applica-

tions.

· Supports numerous low-power application schemes and

reduces electromagnetic interference (EMI) by allowing

unused outputs to be turned off.

· Adjust crystal drive strength for compatibility with virtually

all crystals.

· 3-bit external frequency select options for PLL1, CLKA, and

CLKB.

· Industry-standard supply voltage.
· Industry-standard packaging saves on board space.
· Easy to use software support for design entry.
· Allows in-system programming into volatile configuration

memory. All frequency settings can be changed providing

literally millions of frequency options.

· Adjust output buffer strength to lower EMI or improve timing

margin.

· Fine tune crystal oscillator frequency by changing load

capacitance.

· Differential output up to 400 MHz.
· Provides interfacing option for low-voltage parts.

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 2 of 19

Selector Guide

Part Number

Outputs

Input Frequency Range

Output Frequency Range

Specifics

CY22393FC

6 CMOS

8 MHz30 MHz (external crystal)

1 MHz166 MHz (reference clock)

Up to 200 MHz

Commercial Temperature

CY22393FI

6 CMOS

8 MHz30 MHz (external crystal)

1 MHz150 MHz (reference clock)

Up to 166 MHz

Industrial Temperature

CY22394FC

1 PECL/

4 CMOS

8 MHz30 MHz (external crystal)

1 MHz166 MHz (reference clock)

100 MHz400 MHz (PECL)

Up to 200 MHz (CMOS)

Commercial Temperature

CY22394FI

1 PECL/

4 CMOS

8 MHz30 MHz (external crystal)

1 MHz150 MHz (reference clock)

125 MHz375 MHz (PECL)

Up to 166 MHz (CMOS)

Industrial Temperature

CY22395FC

4 LVCMOS/

1 CMOS

8 MHz30 MHz (external crystal)

1 MHz166 MHz (reference clock)

Up to 200 MHz (3.3V)

Up to 133 MHz (2.5V)

Commercial Temperature

CY22395FI

4 LVCMOS/

1 CMOS

8 MHz30 MHz (external crystal)

1 MHz150 MHz (reference clock)

Up to 166 MHz (3.3V)

Up to 133 MHz (2.5V)

Industrial Temperature

Logic Block Diagram -- CY22393

XTALIN

XTALOUT

S2/SUSPEND

SDAT

SCLK

SHUTDOWN/OE

CONFIGURATION

FLASH

OSC.

XBUF

PLL1

CLKE

11-Bit P

8-Bit Q

PLL2

11-Bit P

8-Bit Q

PLL3

11-Bit P

8-Bit Q

4x4

Switch

Crosspoint

Divider

/2, /3, or /4

Divider

7-Bit

Divider

7-Bit

Divider

7-Bit

Divider

7-Bit

CLKA

CLKB

CLKC

CLKD

Logic Block Diagram -- CY22394

XTALIN

XTALOUT

S2/SUSPEND

SDAT

SCLK

SHUTDOWN/OE

CONFIGURATION

FLASH

OSC.

XBUF

PLL1

P+CLK

11-Bit P

8-Bit Q

PLL2

11-Bit P

8-Bit Q

PLL3

11-Bit P

8-Bit Q

4x4

Switch

Crosspoint

Divider

7-Bit

Divider

7-Bit

Divider

7-Bit

PECL

OUTPUT

CLKA

CLKB

CLKC

P-CLK

0º

180º

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 3 of 19

Logic Block Diagram -- CY22395

XTALIN

XTALOUT

S2/SUSPEND

SDAT

SCLK

SHUTDOWN/OE

CONFIGURATION

FLASH

OSC.

