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: