GENERAL DESCRIPTION

The W91320N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse dialing. The W91320N series provide one-key redial, handfree dialing, hold, redial, and lock functions.

FEATURES

· DTMF/pulse switchable dialer

· 32-digit redial memory

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

· Uses 5 ′ 5 keyboard

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

· Pause, pulse-to-tone (*/T) can be stored as a digit in memory

· 0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out

· Off-hook delay 300 mS in lock mode ( DP will keep low for 300 mS while off hook)

· First key-in delay 300 mS output in lock mode

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

· 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 1.0 sec.

· On-chip power-on reset

· Uses 3.579545 MHz crystal or ceramic resonator

· Packaged in 18, 20, or 22-pin plastic DIP