MSM7704

E2U0021-28-81 ¡ Semiconductor MSM7704-01/02/03 ¡ Semiconductor 2ch Single Rail CODEC This version: Aug. 1998 MSM7704-01/02/03 Previous version: Nov. 1996 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 : MSM7...