W91350N SERIES

13-MEMORY TONE/PULSE DIALER WITH

HANDFREE AND HOLD FUNCTIONS

Publication Release Date: May 1997

- 1 -

Revision A2

GENERAL DESCRIPTION

The W91350N series are tone/pluse switchable telephone dialers with thirteen memories, hold
function, and a handfree dialing control circuit. Fabricated using CMOS technology, the W91350N series
offer good performance in low-voltage and low-power applications.

FEATURES

DTMF/pulse switchable dialer

Two by 32-digit redial memory and save memory

Three by 16-digit one-touch direct repertory memory

Ten by 16-digit two-touch direct repertory memory

Cascaded dialing allowed, with unlimited dialing length

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

Uses 5

5 keyboard

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

Pause, P

T (pulse-to-tone) can be stored as a digit in memory

Dialing rate (10 ppS or 20 ppS) is selectable by bonding option

On-hook debounce time: 150 msec.

Minimum tone output duration: 93 msec. (W91354AN: 87 mS)

Minimum intertone pause: 93 msec. (W91354AN: 87 mS)

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

Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin

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 W91350N series are shown in the following table:

TYPE NO.

REPLACEMENT

TYPE NO.

PULSE

(ppS)

FLASH

(mS)

M/B

HANDFREE

DIALING

PACKAGE

(PINS)

W91350N

W91350

600/300/73/100

W91351

W91352N

W91352

600/300/73/100

W91350AN

W91350A

600/300/73/100

Yes

W91351A

W91352AN

W91352A

600/300/73/100

Yes

W91354AN

New type

600/300/73/100

Yes

Note: The W91354AN is for use in France only. The pause time is not added in pulse-to-tone function mode.

W91350N SERIES

- 2 -

PIN CONFIGURATIONS

T/P MUTE

HFI

HKS

DTMF

MODE

HFO

H/P MUTE

DP/C5

T/P MUTE

HKS

DTMF

MODE

DP/C5

H/P MUTE

W91350N/352N W91350AN/352AN/354AN

PIN DESCRIPTION

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

Column-

Row Inputs

The keyboard inputs may be used with either a standard
5

5 keyboard or an 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
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

with M/B ratio of 40:60 (10 ppS, except for
W91352N/352AN = 20 ppS).
Floating mode pin places the dialer in pulse mode with M/B
ratio of 33.3:66.7 (10 ppS, except for W91352N/352AN =
20 ppS).

HKS

Hook switch input.

HKS = V

: On-hook state. Chip in sleeping mode, no

operation.

HKS = V

: Off-hook state. Chip is enabled for normal

operation.

HKS pin is pulled to V

by an internal resistor.

W91350N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

Pin Description, continued

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

N-channel open drain dialing pulse output.

Flash key will cause

to be active in either tone

mode or pulse mode.

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

, V

14, 6

16, 6

Power input pins.

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).

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 an internal resistor.

Detailed timing diagram is shown in Figure 3.

H/P MUTE

The H/P MUTE is a conventional inverter output. During
pulse dialing, flash break or hold period, this output is active
high; otherwise, it remains in low state.

W91350N SERIES

- 4 -

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

HKS

HFI

DP/C5

H/P MUTE

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P

SAVE

S: Store function key

H: Hold function key

A: Indirect repertory memory dialing function key

R/P: Redial and pause function key

SAVE: Save function key

/T:

in tone mode and P

T in pulse mode

M1, ..., M3: One-touch memory

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

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

Mn: M1 , ..., M3 ; Ln: 0, ..., 9; Fn: F1, ..., F4

W91350N SERIES

Publication Release Date: May 1997

- 5 -

Revision A2

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 exceeds 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

1. The redial memory content will be dialed out.

2. The

R/P

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

otherwise, it

executes pause function.

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

Number Store

OFF HOOK

, (or

ON HOOK

HFI

¡i

, ...,

( or

)

1. If the sequence of the dialed digits D1, D2, ..., Dn has not finished,

will be ignored.

2. D1, D2, ..., Dn will be dialed out and stored in memory location.

OFF HOOK

, (or

ON HOOK

HFI

¡i

, ...,

( or

)

3. D1, D2, ..., Dn will be stored in memory location but will not be dialed out.

R/P

and

*/T

keys can be stored as a digit in memory.

In store mode,

R/P

is the pause function key.

5. The store mode is released after the store function is executed or when the state of the hook

switch changes.

Repertory Dialing

OFF HOOK

, (or

ON HOOK

HFI

¡i

OFF HOOK

, (or

ON HOOK

HFI

¡i

Access Pause

OFF HOOK

, (or

ON HOOK

HFI

¡i

R/P

, ...,

1. The pause function can be stored as a digit in memory.

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W9135xN

Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W9135xN

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W9135xN