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MSM7705-01/02/03
4ch Single Rail CODEC
 

Documents Applications Description Block Diagram Features

Documents

»  PDF of this Data Sheet (145 KB) is available. MSM7705-01-02-03.pdf
»  Cross comparison of Motorola's discontinued Codecs. Codec Oki / Motorola Cross-reference Tables

Applications

»  Telecom
»  Switch

Description

The MSM7705-01/02/03 are four-channel CODEC CMOS ICs for voice signals ranging from 300 to 3400 Hz. These devices contain filters for A/D and D/A conversion.

Designed especially for single-power supply and low-power applications, these devices contain four-channel A/D and D/A converters in a single chip and achieve a reduced footprint and a reduced number of external components.

The MSM7705-01/02/03 are best suited for digital telephone terminals, digital PABXs, and push-button phones.

   

Block Diagram


 

Features

»  Single power supply: +5 V
»  Power consumption
»  Operating mode: 70mW Typ. 140mW Max.
»  Power-saving mode: 14 mW Typ. 32mW Max.
»  Power-down mode: 0.05mW Typ. 0.3mW Max.
»  Conforms to ITU-T Companding law
»  MSM7705-01: µ/A-law pin-selectable
»  MSM7705-02: µ-law
»  MSM7705-03: A-law
»  Built-in PLL eliminates a master clock
»  The PCM interface can be switched between 4 channel serial/parallel
»  Transmission clock: 64/128/256/512/1024/2048 kHz
96/192/384/768/1536/1544 kHz
(During 4 channel serial mode, the 64, 96, 128, and 192 kHz clocks are disabled)
»  Transmit gain adjustable for each channel
»  Built-in reference voltage supply
»  Analog output can directly drive a 600 Omega line transformer
»  Package:
»  44-pin plastic QFP (QFP44-P-910-0.80-2K)
(Product name: MSM7705-01GS-2K)
(Product name: MSM7705-02GS-2K)
(Product name: MSM7705-03GS-2K)