MSM7586-xx Description
The MSM7586 is a CMOS IC developed for use with digital cordless telephones. The device provides a p/4 shift QPSK modem function and a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data. The MSM7586 performs DTMF tone and several types of tone generation, transmit/receive data, mute and gain control, side-tone pass and its gain control, and VOX function.
MSM7586-xx Key Features
- 384 kbps transmission speed
- Built-in root Nyquist digital filter for the baseband band limiter
- Built-in D/A converters for the analog outputs of the quadrature signal ponent I and Q
- The DC offset and gain can be adjusted with respect to the differential I and Q analog outputs
- pletely digitized p/4 shift QPSK demodulator system (ADPCM CODEC Unit)
- ADPCM system: built-in ITU-T Remendations G.726 (32kbps, 24 kbps, 16 kbps)
- Transmit/receive full-duplex capability
- PCM interface code format: selectable between m-law and A-law
- Serial ADPCM and PCM transmission rate: 64 kbps to 2,048 kbps
- Transmit/receive mute function; transmit/receive programmable gain setting