W91444G Winbond, W91444G Datasheet

W91444G

Manufacturer Part Number

W91444G

Description

Manufacturer

Winbond

Datasheet

1.W91444G.pdf (14 pages)

Specifications of W91444G

Case

DIP

Date_code

1994

Current page: 1 of 14
Download datasheet (67Kb)

GENERAL DESCRIPTION

The W91440N series are Si-gate CMOS ICs that provide the necessary signals for either tone or

pulse dialing. The W91440N series features save memory and a 10 by 16 digit automatic dialing

memory.

FEATURES

DTMF/pulse switchable dialer

Two by 32 digit redial and save memory

Ten by 16 digit two-touch direct memory

Redial memory cascadable with normal dialing; dialing length is unlimited, but if length

oversteps 32 digits the redial function is inhibited

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

Uses 5

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, and the pause time is 1 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 W91440N series are shown in the following table:

W91442N

W91443N

TYPE NO.

5 keyboard

W91442

W91443

W91444

W91446

W91447

W91444G

W91445G

W91443

REPLACEMENT

TYPE NO.

10-MEMORY TONE/PULSE DIALER

PULSE

(ppS)

- 1 -

600/300/73/100

WITH SAVE FUNCTION

FLASH

(mS)

Publication Release Date: May 1997

W91440N SERIES

PAUSE

(S)

3.6

Revision A3

M/B

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