ACE9040 provides all the speech signal processing and data/SAT tone filtering needed for AMPS or TACS analog cellular telephones.

Transmit voice channel functions comprise a microphone amplifier, soft limiter, bandpass filter, compressor, hard limiter, lowpass filter and a gain controlled amplifier to set deviation level. Additional transmit circuits include a DTMF generator, data and SAT filters, deviation setting amplifiers for data/ST and SAT and a modulation combiner.

FEATURES

■ Low Power and Low Voltage (3·6 to 5·0 V) Operation

■ Power Down Modes

■ Direct Connections to Microphone and Earpiece

■ Compander with wide operating range: Compressor 74 db typ., Expander 36 dB typ.

■ SAT Bandpass and Data Lowpass Filters

■ Handsfree Operation Supported

■ DTMF Generator

■ Serial Bus Controlled Gains and Filter Responses

■ Part of the ACE Integrated Cellular Phone Chipset

■ TQFP 64 Pin 10X10 mm or 7X7 mm Packages

APPLICATIONS

■ AMPS and TACS Cellular Telephones

■ Two-Way Radio Systems