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