W91621 Ver la hoja de datos (PDF) - Winbond

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W91621

10-MEMORY TONE/PULSE DIALER WITH TWO-STAGE REDIAL FUNCTION

Winbond 

W91620 SERIES

10-MEMORY TONE/PULSE DIALER WITH

TWO-STAGE REDIAL FUNCTION

GENERAL DESCRIPTION

The W91620 series are Si-gate CMOS ICs that provide the signals needed for either pulse or tone

dialing. The W91620 series features a ten-channel, 32-digit automatic dialing memory.

FEATURES

• DTMF/Pulse switchable dialer

• 32-digit redial memory

• Two-stage redial function

• Ten by 32 digit two-touch indirect repertory memory

• Mixed dialing, cascade dialing allowed

• Pulse-to-tone (P→T) keypad for long distance call operation

• Easy operation with redial, flash, pause and P→T keypads

• Pause, pulse-to-tone (P→T) can be stored as a digit in memory

• Tone output duration: as long as key is depressed or 90 mS minimum

• Minimum intertone pause: 90 mS

• Flash time: 100 mS

• Uses 4 × 5 keyboard

• On-chip power-on reset

• Uses 3.579545 MHz crystal or ceramic resonator

• Packaged in 18-pin DIP

• The different dialers in the W91620 series are shown in the following table

TYPE NO.

DIALING RATE

PAUSE

B:M

W91620

10 ppS

4 sec

2:1

W91621

3:2

FLASH

100 mS

Publication Release Date: December 1994

-1-

Revision A3

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