■ DESCRIPTION

The FUJITSU MB86435 is an AIU (audio interface unit) LSI for +3 V single-power source digital telephone devices, manufactured using CMOS process technology. The codec transmission filter characteristics meet G.712 standards, and can handle input and output in A-Law, μ-Law and linear conversion modes. The MB86435 also contains the necessary DTMF, microphone and receiver amps for telephone devices.

■ FEATURES

? +3 V single power supply

? Low power consumption: muting settings for each operating mode

Normal operation : 6.0 mA TYP (speaker amp mute)

Tone generation : 1.8 mA TYP (speaker amp mute)

Standby mode : 0.5 μA TYP

? On-chip codec filter meets G.712 standards

? Selection of codec conversion methods (A-law, μ-law, linear)

? On-chip low-noise microphone amp (2-channel) (0 to 35 dB amplification)

? On-chip receiver speaker amps (32 ?BTL type: 6.4 mW MIN)

? On-chip tone speaker amp (25 ?BTL type: 10 mW MIN)

? On-chip earphone speaker amps (32 ? single type: 2 mW MIN)

? On-chip electronic volume gain adjustments (sending, receiving, tone)

? On-chip accessory input/output circuits

? DTMF generator function

? Service tone generation

? CMOS compatible input/output