CM8870 is a DTMF Receiver IC which provides full compatibility by integrating both bands split filter and digital decoder function. The device is manufactured by using state-of-art CMOS technology to provide low power consumption and handle precise data. it uses a digital counting technique for both detection and decoding of all 16 DTMF tone pairs in 4-bit code. In the filter section it uses the switched capacitor technique for both high and low group filters and dial tone rejection. CM8870 IC has an inbuilt differential input amplifier clock generator and a latched three interface bus because of this it minimizes external components.

Specification

Supply voltage: 4.75V to 5.25V

Supply current: 3 to 7mA

Standby supply current: 25�A

Typical power consumption: 15mW

Maximum power consumption: 35mw

Maximum Low-level input voltage: 1.5V

minimum High-level input voltage: 3.5V

Maximum low-level output voltage: 0.03V

Minimum High-level output voltage: 4.97V

Input leakage current: 0.1�A

Application

PABX

Central office

Mobile radio

Remote control data entry

Paging system

Call limitine 

Telephone answering system

Package contains

1 x CM8870 IC

Product Details :