MSM7540
Description
The MSM7540/7560 are single channel ADPCM CODEC ICs which perform mutual transcoding between an analog voice band signal 300 to 3400 Hz and 32 kbps ADPCM serial data.
Key Features
- Single 5 V Power Supply Operation
- ADPCM Algorithm : plies pletely with 1988's version ITU-T G.721 (32 kbps)
- Transmit/Receive Full-Duplex Operation
- Transmit/Receive Synchronous Mode Only
- Serial ADPCM Transmission Data Rate : 32 kbps to 2048 kbps
- Serial PCM Transmission Data Rate : 64 kbps to 2048 kbps
- Low Power Consumption Operating Mode : 60 mW Typ. Power-Down Mode : 1.0 mW Typ
- Two Analog Input Amplifier Stages : Externally Adjustable Gain
- Analog Output Stage : Push-pull Drive (direct drive of 350 W␣ + 120 nF)
- Built-in Crystal Oscillator (10.368 MHz)
