INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

OCTOBER 2002

IDT5T9070

PRELIMINARY

INDUSTRIAL TEMPERATURE RANGE

2.5V SINGLE DATA RATE

1:10 CLOCK BUFFER
TERABUFFERTM JR.

DESCRIPTION:

The IDT5T9070 2.5V single data rate (SDR) clock buffer is a single-ended

input to ten single-ended outputs buffer built on advanced metal CMOS
technology. The SDR clock buffer fanout from a single input to ten single-ended
outputs reduces the loading on the preceding driver and provides an efficient
clock distribution network.

The IDT5T9070 has two output banks that can be asynchronously enabled/

disabled. Multiple power and grounds reduce noise.

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

DSC-5960/17

FEATURES:

· Optimized for 2.5V LVTTL
· Guaranteed Low Skew < 25ps (max)
· Very low duty cycle distortion < 300ps (max)
· High speed propagation delay < 2ns. (max)
· Up to 200MHz operation
· Very low CMOS power levels
· Hot insertable and over-voltage tolerant inputs
· 1:10 fanout buffer
· 2.5V V

· Available in TSSOP package

FUNCTIONAL BLOCK DIAGRAM

APPLICATIONS:

· Clock and signal distribution

G L

G 1

G 2

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

O U T P U T

C O N T R O L

1 0

INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

TSSOP

TOP VIEW

PIN CONFIGURATION

GN D

G ND

GN D

G ND

GN D

G ND

GN D

G ND

GN D

G ND

GN D

Symbol

Description

Max

Unit

Power Supply Voltage

0.5 to +3.6

Input Voltage

0.5 to +3.6

Output Voltage

0.5 to V

+0.5

STG

Storage Temperature

65 to +165

°C

Junction Temperature

150

°C

ABSOLUTE MAXIMUM RATINGS

(1)

NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause

permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.

Symbol

Parameter

Min

Typ.

Max.

Unit

Input Capacitance

CAPACITANCE

(1)

= +25°C, F = 1.0MHz)

NOTE:
1. This parameter is measured at characterization but not tested.

Symbol

Description

Min.

Typ.

Max.

Unit

Ambient Operating Temperature

+25

+85

°C

Internal Power Supply Voltage

2.3

2.5

2.7

RECOMMENDED OPERATING RANGE

INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

PIN DESCRIPTION

Symbol

I/O

Type

Description

LVTTL

Clock input

LVTTL

Gate for outputs Q

through Q

. When G1 is LOW, these outputs are enabled. When G1 is HIGH, these outputs are asynchro-

nously disabled to the level designated by GL

(1)

LVTTL

Gate for outputs Q

through Q

. When G2 is LOW, these outputs are enabled. When G2 is HIGH, these outputs are asynchro-

nously disabled to the level designated by GL

(1)

LVTTL

Specifies output disable level. If HIGH, the outputs disable HIGH. If LOW, the outputs disable LOW.

LVTTL

Clock outputs

PWR

Power supply for the device core, inputs, and outputs

GND

PWR

Power supply return for power

NOTE:
1. Because the gate controls are asynchronous, runt pulses are possible. It is the user's responsibility to either time the gate control signals to minimize the possibility of runt

pulses or be able to tolerate them in down stream circuitry.

NOTES:
1. See RECOMMENDED OPERATING RANGE table.
2. Voltage required to maintain a logic HIGH.
3. Voltage required to maintain a logic LOW.
4. Typical values are at V

= 2.5V, +25°C ambient.

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

(1)

Symbol

Parameter

Test Conditions

Min.

Typ.

