W91620 Datasheet, PDF (1/16 Pages) Winbond – 10-MEMORY TONE/PULSE DIALER WITH TWO-STAGE REDIAL FUNCTION

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