WE9142/A

The WE9142/A is designed as one kind of monolithic integrated circuit which performs 10 memory tone / pulse switchable dialing functions for modern telephone set design. It is fabricated in CMOS technology thus has good performance in low voltage, low power operations. Wide operating voltage range and low memory retention current facilltate this chip excellent for battery-free direct line powered operation.

Features of the WE9142/A are:(1)DTMF / pulse switchable dialer;(2)store tem 16-digits numbers for repertory dialing;(3)one 31-digits for redial memory;(4)dialing length is unlimited, but if the dialing length of normal-dialing overstep 31 digits then redial is inhibited;(5)auto pause access for PBX and toll service operations; 3.1 second per pause;(6)easy operation with redial, store, auto and pause keypads;(7)wide operation voltage range:2.0V to 5.5V;(8)power on reset is internally generated;(9)electronic keypad input is available, low action;(10)22-pin dual-in-line package.

The absolute maximum ratings of the WE9142/A can be summarized as:(1)DC supply voltage:6.0 V;(2)input voltage range:-0.5 to VDD+0.5 V;(3)power dissipation per package:500 (for Ta=-25 to +60) mW;(4)operating temperature:-25 to +85;(5)storage temperature:-65 to +150. If you want to know more information such as the electrical characteristics about the WE9142/A, please download the datasheet in www.seekic.com or www.chinaicmart.com .