W91330N SERIES

TONE/PULSE DIALER WITH HANDFREE

LOCK AND KEY TONE FUNCTIONS

Publication Release Date: May 1997

- 1 -

Revision A2

GENERAL DESCRIPTION

The W91330N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse
dialing. They feature one-key redial, handfree dialing, key tone, redial, and lock functions.

FEATURES

DTMF/pulse switchable dialer

32-digit redial memory

Pulse-to-tone (*/T) keypad for long distance call operation

Uses 5

4 keyboard

Easy operation with redial, flash, pause, and */T keypads

Pause, pulse-to-tone (*/T) can be stored as a digit in memory

0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out

Off-hook delay 300 mS in lock mode (

will keep low for 300 mS low while off hook)

First key-in delay 300 mS output in lock mode

Dialing rate (10, 20 ppS ) selected by bonding option

Minimum tone output duration: 93 msec.

Minimum intertone pause: 93 msec.

Flash break time (73, 100, 300, 600 msec.) selectable by keypad; pause time is 1.0 sec.

On-chip power-on reset

Uses 3.579545 MHz crystal or ceramic resonator

Packaged in 18 or 20-pin plastic DIP

The different dialers in the W91330N series are shown in the following table:

TYPE NO.

REPLACEMENT

TYPE NO.

PULSE

(ppS)

FLASH

(mS)

M/B

KEY

TONE

HANDFREE

DIALING

LOCK

PACKAGE

(PINS)

W91330N

W91330

600/100/300/73

Yes

W91331N

W91331

600/100/300/73

Yes

W91330AN

W91330A

600/100/300/73

Yes

W91331AN

W91331A

600/100/300/73

Yes

W91330LN

W91330L

600/100/300/73

Yes

W91330ALN

W91330AL

600/100/300/73

Yes

W91330N SERIES

- 2 -

PIN CONFIGURATIONS

T/P MUTE

HFI

HKS

DTMF

MODE

HFO

T/P MUTE

HKS

DTMF

MODE

LOCK

W91330AN/W91331AN

W91330ALN

W91330LN

W91330N/W91331N

T/P MUTE

HFI

HKS

DTMF

MODE

HFO

LOCK

T/P MUTE

HKS

DTMF

MODE

W91330N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

PIN DESCRIPTION

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

Column-

Row

Inputs

The keyboard inputs may be used with either the
standard 5

4 keyboard or the inexpensive single

contact (Form A) keyboard. Electronic input from a

C can also be used.

A valid key-in is defined as a single row being
connected to a single column.

XT, XT

7, 8

I, O

A built-in inverter provides oscillation with an
inexpensive 3.579545 MHz crystal or ceramic
resonator.

T/P

MUTE

The T/P MUTE is a conventional CMOS N-channel
open drain output.

The output transistor is switched on during dialing
sequence, one-key redial break, and flash break
time. Otherwise, it is switched off.

MODE

Pulling mode pin to V

places the dialer in tone

mode.

Pulling mode pin to V

places the dialer in pulse

mode. (10 ppS; 20 ppS for W91331N/W91331AN,
M/B = 40:60)

Floating mode pin places the dialer in pulse mode.

(10 ppS; 20 ppS for W91331N/W91331AN, M/B =
33.3:66.7).

HKS

Hook switch input.

HKS = V

: On-hook state. Chip in sleeping mode,

no operation.

HKS = V

: Off-hook state. Chip enabled for normal

operation.

HKS pin is pulled to V

by internal resistor.

N-channel open drain dialing pulse output.

Flash key will cause DP to be active in either tone
mode or pulse mode.

The timing diagram for pulse mode is shown in
Figure 1(a, b, c, d).

, V

14, 6

16, 6

Power input pins.

W91330N SERIES

- 4 -

Pin Description, continued

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

DTMF

In pulse mode, this pin remains in low state at all
times. In tone mode, it will output a dual or single
tone. Detailed timing diagram for tone mode is
shown in Figure 2(a, b, c, d).