(4)

Max

Unit

Input HIGH Current

= 2.7V

= V

/GND

±5

µA

Input LOW Current

= 2.7V

= GND/V

±5

Clamp Diode Voltage

= 2.3V, I

= -18mA

- 0.7

- 1.2

DC Input Voltage

- 0.3

+3.6

DC Input HIGH

(2)

1.7

DC Input LOW

(3)

0.7

Output HIGH Voltage

= -12mA

- 0.4

= -100

µA

- 0.1

Output LOW Voltage

= 12mA

0.4

= 100

µA

0.1

INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

POWER SUPPLY CHARACTERISTICS

Symbol

Parameter

Test Conditions

(1)

Typ.

Max

Unit

DDQ

Quiescent V

Power Supply Current

= Max., Reference Clock = LOW

1.5

Outputs enabled, All outputs unloaded

DDD

Dynamic V

Power Supply

= Max., V

= Max., C

= 0pF

150

200

µA/MHz

Current per Output

TOT

Total Power V

Supply Current

= 2.5V., F

REFERENCE

CLOCK

= 100MHz, C

= 15pF

= 2.5V., F

REFERENCE

CLOCK

= 200MHz, C

= 15pF

100

150

INPUT AC TEST CONDITIONS

Symbol

Parameter

Value

Units

Input HIGH Voltage

Input LOW Voltage

Input Timing Measurement Reference Level

(1)

, t

Input Signal Edge Rate

(2)

V/ns

NOTES:
1. A nominal 1.25V timing measurement reference level is specified to allow constant, repeatable results in an automatic test equipment (ATE) environment.
2. The input signal edge rate of 2V/ns or greater is to be maintained in the 10% to 90% range of the input waveform.

NOTE:
1. The termination resistors are excluded from these measurements.

AC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

(4)

Symbol

Parameter

Min.

Typ.

Max

Unit

Skew Parameters

(

)

Same Device Output Pin-to-Pin Skew

(1)

(

)

Pulse Skew

(2)

300

(

)

Part-to-Part Skew

(3)

300

Propagation Delay

PLH

Propagation Delay A to Qn

PHL

Output Rise Time (20% to 80%)

350

850

Output Fall Time (20% to 80%)

350

850

Frequency Range

200

MHz

Output Gate Enable/Disable Delay

PGE

Output Gate Enable to Qn

3.5

PGD

Output Gate Enable to Qn Driven to GL Designated Level

NOTES:
1. Skew measured between all outputs under identical input and output transitions and load conditions on any one device.
2. Skew measured is the difference between propagation delay times t

PHL

and t

PLH

of any output under identical input and output transitions and load conditions on any one device.

3. Skew measured is the magnitude of the difference in propagation times between any outputs of two devices, given identical transitions and load conditions at identical V

levels

and temperature.

4. Guaranteed by design.

INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

Propagation and Skew Waveforms

NOTE: Pulse Skew is calculated using the following expression:

(

) = | t

PHL

- t

PLH

where t

PHL

and t

PLH

are measured on the controlled edges of any one output from rising and falling edges of a single pulse. Please note that the t

PHL

and t

PLH

shown are not

valid measurements for this calculation because they are not taken from the same pulse.

AC TIMING WAVEFORMS

PLH

PHL

SK(O)

1/fo

Gate Disable/Enable Runt Pulse Generation

NOTE:
As shown, it is possible to generate runt pulses on gate disable and enable of the outputs. It is the user's responsibility to time their Gx signals to avoid this problem.

PLH

O H

O L

PG D

PG E

INDUSTRIAL TEMPERATURE RANGE

IDT5T9070
2.5V SINGLE DATA RATE 1:10 CLOCK BUFFER TERABUFFER JR.

ORDERING INFORMATION

IDT

XXXXX

Package

Device Type

5T9070

2.5V Single Data Rate 1:10 Clock Buffer
Terabuffer Jr.

Thin Shrink Small Outline Package

Process

-40°C to +85°C (Industrial)

CORPORATE HEADQUARTERS

for SALES:

for Tech Support:

2975 Stender Way

800-345-7015 or 408-727-6116

logichelp@idt.com

Santa Clara, CA 95054

fax: 408-492-8674

(408) 654-6459

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