PLL1

LCLKE

11-Bit P

8-Bit Q

PLL2

11-Bit P

8-Bit Q

PLL3

11-Bit P

8-Bit Q

4x4

Switch

Crosspoint

Divider

7-Bit

Divider

7-Bit

Divider

7-Bit

Divider

7-Bit

Divider

/2, /3, or /4

LCLKA

LCLKB

CLKC

LCLKD

LCLKA, LCLKB, LCLKD, LCLKE referenced to LVDD

Pin Configurations

1
2
3
4
5
6

7
8

CLKC

AGND

XTALIN

XTALOUT

XBUF

CLKD

CLKE

SHUTDOWN/OE
S2/SUSPEND

SCLK (S1)
SDAT (S0)
GND

CLKA
CLKB

16-pin TSSOP

CY22393

2
3
4
5
6

7
8

CLKC

AGND

XTALIN

XTALOUT

XBUF

PCLK

P+ CLK

SHUTDOWN/OE
S2/SUSPEND

SCLK (S1)
SDAT (S0)
GND

CLKA
CLKB

16-pin TSSOP

CY22394

1
2
3
4
5
6

7
8

CLKC

AGND

XTALIN

XTALOUT

LCLKD
LCLKE

SHUTDOWN/OE
S2/SUSPEND

SCLK (S1)
SDAT (S0)
GND/LGND

LCLKA
LCLKB

16-pin TSSOP

CY22395

Pin Definitions

Name

Pin Number

CY22393

Pin Number

CY22394

Pin Number

CY22395

Description

CLKC

Configurable clock output C

Power supply

AGND

Analog Ground

XTALIN

Reference crystal input or external reference clock input

XTALOUT

Reference crystal feedback

XBUF

N/A

Buffered reference clock output

N/A

Low Voltage Clock Output Power Supply

CLKD or LCLKD

N/A

Configurable clock output D; LCLKD referenced to LVDD

PCLK

N/A

LV PECL Output

[1]

CLKE or LCLKE

N/A

Configurable clock output E; LCLKE referenced to LVDD

P+ CLK

N/A

LV PECL Output

[1]

CLKB or LCLKB

Configurable clock output B; LCLKB referenced to LVDD

Note:

1. LVPECL outputs require an external termination network.

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 4 of 19

Operation

The CY22393, CY22394, and CY22395 are a family of parts

designed as upgrades to the existing CY22392 device. These

parts have similar performance to the CY22392, but provide

advanced features to meet the needs of more demanding

applications.
The clock family has three PLLs which, when combined with

the reference, allow up to four independent frequencies to be

output on up to six pins. These three PLLs are completely

programmable.

Configurable PLLs
PLL1 generates a frequency that is equal to the reference

divided by an 8-bit divider (Q) and multiplied by an 11-bit

divider in the PLL feedback loop (P). The output of PLL1 is sent

to two locations: the cross point switch and the PECL output

(CY22394). The output of PLL1 is also sent to a /2, /3, or /4

synchronous post-divider that is output through CLKE. The

frequency of PLL1 can be changed via serial programming or

by external CMOS inputs, S0, S1, and S2. See the following

section on general-purpose Inputs for more detail.
PLL2 generates a frequency that is equal to the reference

divided by an 8-bit divider (Q) and multiplied by an 11-bit

divider in the PLL feedback loop (P). The output of PLL2 is sent

to the cross point switch. The frequency of PLL2 can be

changed via serial programming.
PLL3 generates a frequency that is equal to the reference

divided by an 8-bit divider (Q) and multiplied by an 11-bit

divider in the PLL feedback loop (P). The output of PLL3 is sent

to the cross point switch. The frequency of PLL3 can be

changed via serial programming.

General-Purpose Inputs
S2 is a general-purpose input that can be programmed to

allow for two different frequency settings. Options that may be

switched with this general-purpose input are as follows: the

frequency of PLL1, the output divider of CLKB, and the output

divider of CLKA.
The two frequency settings are contained within an eight-row

frequency table. The values of SCLK (S1) and SDAT (S0) pins

are latched during start-up and used as the other two indexes

into this array.

CLKA and CLKB both have 7-bit dividers that point to one of

two programmable settings (register 0 and register 1). Both

clocks share a single register control, so both must be set to

S2 (0,0,0 to 1,1,1) to control eight different values of P and Q

on PLL1. For each PLL1 P and Q setting, one of the two CLKA

and CLKB divider registers can be chosen. Any divider change

as a result of switching S0, S1, or S2 is guaranteed to be glitch

free.

Crystal Input
The input crystal oscillator is an important feature of this family

of parts because of its flexibility and performance features.
The oscillator inverter has programmable drive strength. This

allows for maximum compatibility with crystals from various

manufacturers, process, performance, and quality.
The input load capacitors are placed on-die to reduce external

component cost. These capacitors are true parallel-plate

capacitors for ultra-linear performance. These were chosen to

reduce the frequency shift that occurs when non-linear load

capacitance interacts with load, bias, supply, and temperature

changes. Non-linear (FET gate) crystal load capacitors should

not be used for MPEG, POTS dial tone, communications, or

other applications that are sensitive to absolute frequency

requirements.
The value of the load capacitors is determined by six bits in a

programmable register. The load capacitance can be set with

a resolution of 0.375 pF for a total crystal load range of 6 pF

to 30 pF.
For driven clock inputs the input load capacitors may be

completely bypassed. This enables the clock chip to accept

driven frequency inputs up to 166 MHz. If the application

requires a driven input, then XTALOUT must be left floating.