Specified

Actual

Error %

Output Frequency

697

770

852

941

1209

1336

1477

699

766

848

948

1216

1332

1472

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

HFI, HFO

10, 11

I, O

Handfree control pins. The handfree control state is

toggled on by a low pulse on the HFI input pin. The
status of the handfree control state is described in
the following table:

CURRENT STATE

Input

HFO Dialing

High

Yes

On Hook

High

Low

Off Hook

High

Low

Yes

On Hook

Off Hook

Low

Yes

Off Hook

Low

On Hook

Low

Off Hook

High

On Hook

High

Yes

Low

Hook SW.

HFO

NEXT STATE

HFI

HFI pin is pulled to V

by internal resistor.

Detailed timing diagrams are shown in Figure 3.

(except

W91330LN)

(except

W91330ALN)

Key-tone signal output. The key tone is generated
for all valid keys. Frequency is 600 Hz and duration
is 35 mS.

W91330N SERIES

Publication Release Date: May 1997

- 5 -

Revision A2

Pin Description, continued

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

LOCK

(

W91330LN

only

)

(

W91330ALN

only

)

The function of this terminal is to prevent "0" dialing
and "9" dialing under PABX system long distance
call control. When the first key input after reset is 0
or 9, all key inputs, including the 0 or 9 key, become
invalid and the chip generates no output. The
telephone is reinitialized by a reset.

LOCK PIN

FUNCTION

Floating

Normal dialing mode

"0," "9" dialing inhibited

"0" dialing inhibited

BLOCK DIAGRAM

ROW

COLUMN

DTMF

MODE

RAM

COUNTER

SYSTEM CLOCK

GENERATOR

LOCATION
LATCH

D/A

ROW & COLUMN
PROGRAMMABLE

COUNTER

DATA LATCH
& DECODER

READ/WRITE

(R1 to R4, Vx)

(C1 to C4)

T/P MUTE

HFO

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD
INTERFACE

CONVERTER

LOCK

HKS

HFI

W91330N SERIES

- 6 -

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P1

R/P2

R: One-key redial function

R/P1, R/P2: Redial and pause function key, P1 is 3.6 sec. and P2 is 2.0 sec.

/T:

in tone mode and P

T in pulse mode

F1, ..., F4: Flash keys, F1 = 600 mS, F2 = 100 mS, F3 = 300 mS, F4 = 73 mS

Notes: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #

R/P: R/P1 or R/P2.

Fn: F1, ..., F4

Normal Dialing

OFF HOOK

(or

ON HOOK

HFI

¡i

, ...,

1. D1, D2, ..., Dn will be dialed out.

2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.

Redialing

OFF HOOK

(or

ON HOOK

HFI

¡i

, ...,

Busy,

Come

ON HOOK

OFF HOOK

(or

ON HOOK

HFI

¡i

R/P

The redial memory content will be dialed out.

The

R/P

key can execute the redial function only as the first key-in after off-hook; otherwise, it

executes pause function.

If redialing length oversteps 32 digits, the redialing function will be inhibited.

OFF HOOK

(or

ON HOOK

HFI

¡i

, ...,

Busy,

The one-key redialing function timing diagram is shown in Figure 4.

If the dialing of

is finished, pressing the

key will cause the pulse output pin to

go low for 2.2 seconds break time and 0.6 seconds pause time will automatically be added.

If the pulses of the dialed digits

have not finished,

will be ignored.

W91330N SERIES

Publication Release Date: May 1997

- 7 -

Revision A2

The redial function by

key has no break time (2.2 sec.) if it is the first key in after off-hook.

The

key uses the same redial buffer as the redial function by

R/P1

R/P2

key,

and it is actived during normal dialing or repertory dialing.

Access Pause

OFF HOOK

(or

ON HOOK

HFI

¡i

R/P

, ...,

1. The pause function can be stored in memory.

2. The pause function is executed in normal dialing, redial dialing, or memory dialing.

3. The pause duration of 2.0 or 3.6 seconds per pause is selected by keypad.

4. The detailed timing diagram for the pause function is shown in Figure 5.

5. Only one pause function can be released to user.

Pulse-to-tone (*/T)

OFF HOOK

(or

ON HOOK

HFI

¡i

, ...,

*/T

D1'

D2'

, ...,

Dn'

1. If the mode switch is set to pulse mode, then the output signal will be:

D1, D2,

...

