W91460N SERIES

3-MEMORY TONE/PULSE DIALER

WITH SAVE FUNCTION

Publication Release Date: May 1997

- 1 -

Revision A2

GENERAL DESCRIPTION

The W91460N series are Si-gate CMOS ICs that provide the necessary signals for either tone or
pulse dialing. The W91460N series features save memory and 3 by 16-digit automatic dialing
memory.

FEATURES

DTMF/pulse switchable dialer

Two by 32-digit redial and save memory

Three by 16-digit one-touch direct memory

Redial memory cascadable with normal dialing; dialing length is unlimited, but if length exceeds
32-digit the redial function is inhibited

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

Uses 5

5 keyboard

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

Flash, pause, P

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

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

On-hook debounce time: 150 msec.

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-pin plastic DIP

The different dialers in the W91460N series are shown in the following table:

TYPE NO.

REPLACEMENT

TYPE NO.

PULSE

(ppS)

FLASH

(mS)

PAUSE

(S)

M/B

W91462

W91462N

W91463

600/300/73/100

3.6

W91464

W91465

W91466N

W91466

600/300/73/100

3.6

W91467

W91460N SERIES

- 2 -

PIN CONFIGURATION

T/P MUTE

HKS

DTMF

MODE

PIN DESCRIPTION

SYMBOL

PIN

I/O

FUNCTION

Column-

Row

Inputs

The keyboard inputs may be used with either a standard 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

40:60 (10 ppS for W91462N and 20 ppS for W91466N).

Floating mode pin places the dialer in pulse mode with M/B ratio
33.3:66.7 (10 ppS for W91462N and 20 ppS for W91466N).

W91460N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

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.

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).

, V

14, 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

W91460N SERIES

- 4 -

BLOCK DIAGRAM

DTMF

RAM

COUNTER

SYSTEM CLOCK
GENERATOR

LOCATION
LATCH

D/A

ROW & COLUMN
PROGRAMMABLE

COUNTER

DATA LATCH

& DECODER

READ/WRITE

ROW

COLUMN

(R1 to R4, Vx)

(C1 to C5)

T/P MUTE

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD

INTERFACE

CONVERTER

HKS

MODE

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P

SAVE

S: Store 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

Note: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #; Mn: M1, ..., M3; Fn: F1, ..., F4

W91460N SERIES

Publication Release Date: May 1997

- 5 -

Revision A2

Normal Dialing

OFF HOOK

, ...,

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

, ...,

Busy, Come

ON HOOK

OFF HOOK

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 the pause function.

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

Number Store

OFF

HOOK

...,

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

...,

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;

*/T

is the pulse to tone function key.

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

Repertory Dialing

OFF HOOK

Access Pause

OFF HOOK

R/P

, ...,

1. The pause function can be stored as a digit in memory.
2. The pause function is executed in normal dialing, redial dialing, or memory dialing.
3. A detailed timing diagram for the pause function is shown in Figure 3.

Pulse-to-tone (*/T)

Part Number W91460N