Digital VCXO
The serial programming interface may be used to dynamically

change the capacitor load value on the crystal. A change in

crystal load capacitance corresponds with a change in the

reference frequency.
For special pullable crystals specified by Cypress, the capac-

itance pull range is +150 ppm to 150 ppm from midrange.

CLKA or LCLKA

Configurable clock output A; LCLKA referenced to LVDD

GND/LGND

Ground

SDAT (S0)

Two Wire Serial Port Data. S0 value latched during start-up

SCLK (S1)

Two Wire Serial Port Clock. S1 value latched during start-up

Analog Power Supply

S2/

SUSPEND

General Purpose Input for Frequency Control; bit 2. Optionally

Suspend mode control input

SHUTDOWN/

Places outputs in three-state condition and shuts down chip

when LOW. Optionally, only places outputs in three-state

condition and does not shut down chip when LOW

Pin Definitions

(continued)

Name

Pin Number

CY22393

Pin Number

CY22394

Pin Number

CY22395

Description

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 5 of 19

Be aware that adjusting the frequency of the reference will

affect all frequencies on all PLLs in a similar manner since all

frequencies are derived from the single reference.

Output Configuration
Under normal operation there are four internal frequency

sources that may be routed via a programmable cross point

switch to any of the four programmable 7-bit output dividers.

The four sources are: reference, PLL1, PLL2, and PLL3. The

following is a description of each output.
CLKA's output originates from the cross point switch and goes

through a programmable 7-bit post divider. The 7-bit post

divider derives its value from one of two programmable

registers. See the section on General-Purpose Inputs for more

information.
CLKB's output originates from the cross point switch and goes

through a programmable 7-bit post divider. The 7-bit post

divider derives its value from one of two programmable

registers. See the section on General-Purpose Inputs for more

information.
CLKC's output originates from the cross point switch and goes

through a programmable 7-bit post divider. The 7-bit post

divider derives its value from one programmable register.
CLKD's output originates from the cross point switch and goes

through a programmable 7-bit post divider. The 7-bit post

divider derives its value from one programmable register. For

the CY22394, CLKD is brought out as the complimentary

version of a LV PECL Clock referenced to CLKE, bypassing

both the cross point switch and 7-bit post divider.
CLKE's output originates from PLL1 and goes through a post

divider that may be programmed to /2, /3, or /4. For the

CY22394, CLKE is brought out as an LV PECL Clock,

bypassing the post divider.
XBUF is simply the buffered reference.
The Clock outputs have been designed to drive a single point

load with a total lumped load capacitance of 15 pF. While

driving multiple loads is possible with the proper termination it

is generally not recommended.

Power-Saving Features
The SHUTDOWN/OE input three-states the outputs when

pulled LOW. If system shutdown is enabled, a LOW on this pin

also shuts off the PLLs, counters, reference oscillator, and all

other active components. The resulting current on the V

pins will be less than 5 mA (typical). After leaving shutdown

mode, the PLLs will have to relock.
The S2/SUSPEND input can be configured to shut down a

customizable set of outputs and/or PLLs, when LOW. All PLLs

and any of the outputs can be shut off in nearly any combi-

nation. The only limitation is that if a PLL is shut off, all outputs

derived from it must also be shut off. Suspending a PLL shuts

off all associated logic, while suspending an output simply

forces a three-state condition.
With the serial interface, each PLL and/or output can be

individually disabled. This provides total control over the power

savings.

Improving Jitter
Jitter Optimization Control is useful in mitigating problems

related to similar clocks switching at the same moment,

causing excess jitter. If one PLL is driving more than one

output, the negative phase of the PLL can be selected for one

of the outputs (CLKACLKD). This prevents the output edges

from aligning, allowing superior jitter performance.

Power Supply Sequencing
For parts with multiple V

pins, there are no power supply

sequencing requirements. The part will not be fully operational

until all V

pins have been brought up to the voltages

specified in the "Operating Conditions" table.
All grounds should be connected to the same ground plane.

CyClocksRT Software

CyClocksRT is our second-generation software application

that allows users to configure this family of devices. The

easy-to-use interface offers complete control of the many

features of this family including, but not limited to, input

frequency, PLL and output frequencies, and different

functional options. Data sheet frequency range limitations are

checked and performance tuning is automatically applied.

CyClocksRT also has a power estimation feature that allows

the user to see the power consumption of a specific configu-

ration. You can download a free copy of CyberClocks that

includes CyClocksRT for free on Cypress's web site at

www.cypress.com
CyClocksRT is used to generate P, Q, and divider values used

in serial programming. There are many internal frequency

rules which are not documented in this data sheet, but are

required for proper operation of the device. These rules can

be checked by using the latest version of CyClocksRT.

