UM92870

The UM92870 is a complete DTMF receiver designed to detect standard DTMF signals.It includes a differential input amplifier,filer section,decoder section,and steeromg logic circuits.The differential input amplifier allows adjustment of gain and choice of input confifuration.

Features of the UM92870 are:(1)full DTMF receiver in single 18-pin package;(2)single 5-volt power supply;(3)internal gain setting amplifier;(4)adjustable guard time;(5)built-in dial-tone filter;(6)uses inexpensive 3.5795 MHz crystal;(7)CMOS for low power consumption;(8)tristate outputs;(9)early steeing output.

If you want to know more information such as the electrical characteristics about the UM92870, please download the datasheet in www.seekic.com or www.chinaicmart.com .