GENERAL DESCRIPTION
The W91473 series are Si-gate CMOS IC tone/pulse switchable dialers containing a 14-channel automatic dialing memory, including a 16-digit ´ 3 emergency dialing memory and a 16-digit ´ 10 channel repertory memory that provides a 32-digit mercury memory. These dialers also provide flash, clear, hold, lock, and one-key redial functions.

FEATURES
• DTMF/Pulse switchable dialer
• 32-digit LNB (last number buffer) memory
• 32-digit mercury memory
• 16-digit ´ 3 one-touch direct repertory memory
• 16-digit ´ 10 direct repertory memory
• Uses 7 ´ 5 keyboard
• Flash time: 98 mS, 305 mS, or 600 mS (selectable by keypad option)
• Minimum tone output duration: 93 mS
• Minimum intertone pause: 93 mS
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• Packaged in 22, 24, or 28-pin plastic DIP
• The different dialers in the W91473 series are shown in the following table: