GENERAL DESCRIPTION

The W91590 series dialers Si-gate CMOS IC tone/pulse switchable dialers with a 24-channel automatic dialing memory, including a 16-digit × 3 emergency dialing memory, a 16-digit × 20 channel repertory memory that provides one-touch and three-touch dialing, and a 32-digit mercury memory. These dialers also provide flash, clear, hold, and one-key redial functions.

FEATURES
· DTMF/Pulse switchable dialer
· 32-digit LNB (last number buffer) memory (both tone and pulse mode)
· 32-digit mercury memory (tone/pulse mode)
· 16-digit ′ 3 one-touch direct repertory memory (tone/pulse mode)
· 16-digit ′ 20 direct or indirect repertory memory (tone/pulse mode)
· Uses 9 ′ 5 keyboard
· Flash time: 98 mS, 305 mS, or 600 mS (selectable by keypad option)
· Pause time: 3.6 sec.
· Pause P＆#174;T (pulse-to-tone) can be stored as a digit in memory
· 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