Junction Temperature Limitations
It is possible to program this family such that the maximum

Junction Temperature rating is exceeded. The package q

115 °C/W. Use the CyClocksRT power estimation feature to

verify that the programmed configuration meets the Junction

Temperature and Package Power Dissipation maximum

ratings.

Dynamic Updates
The output divider registers are not synchronized with the

output clocks. Changing the divider value of an active output

will likely cause a glitch on that output.
PLL P and Q data is spread between three bytes. Each byte

becomes active on the acknowledge for that byte, so changing

P and Q data for an active PLL will likely cause the PLL try to

lock on an out-of-bounds condition. For this reason, it is

recommended that the PLL being programmed be turned off

during the update. This can be done by setting the PLL*_En

bit LOW.
PLL1, CLKA, and CLKB each have multiple registers

supplying data. Programming these resources can be accom-

plished safely by always programming an inactive register,

and then transitioning to that register. This allows these

resources to stay on during programming.
The serial interface is active even with the SHUTDOWN/OE

pin LOW as the serial interface logic uses static components

and is completely self-timed. The part will not meet the I

DDS

current limit with transitioning inputs.

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 6 of 19

Memory Bitmap Definitions

Clk{AD}_Div[6:0]
Each of the four main output clocks (CLKACLKD) features a

7-bit linear output divider. Any divider setting may be used

between 1 and 127 by programming the value of the desired

divider into this register. Odd divide values are automatically

duty-cycle corrected. Setting a divide value of zero powers

down the divider and forces the output to a three-state

condition.
CLKA and CLKB have two divider registers, selected by the

DivSel bit (which in turn is selected by S2, S1, and S0). This

allows dynamic changing of the output divider value. For the

CY22394 device, ClkD_Div = 000001.

ClkE_Div[1:0]
CLKE has a simpler divider.

For the CY22394, set

ClkE_Div = 01.

Clk*_FS[2:0]
Each of the four main output clocks (CLKACLKD) has a

three-bit code that determines the clock sources for the output

divider. The available clock sources are: Reference, PLL1,

PLL2, and PLL3. Each PLL provides both positive and

negative phased outputs, for a total of seven clock sources.

Note that the phase is a relative measure of the PLL output

phases. No absolute phase relation exists at the outputs.

Xbuf_OE
This bit enables the XBUF output when HIGH. For the

CY22395, Xbuf_OE = 0.

PdnEn
This bit selects the function of the SHUTDOWN/OE pin. When

this bit is HIGH, the pin is an active LOW shutdown control.

When this bit is LOW, this pin is an active HIGH output enable

control.

Clk*_ACAdj[1:0]
These bits modify the output predrivers, changing the duty

cycle through the pads. These are nominally set to 01, with a

higher value shifting the duty cycle higher. The performance of

the nominal setting is guaranteed.

Clk*_DCAdj[1:0]
These bits modify the DC drive of the outputs. The perfor-

mance of the nominal setting is guaranteed.

PLL*_Q[7:0]

PLL*_P[9:0]

PLL*_P0
These are the 8-bit Q value and 11-bit P values that determine

the PLL frequency. The formula is:

PLL*_LF[2:0]
These bits adjust the loop filter to optimize the stability of the

PLL. The following table can be used to guarantee stability.

However, CyClocksRT uses a more complicated algorithm to

set the loop filter for enhanced jitter performance. It is recom-

mended to use the Print Preview function in CyClocksRT to

determine the charge pump settings for optimal jitter perfor-

mance.

PLL*_En
This bit enables the PLL when HIGH. If PLL2 or PLL3 are not

enabled, then any output selecting the disabled PLL must

have a divider setting of zero (off). Since the PLL1_En bit is

dynamic, internal logic automatically turns off dependent

outputs when PLL1_En goes LOW.

DivSel
This bit controls which register is used for the CLKA and CLKB

dividers.

ClkE_Div[1:0]

ClkE Output

Off

PLL1 0

° Phase/4

PLL1 0

° Phase/2

PLL1 0

° Phase/3

Clk*_FS[2:0]

Clock Source

000

Reference Clock

001

Reserved

010

PLL1 0

° Phase

011

PLL1 180

° Phase

100

PLL2 0

° Phase

101

PLL2 180

° Phase

110

PLL3 0

° Phase

111

PLL3 180

° Phase

Clk*_DCAdj[1:0]

Output Drive Strength

30% of nominal

Nominal

+15% of nominal

+50% of nominal

PLL*_LF[2:0]

Min

Max

000

231

001

232

626

010

627

834

011

835

1043

100

1044

1600

PLL

REF

-------

P 3

(

)

(

) PO

Q 2

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 7 of 19

OscCap[5:0]
This controls the internal capacitive load of the oscillator. The

approximate effective crystal load capacitance is:

Set to zero for external reference clock.

OscDrv[1:0]
These bits control the crystal oscillator gain setting. These

should always be set according to the following table. The

parameters are the Crystal Frequency, Internal Crystal

Parasitic Resistance (available from the manufacturer), and

the OscCap setting during crystal start-up (which occurs when

power is applied, or after shutdown is released). If in doubt,

use the next higher setting.

For external reference, the following table must be used.

Reserved
These bits must be programmed LOW for proper operation of

the device.

Serial Programming Bitmaps -- Summary Tables

LOAD

6pF

OscCap 0.375pF

(

)

OscCap

00H20H

20H30H

30H40H

Crystal Freq\ R 30

815 MHz

1520 MHz

2025 MHz

2530 MHz

External Freq (MHz)

125

2550

5090

90166

OscDrv[1:0]

Addr DivSel

08H

ClkA_FS[0]

ClkA_Div[6:0]

09H

ClkA_FS[0]

ClkA_Div[6:0]

0AH

ClkB_FS[0]

ClkB_Div[6:0]

0BH

ClkB_FS[0]

ClkB_Div[6:0]

0CH

ClkC_FS[0]

ClkC_Div[6:0]

0DH

ClkD_FS[0]

ClkD_Div[6:0]

0EH

ClkD_FS[2:1]

ClkC_FS[2:1]

ClkB_FS[2:1]

ClkA_FS[2:1]

0FH

Clk{C,X}_ACAdj[1:0]

Clk{A,B,D,E}_ACAdj[1:0]

PdnEn

Xbuf_OE

ClkE_Div[1:0]

10H

ClkX_DCAdj[1]

Clk{D,E}_DCAdj[1]

ClkC_DCAdj[1]

Clk{A,B}_DCAdj[1]

11H

PLL2_Q[7:0]

12H

PLL2_P[7:0]

13H

Reserved

PLL2_En

PLL2_LF[2:0]

PLL2_PO

PLL2_P[9:8]

14H

PLL3_Q[7:0]

15H

PLL3_P[7:0]

16H

Reserved

PLL3_En

PLL3_LF[2:0]

PLL3_PO

PLL3_P[9:8]

17H

Osc_Cap[5:0]

Osc_Drv[1:0]

Addr

(1,0)

40H

000

PLL1_Q[7:0]

41H

PLL1_P[7:0]

42H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

43H

001

PLL1_Q[7:0]

44H

PLL1_P[7:0]

45H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

46H

010

PLL1_Q[7:0]

47H

PLL1_P[7:0]

48H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

49H

011

PLL1_Q[7:0]

4AH

PLL1_P[7:0]

4BH

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 8 of 19

Serial Programming Interface (SPI) Protocol

and Timing

The CY22393,CY22394 and CY22395 utilizes a 2-serial-wire

interface SDAT and SCLK that operates up to 400 kbits/sec in

Read or Write mode. The basic Write serial format is as

follows:
Start Bit; 7-bit Device Address (DA); R/W Bit; Slave Clock

Acknowledge (ACK); 8-bit Memory Address (MA); ACK; 8-bit

Data; ACK; 8-bit Data in MA+1 if desired; ACK; 8-bit Data in

MA+2; ACK; etc. until STOP Bit. The basic serial format is

illustrated in Figure 2.

Default Startup Condition for the CY22393/94/95
The default (programmed) condition of each device is

generally set by the distributor, who will program the device

using a customer-specified JEDEC file produced by

CyClocksRT, Cypress's proprietary development software.

Parts shipped by the factory are blank and unprogrammed. In

this condition, all bits are set to 0, all outputs are three-stated,

and the crystal oscillator circuit is active.
While users can develop their own subroutine to program any

or all of the individual registers as described in the following

pages, it may be easier to simply use CyClocksRT to produce

the required register setting file.

Device Address
The device address is a 7-bit value that is configured during

Field Programming. By programming different device

addresses, two or more parts can be connected to the serial

interface and be independently controlled. The device address

is combined with a read/write bit as the LSB and is sent after

each start bit.
The default serial interface address is 69H, but should there

be a conflict with any other devices in your system, this can

also be changed using CyClocksRT.

Data Valid
Data is valid when the clock is HIGH, and may only be transi-

tioned when the clock is LOW as illustrated in Figure 3.

