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