GENERAL DESCRIPTION
The W91340N series are tone/pluse switchable telephone dialers with ten memories, hold function, and a handfree dialing control circuit. Fabricated using CMOS technology, the W91340N series offer good performance in low-voltage and low-power applications.

FEATURES
• DTMF/pulse switchable dialer
• 32-digit redial memory
• Ten by 16-digit two-touch direct repertory memory
• Cascaded dialing allowed, with unlimited dialing length
• Pulse-to-tone (*/T) keypad for long distance call operation
• Uses 5 x 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
• Dialing rate (10 ppS or 20 ppS) is selectable by bonding option
• On-hook debounce time: 150 msec.
• Minimum tone output duration: 93 msec. (W91344AN: 87 mS)
• Minimum intertone pause: 93 msec. (W91344AN: 87 mS)
• Flash break time (73, 100, 300, 600 msec) selectable by keypad; pause time is 1.0 sec.
• Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• Packaged in 18 or 20-pin plastic DIP