, Dn, Pause (2.0 sec. or 3.6 sec.), D1', D2',

...

, Dn'

(Pulse)

(Tone )

If pause1 is excuted, the pause time of pulse-to-tone function is 3.6S. If pause2 is excuted, the
pause time of the pulse-to-tone function is 2.0S.

2. If the mode switch is set to tone mode, then the output signal will be as follows:

D1, D2, ..., Dn, *, D1', D2', ..., Dn'
(Tone)

(Tone)

3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse

mode only by going on-hook.

4. The pulse-to-tone function timing diagram is shown in Figure 6.

Flash

OFF HOOK

(or

ON HOOK

HFI

¡i

1. Fn = F1,

...

, F4

2. The dialer will execute flash break time of 600 mS (F1), 100 mS (F2), 300 mS (F3), or 73 mS (F4)

before the next digit is dialed out. In each case, the pause time is 1.0 sec.

W91330N SERIES

- 8 -

3. Flash key cannot be stored as a digit in memory. The flash key has the first priority among

the keyboard functions.

4. The system will return to the initial state after the flash pause time is finished.

5. The flash function timing diagram is shown in Figure 7.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATING

UNIT

DC Supply Voltage

-0.3 to +7.0

Input/Output Voltage

0.3

+0.3

0.3

+ 0.3

Power Dissipation

120

Operation Temperature

OPR

-20 to +70

Storage Temperature

STG

-55 to +150

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the

device.

DC CHARACTERISTICS

-V

= 2.5V, F

OSC.

= 3.579545 MHz, T

= 25

C, all outputs unloaded)

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Operating Voltage

2.0

5.5

Operating Current

Tone, Unloaded

0.4

0.6

Pulse, Unloaded

0.2

0.4

Standby Current

HKS = V

, No load

& No key entry

Memory Retention
Current

HKS = V

= 1.0V

0.2

DTMF Output Voltage

Row group,

= 5 K

130

150

170

mVrms

Pre-emphasis

Col/Row,

= 2.0 to 5.5V

DTMF Distortion

THD

= 5 K

= 2.0 to 5.5V

-30

-23

W91330N SERIES

Publication Release Date: May 1997

- 9 -

Revision A2

DC Characteristics, continued

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

DTMF Output DC
Level

TDC

= 5 K

= 2.0 to 5.5V

1.0

3.0

DTMF Output Sink
Current

= 0.5V

0.2

DP Output Sink
Current

= 0.5V

0.5

T/P MUTE Output Sink
Current

TML

TMO

= 0.5V

0.5

Key Tone Output

KTH

= 2.0V

0.5

Current

KTL

= 0.5V

0.5

HFO Drive/Sink

HFH

= 2.0V

0.5

Current

HFL

= 0.5V

0.5

Keypad Input Drive
Current

= 0.0V

Keypad Input Sink
Current

= 2.5V

200

400

HKS I/P Pull-High
Resistor

300

Keypad Resistance

AC CHARACTERISTICS

= 2.5V, F

OSC.

= 3.579545 MHz, T

= 25

C, all outputs unloaded.)

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Key-in Debounce

KID

Key Release Debounce

KRD

Off-Hook Delay

OFD

Lock only

300

First Key-in Delay

FKD

Lock only

300

Pre-digit-pause

PDP1

Mode = V

10 ppS

Mode = Floating

33.3

Pre-digit-pause

PDP2

Mode = V

20 ppS

Mode = Floating

16.7

Interdigit Pause

IDP

10 ppS

800

(Auto Dialing)

20 ppS

500

W91330N SERIES

- 10 -

AC Characteristics, continued

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Make/Break Ratio

M:B

Mode = V

40:60

Mode = Floating

33.3:66.7

Tone Output Duration

Auto dialing

Intertone Pause

ITP

Auto dialing

Flash Break Time

600

100

300

Flash Pause Time

F1, F2, F3, F4

1.0

Pause Time

R/P1

3.6

R/P2

2.0

Key Tone Frequency

600

Key Tone Duration

KTD

One-Key Redial Break
Time

2.2

One-Key Redial Pause
Time

0.6

Notes:

1. Crystal parameters suggested for proper operation are Rs < 100

, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,

OSC

. = 3.579545 MHz

0.02%.

