MSM7540L

E2U0027-28-83 ¡ Semiconductor MSM7540L/7560L ¡ Semiconductor Single Rail ADPCM CODEC This version: Aug. 1998 MSM7540L/7560L Previous version: Nov. 1996 GENERAL DESCRIPTION The MSM7540L/7560L 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 from a single 3 V power supply and provide low power consumption. The MSM7540L/7560L are optimized for advanced digital cordless telephone system applications. FEATURES Single 3 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 MSM7540L : A-law or Linear (14 bit, 2's compliment) Selectable MSM7560L : m-law or Linear (14 bit, 2's compliment) Selectable Low Power Consumption Operating Mode : 18 mW Typ. (VDD = 3.0 V) Power-Down Mode : 0.3 mW Typ. (VDD = 3.0 V) 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: MSM7540LGS-...