Description

The RX3140 is a low power IF receiver IC which is fully compatible with the Toshiba TA31142 IC and is suitable for use as the second IF downconverter in double-conversion paging systems. The RX3140 is well-suited for POCSAG paging applications and incorporates a 2-level FSK demodulator consisting of a quadrature FM demodulator, on-chip bit-rate filter, and 1-bit comparator. An on-chip 1 V regulator is provided for convenient biasing of off-chip circuitry.

Features

Extremely low power operation with power-down feature

Built-in crystal oscillator for mixer local oscillator

Mixer input frequency: 10 — 50 MHz

Quadrature detector

On-chip bit-rate filter

Audio output

1-bit comparator with open collector output

1 V regulator

1.1 V low battery alarm

SSOP-20 package (0.65 mm pitch)