2. Crystal oscillator accuracy directly affects these times.

TIMING WAVEFORMS

IDP

HKS

KEY IN

T/P MUTE

IDP

KID

IDP

PDP

M B

KRD

< 600 mS

< 300 mS

KID

DTMF

OSC.

Low

OSCILLATION

PDP

Figure 1(a). Normal Dialing Timing Diagram (Pulse Mode Without Lock Function)

W91330N SERIES

Publication Release Date: May 1997

- 11 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

OFD

IDP

PDP

KID

IDP

PDP

M B

KID

KRD

DTMF

OSC.

Low

OSCILLATION

FKD

< 600 mS

< 300 mS

Figure 1(b). Normal Dialing Timing Diagram (Pulse Mode with Lock Function)

HKS

KEY IN

T/P MUTE

R/P

KID

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

IDP

< 600 mS

KRD

Figure 1(c). Auto Dialing Timing Diagram (Pulse Mode Without Lock Function)

W91330N SERIES

- 12 -

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

OFD

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

R/P

KID

IDP

FKD

< 600 mS

300 mS

Figure 1(d). Auto Dialing Timing Diagram (Pulse Mode with Lock Function)

HKS

KEY IN

T/P MUTE

DTMF

KID

KRD

< 600 mS

< 300 mS

OSC.

OSCILLATION

ITP

KID

High

ITP

OSCILLATION

KRD

Figure 2(a). Normal Dialing Timing Diagram (Tone Mode Without Lock Function)

W91330N SERIES

Publication Release Date: May 1997

- 13 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

KID

KRD

< 600 mS

< 300 mS

OSC.

OFD

OSCILLATION

FKD

ITP

Figure 2(b). Normal Dialing Timing Diagram (Tone Mode with Lock Function)

HKS

KEY IN

T/P MUTE

DTMF

R/P

KRD

< 600 mS

OSC.

OSCILLATION

ITP

KID

Figure 2(c). Auto Dialing Timing Diagram (Tone Mode Without Lock Function)

W91330N SERIES

- 14 -

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

R/P

KRD

< 600 mS

300 mS

OSC.

OFD

OSCILLATION

FKD

ITP

Figure 2(d). Auto Dialing Timing Diagram (Tone Mode with Lock Function)

T/P MUTE

HFI

HKS

ON HOOK

HFO

High

CHIP ENBLE

Figure 3. Handfree Dialing Timing Diagram

W91330N SERIES

Publication Release Date: May 1997

- 15 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

OSC.

OFD

PDP

Low

OSCILLATION

FKD

< 600 mS

300 mS

KID

PDP

IDP

HFI

HFO

KID

Figure 4. One-key Redial Timing Diagram (Pulse Mode)

HKS

KEY IN

T/P MUTE

DTMF

OSC.

Low

OSCILLATION

< 600 mS

KID

R/P

OFD

300 mS

PDP

IDP

PDP

FKD

OSCILLATION

Figure 5. Pause Function Timing Diagram

W91330N SERIES

- 16 -

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

OSC.

OSCILLATION

< 600 mS

KID

*/T

OFD

300 mS

PDP

IDP

FKD

OSCILLATION

ITP

Figure 6. Pulse-to-tone Timing Diagram

T/P MUTE

HKS

KID

DTMF

OSC.

KEY IN

Low

KID

ITP

OSCILLATION

HFI

HFO

Figure 7. Flash Timing Diagram

W91330N SERIES

Publication Release Date: May 1997

- 17 -

Revision A2

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792766
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27513100
FAX: 852-27552064

Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.

2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798

Note: All data and specifications are subject to change without notice.

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