GENERAL DESCRIPTION

The W9145 series are Si-gate CMOS ICs that provide the necessary signals for either pulse or tone dialing. The W9145 series feature a key tone function, handfree dialing, a lock function, thirteen 16-digit automatic dialing memories, and two by 32-digit for redial and save memory.

FEATURES

· DTMF/Pulse switchable dialer

· Two by 32 digits for redial and save memory

· Three by 16 digits for one-touch direct repertory

· Ten by 16 digits for two-touch indirect repertory

· Unlimited dialing length (redial inhibited if dialing length exceeds 32 digits in normal dialing)

· Auto Pause Access for PBX and toll service operations (3.1 seconds per pause)

· Easy operation with redial, store, auto and pause keypads

· Key tone output for recognition of valid keypad entry

· Call disconnect (CD) key for line break operation

· Mute key for speech mute

· Flash time: 98 mS, 305 mS or 600 mS

· Minimum tone output duration: 93 mS

· Minimum intertone pause: 93 mS

· 0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out

· Automatic switching from pulse mode to tone mode by */T key operation

· Break/make ratio pin selectable

· Uses Form A keyboard or standard 5 ′5 matrix keyboard

· Uses inexpensive 3.579545 MHz television color-burst crystal

· Internally generated power-on reset

· Packaged in 22/24-pin DIP