Data Frame
Every new data frame is indicated by a start and stop

sequence, as illustrated in Figure 4.
Start Sequence - Start Frame is indicated by SDAT going LOW

when SCLK is HIGH. Every time a start signal is given, the next

8-bit data must be the device address (seven bits) and a R/W

bit, followed by register address (eight bits) and register data

(eight bits).
Stop Sequence - Stop Frame is indicated by SDAT going HIGH

when SCLK is HIGH. A Stop Frame frees the bus for writing to

another part on the same bus or writing to another random

Acknowledge Pulse
During Write Mode the CY22393,CY22394 and CY22395 will

respond with an Acknowledge pulse after every eight bits. This

is accomplished by pulling the SDAT line LOW during the N*9

clock cycle as illustrated in Figure 5. (N = the number of bytes

transmitted). During Read Mode the acknowledge pulse after

the data packet is sent is generated by the master.

Write Operations

Writing Individual Bytes
A valid write operation must have a full 8-bit register address

after the device address word from the master, which is

followed by an acknowledge bit from the slave (ack = 0/LOW).

The next eight bits must contain the data word intended for

storage. After the data word is received, the slave responds

with another acknowledge bit (ack = 0/LOW), and the master

must end the write sequence with a STOP condition.

Writing Multiple Bytes
In order to write more than one byte at a time, the master does

not end the write sequence with a stop condition. Instead, the

master can send multiple contiguous bytes of data to be

stored. After each byte, the slave responds with an

acknowledge bit, just like after the first byte, and will accept

data until the acknowledge bit is responded to by the STOP

condition. When receiving multiple bytes, the CY22393,

CY22394, and CY22395 internally increments the register

address.

4CH

100

PLL1_Q[7:0]

4DH

PLL1_P[7:0]

4EH

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

4FH

101

PLL1_Q[7:0]

50H

PLL1_P[7:0]

51H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

52H

110

PLL1_Q[7:0]

53H

PLL1_P[7:0]

54H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

55H

111

PLL1_Q[7:0]

56H

PLL1_P[7:0]

57H

DivSel

PLL1_En

PLL1_LF[2:0]

PLL1_PO

PLL1_P[9:8]

Addr

(1,0)

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 9 of 19

Read Operations

Read operations are initiated the same way as Write opera-

tions except that the R/W bit of the slave address is set to `1'

(HIGH). There are three basic read operations: current

address read, random read, and sequential read.

Current Address Read
The CY22393,CY22394 and CY22395 has an onboard

address counter that retains 1 more than the address of the

last word access. If the last word written or read was word `n',

then a current address read operation would return the value

stored in location `n+1'. When the CY22393,CY22394 and

CY22395 receives the slave address with the R/W bit set to a

`1', the CY22393,CY22394 and CY22395 issues an

acknowledge and transmits the 8-bit word. The master device

does not acknowledge the transfer, but does generate a STOP

condition, which causes the CY22393,CY22394 and CY22395

to stop transmission.

Random Read
Through random read operations, the master may access any

memory location. To perform this type of read operation, first

the word address must be set. This is accomplished by

sending the address to the CY22393,CY22394 and CY22395

as part of a write operation. After the word address is sent, the

master generates a START condition following the

acknowledge. This terminates the write operation before any

data is stored in the address, but not before the internal

address pointer is set. Next the master reissues the control

byte with the R/W byte set to `1'. The CY22393,CY22394 and

CY22395 then issues an acknowledge and transmits the 8-bit

word. The master device does not acknowledge the transfer,

but does generate a STOP condition which causes the

CY22393,CY22394 and CY22395 to stop transmission.

Sequential Read
Sequential read operations follow the same process as

random reads except that the master issues an acknowledge

instead of a STOP condition after transmission of the first 8-bit

data word. This action results in an incrementing of the internal

address pointer, and subsequently output of the next 8-bit data

word. By continuing to issue acknowledges instead of STOP

conditions, the master may serially read the entire contents of

the slave device memory. Note that register addresses outside

of 08H to 1BH and 40H to 57H can be read from but are not

real registers and do not contain configuration information.

When the internal address pointer points to the FFH register,

after the next increment, the pointer will point to the 00H

SCL

START
Condition

SDAT

STOP

Data may

Address or
Acknowledge
Valid

be changed

Condition

Figure 1. Data Transfer Sequence on the Serial Bus

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 10 of 19

Serial Programming Interface Timing

SDAT Write

Start Signal

Device

Address

7-bit

R/W = 0

1 Bit

8-bit

Address

Slave

1 Bit

ACK

Slave

1 Bit

ACK

8-bit

Data

Stop Signal

Multiple

Contiguous

Registers

Slave

1 Bit

ACK

8-bit

Data

(XXH)

(XXH+1)

Slave

1 Bit

ACK

8-bit

Slave

1 Bit

ACK

8-bit

Data

(FFH)

Slave

1 Bit

ACK

8-bit

Slave

1 Bit

ACK

Slave

1 Bit

ACK

SDAT Read

Start Signal

Device

Address

7-bit

R/W = 1

1 Bit

8-bit

Data

Slave

1 Bit

ACK

Slave

1 Bit

ACK

Stop Signal

SDAT Read

Start Signal

Device

Address

7-bit

R/W = 0

1 Bit

8-bit

Address

Slave

1 Bit

ACK

Slave

1 Bit

ACK

7-bit

Device

Stop Signal

Multiple

Contiguous

Registers

Master

1 Bit

ACK

8-bit

Data

Master

1 Bit

ACK

(XXH)

Master

1 Bit

ACK

8-bit

Master

1 Bit

ACK

8-bit

Data

(FFH)

Master

1 Bit

ACK

8-bit

Master

1 Bit

ACK

Master

1 Bit

ACK

Current
Address
Read

Address
+R/W=1

Repeated
Start bit

Figure 2. Data Frame Architecture

SDAT

SCLK

Data Valid

Transition

to next Bit

CLK

LOW

CLK

HIGH

VIH

VIL

Figure 3. Data Valid and Data Transition Periods

SDAT

SCLK

START

Transition

to next Bit

STOP

Figure 4. Start and Stop Frame

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 12 of 19

Maximum Ratings

(Above which the useful life may be impaired. For user guide-

lines, not tested.)
Supply Voltage ............................................... 0.5V to +7.0V
DC Input Voltage............................ 0.5V to + (AV

+ 0.5V)

Storage Temperature ..................................65°C to +125°C

Junction Temperature .................................................. 125°C
Data Retention @ Tj=125×C .................................> 10 years
Maximum Programming Cycles........................................100
Package Power Dissipation...................................... 350 mW
Static Discharge Voltage
(per MIL-STD-883, Method 3015) ........................... > 2000V
Latch up (per JEDEC 17) .................................... > ±200 mA

Operating Conditions

[2]

Parameter

Description

Part Numbers

Min.

Typ

Max.

Unit

/AV

/LV

Supply Voltage

All

3.135

3.3

3.465

2.5V Output Supply Voltage

22395

2.375

2.5

2.625

Commercial Operating Temperature, Ambient All

+70

°C

Industrial Operating Temperature, Ambient

All

+85

°C

LOAD_OUT

Max. Load Capacitance

All

REF

External Reference Crystal

All

MHz

External Reference Clock,

[3]

Commercial

All

166

MHz

External Reference Clock,

[3]

Industrial

All

150

MHz

3.3V Electrical Characteristics

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

Output High Current

[4]

= (L)V

0.5, (L)V

= 3.3V

Output Low Current

[4]

= 0.5, (L)V

= 3.3V

XTAL_MIN

Crystal Load Capacitance

[4]

Capload at minimum setting

XTAL_MAX

Crystal Load Capacitance

[3]

Capload at maximum setting

Input Pin Capacitance

[4]

Except crystal pins

HIGH-Level Input Voltage

CMOS levels,% of AV

70%

LOW-Level Input Voltage

CMOS levels,% of AV

30%

Input HIGH Current

= AV

0.3 V

µA

Input LOW Current

= +0.3 V

µA

Output Leakage Current

Three-state outputs

µA

Total Power Supply Current

3.3V Power Supply;

2 outputs @ 20 MHz; 4 outputs @ 40 MHz

3.3V Power Supply;

2 outputs @ 166 MHz; 4 outputs @ 83 MHz

100

DDS

Total Power Supply Current in

Shutdown Mode

Shutdown active

µA

2.5V Electrical Characteristics

(CY22395 only)

[5]

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

OH_2.5

Output High Current

[4]

= LV

0.5, LV

= 2.5 V

OL_2.5

Output Low Current

[4]

= 0.5, LV

= 2.5 V

Notes:

2. Unless otherwise noted, Electrical and Switching Characteristics are guaranteed across these operating conditions.
3. External input reference clock must have a duty cycle between 40% and 60%, measured at V

/2.

4. Guaranteed by design, not 100% tested.
5. V

DDL

is only specified and characterized at 3.3V ± 5% and 2.5V ± 5%. V

DDL

may be powered at any value between 3.465 and 2.375.

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 13 of 19

3.3V Switching Characteristics

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

1/t

Output Frequency

[4, 6]

Clock output limit, CMOS, Commercial

200

MHz

Clock output limit, CMOS, Industrial

166

MHz

Clock output limit, PECL, Commercial (CY22394

only)

100

400

MHz

Clock output limit, PECL, Industrial (CY22394

only)

125

375

MHz

Output Duty Cycle

[4, 7]

Duty cycle for outputs, defined as t

³ t

Fout<100 MHz, divider>=2,

measured at V

45%

50%

55%

Duty cycle for outputs, defined as t

³ t

Fout>100 MHz or divider = 1,

measured at V

40%

50%

60%

Rising Edge Slew

Rate

[4]

Output clock rise time, 20% to 80% of V

0.75

1.4

V/ns

Falling Edge Slew

Rate

[4]

Output clock fall time, 20% to 80% of V

0.75

1.4

V/ns

Output three-state

Timing

[4]

Time for output to enter or leave three-state

mode after SHUTDOWN/OE switches

150

300

Clock Jitter

[4, 8]

Peak-to-peak period jitter, CLK outputs

measured at V

400

P+/P Crossing Point

[4]

Crossing point referenced to Vdd/2, balanced

resistor network (CY22394 only)

0.2

P+/P Jitter

[4, 8]

Peak-to-peak period jitter, P+/P outputs

measured at crossing point (CY22394 only)

200

Lock Time

[4]

PLL Lock Time from Power-up

1.0

2.5V Switching Characteristics

(CY22395 only)

[5]

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

1/t

1_2.5

Output Frequency

[4, 6]

Clock output limit, LVCMOS

133

MHz

2_2.5

Output Duty Cycle

[4, 7]

Duty cycle for outputs, defined as t

÷ t

measured at LV

40%

50%

60%

3_2.5

Rising Edge Slew Rate

[4]

Output clock rise time, 20% to 80% of LV

0.5

1.0

V/ns

4_2.5

Falling Edge Slew Rate

[4]

Output clock fall time, 20% to 80% of LV

0.5

1.0

V/ns

Switching Waveforms

Notes:

6. Guaranteed to meet 20%80% output thresholds, duty cycle, and crossing point specifications.
7. Reference Output duty cycle depends on XTALIN duty cycle.
8. Jitter varies significantly with configuration. Reference Output jitter depends on XTALIN jitter and edge rate.

OUTPUT

All Outputs, Duty Cycle and Rise/Fall Time

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 15 of 19

© Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be
used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its
products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

CY22393FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22393FI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393FIT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22394ZC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394ZC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394ZI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394ZI-XXXT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22394FC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394FI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394FIT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22395ZC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395ZC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22395ZI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22395ZI-XXXT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22395FC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22395FI

16-Pin TSSOP

Industrial, 40 to 85°C

Lead Free Devices
CY22393ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393ZXC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22393ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393ZXI-XXXT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22393FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393FXCT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22393FXI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393FXIT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22394ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394ZXC-XXXT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22394ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394ZXI-XXXT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22394FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394FXCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394FXI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394FXIT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22395ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395ZXC-XXXT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22395ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22395ZXI-XXXT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22395FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395FXCT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22395FXI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22395FXIT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

Ordering Information

Ordering Code

Package Type

Product Flow

CY22393
CY22394
CY22395

Document #: 38-07186 Rev. *B

Page 17 of 19

Ordering Information

Ordering Code

Package Type

Product Flow

CY22393ZC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393ZC-XXXT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22393ZI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393ZI-XXXT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22393FC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22393FI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393FIT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22394ZC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394ZC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394ZI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394ZI-XXXT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22394FC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394FI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394FIT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22395ZC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395ZC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22395ZI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22395ZI-XXXT

16-Pin TSSOP- Tape and Reel

Industrial, 40 to 85°C

CY22395FC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395FCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22395FI

16-Pin TSSOP

Industrial, 40 to 85°C

Lead Free Devices
CY22393ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393ZXC-XXXT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22393ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393ZXI-XXXT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22393FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22393FXCT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22393FXI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22393FXIT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22394ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394ZXC-XXXT

16-Pin TSSOP - Tape and Reel

Commercial, 0 to 70°C

CY22394ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394ZXI-XXXT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22394FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22394FXCT

16-Pin TSSOP- Tape and Reel

Commercial, 0 to 70°C

CY22394FXI

16-Pin TSSOP

Industrial, 40 to 85°C

CY22394FXIT

16-Pin TSSOP - Tape and Reel

Industrial, 40 to 85°C

CY22395ZXC-XXX

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395ZXI-XXX

16-Pin TSSOP

Industrial, 40 to 85°C

CY22395FXC

16-Pin TSSOP

Commercial, 0 to 70°C

CY22395FX I

16-Pin TSSOP

Industrial, 40 to 85°C

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CY22394ZI-XXX

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CY22394ZI-XXX