RX3140

` 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)

V_SS = 0 V

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 incor-porates 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 convenientbiasing of off-chip circuitry.