General Description

The UM3750 Encoder/Decoder is a CMOS/LSI digital code Transmitter-Receiver system. Working in the transmit (encoder) mode, the UM3750 will sequentially encode and transmit 12 bits of input. Each of the 12 bits may be 1 or 0 to allow 4096 different codes.

Features

■ Single chip contains both Encoder and Decoder.

■ 3V to 11 V operation.

■ On chip oscillator uses non-critical RC components.

■ Cross interference of recetver is virtually eliminated

by circuitry which requires 4 valid words to be received,

each within 64ms of the other.

■ Schmitt Trigger input provides excellent noise immunity.

■ Applications. alarm control system, security system

cordless telephone, remote control.

■ Interfaces with RF, ultrasonic, or infrared modulators

and demodulators