MSM7540

FEDL7540-03 FEDL7540-03 This version: Nov. 1999 MSM7540/7560 Previous version: Aug. 1998 ¡ Semiconductor MSM7540/7560 ¡ Semiconductor Single Rail ADPCM CODEC GENERAL DESCRIPTION The MSM7540/7560 are single channel ADPCM CODEC ICs which perform mutual transcoding between an analog voice band signal 300 to 3400 Hz and 32 kbps ADPCM serial data. Using advanced circuit technology, these devices operate using a single 5 V power supply and have low power consumption. The MSM7540/7560 are optimized for advanced digital cordless telephone system applications. FEATURES Single 5 V Power Supply Operation ADPCM Algorithm : Complies completely with 1988's version ITU-T G.721 (32 kbps) Transmit/Receive Full-Duplex Operation Transmit/Receive Synchronous Mode Only Serial ADPCM Transmission Data Rate : 32 kbps to 2048 kbps Serial PCM Transmission Data Rate : 64 kbps to 2048 kbps PCM Interface Coding Format MSM7540 : A-law or Linear (14-bit, 2's compliment) Selectable MSM7560 : m-law or Linear (14-bit, 2's compliment) Selectable Low Power Consumption Operating Mode : 60 mW Typ. Power-Down Mode : 1.0 mW Typ. Two Analog Input Amplifier Stages : Externally Adjustable Gain Analog Output Stage : Push-pull Drive (direct drive of 350 W␣ + 120 nF) Built-in Crystal Oscillator (10.368 MHz) Built-in Reference Voltage Supply Option Reset Specified by ITU-T G. 721/ADPCM Package: 28-pin plastic SOP (SOP28-P-430-1.27-K) (Product name: MSM7540GS-K) (Product name: MSM7560GS-K) ...