MSM7705

E2U0042-28-81 ¡ Semiconductor MSM7705-01/02/03 ¡ Semiconductor 4ch Single Rail CODEC This version: Aug. 1998 MSM7705-01/02/03 Previous version: Nov. 1996 GENERAL 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 a 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 pushbutton phones. FEATURES Single power supply: +5 V Power consumption Operating mode: 70 mW Typ. 140 mW Max. Power-saving mode: 14 mW Typ. 32 mW Max. Power-down mode: 0.05 mW Typ. 0.3 mW Max. Conforms to ITU-T Companding law MSM7705-01: m/A-law pin-selectable MSM7705-02: m-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 W 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 :...