GENERAL DESCRIPTION
The W91210 series are Si-gate CMOS ICs that provide the necessary signals for either pulse or tone dialing. The W91210 series features a redial function.

FEATURES
• DTMF/Pulse switchable dialer
• One by 32 digits for redial memory
• Pulse-to-tone (*/T) keypad for long distance call operation
• Uses 4 ´ 4 keyboard
• Easy operation with redial, flash, pause, and */T keypads
• Pause, P®T (pulse-to-tone) can be stored as a digit in memory
• Minimum tone output duration: 87 mS
• Minimum intertone pause: 87 mS
• Flash time (100 mS, 300 mS or 600 mS) selectable by keypad
• Pause time 3.6 sec or 2.0 sec
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• Packaged in 16-pin plastic DIP
• The different dialers in the W91210 series are described in the following table: