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MSM7560 Dataheets PDF



Part Number MSM7560
Manufacturers OKI
Logo OKI
Description Single Rail ADPCM CODEC
Datasheet MSM7560 DatasheetMSM7560 Datasheet (PDF)

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 .

  MSM7560   MSM7560



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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) 1/16 BLOCK DIAGRAM ¡ Semiconductor V DD AG DG AIN1 GSX1 AIN2 GSX2 SG PDN MCK RES LPS AOUT+ –1 – + – + X1 X2 – + RCLPF A/D Conv. 0 BPF 1 COMPANDER 1 0 ADPCM CODER 0 1 P / S P / S S / P S / P XSYNC IS BCLKA PCMSO V REF CLOCK/ TIMING PCMSI BCLKB PCMRI 1 0 1 LPF 0 0 1 AOUT– PWI VFRO P / S PCMRO RCLPF D/A Conv. EXPANDER ADPCM DECODER S / P IR RSYNC MSM7540/7560 FEDL7540-03 2/16 FEDL7540-03 ¡ Semiconductor MSM7540/7560 PIN CONFIGURATION (TOP VIEW) RES 1 PCMRI 2 PCMRO 3 IR 4 IS 5 PCMSI 6 PCMSO 7 LPS 8 DG 9 AG 10 SG 11 AIN1 12 GSX1 13 AIN2 14 28 BCLKB 27 BCLKA 26 XSYNC 25 RSYNC 24 MCK 23 X2 22 X1 21 PDN 20 VDD 19 AOUT+ 18 AOUT– 17 PWI 16 VFRO 15 GSX2 28-Pin Plastic SOP 3/16 FEDL7540-03 ¡ Semiconductor MSM7540/7560 PIN AND FUNCTIONAL DESCRIPTIONS AIN1, AIN2, GSX1, GSX2 Transmit analog inputs and the output for transmit gain adjustment. AIN1 (AIN2) connects to the inverting input of the internal transmit amplifier. GSX1 (GSX2) connects to the internal transmit amplifier output. Refer to Fig. 1 for gain adjustment. VFRO, AOUT+, AOUT–, PWI Receive analog output and the output for receive gain adjustment. VFRO is the receive filter output. AOUT+ and AOUT– are differential analog signal outputs which can directly drive ZL = 350 W + 120 nF. Refer to Fig. 1 for gain adjustment. Analog Input C1 R1 AIN1 – + R2 GSX1 C2 R3 AIN2 – + to ENCODER R4 GSX2 Transmit Gain: = (R2/R1) ¥ (R4/R3) RS* Receive Gain: = (R6/R5) R5 PWI VFRO from DECODER R6 AOUT– – +.


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