GENERAL DESCRIPTION
The MSM7704-01/7704-02/7704-03 are two-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 a single-power supply and low-power applications, these devices contain two-channel AD/DA converters in a single chip and achieve a reduced footprint and a reduced number of external components.
The MSM7704-01/7704-02/7704-03 are best suited for an analog interface to an echo canceller DSP used in digital telephone terminals, digital PABXs, and hands free terminals.

FEATURES
• Single power supply: +2.7 V to +3.8 V
• Power consumption
   Operating mode: 30 mW Typ. 50 mW Max.
   Power-saving mode: 3 mW Typ. 6 mW Max.
   Power-down mode: 0.03 mW Typ. 0.3 mW Max.
• ITU-T Companding law
   MSM7704-01: m/A-law pin-selectable
   MSM7704-02: m-law
   MSM7704-03: A-law
• Built-in PLL eliminates a master clock
• The PCM interface can be switched between 2 channel serial/parallel
• Transmission clock: 64/128/256/512/1024/2048 kHz 96/192/384/768/1536/1544/200 kHz
   (During 2 channel serial mode, the 64 and 96 kHz clocks are disabled)
• Adjustable transmit gain
• Built-in reference voltage supply
• Analog output can directly drive a 1.2 kW load
• Package:
   24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM7704-01GS-K)
                                                         (Product name : MSM7704-02GS-K)
                                                         (Product name : MSM7704-03GS-K)