GENERAL DESCRIPTION
The W91472N series are tone/pulse switchable telephone dialers with five memories, save memory, and handfree dialing control. These chips are fabricated using Winbond's high-performance CMOS technology and thus offer good performance in low-voltage and low-power operations.

FEATURES
· DTMF/pulse switchable dialer
· Two by 32 digit redial and save memory
· Five by 16 digit one-touch direct repertory memory
· Pulse-to-tone (*/T) keypad for long distance call operation
· Cascaded dialing
· Uses 5 ´6 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) selectable by bonding option
·On-hook debounce time: 150 mS
· Minimum tone output duration: 93 mS
· Minimum intertone pause: 93 mS
· Pause time: 3.6 sec.
· Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0S
· 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
· 18 or 20-pin dual-in-line plastic package