MSM7540 Datasheet

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FEDL7540-03

FEDL7540-03

This version: Nov. 1999

MSM7540/7560

Previous version: Aug. 1998

隆 Semiconductor

MSM7540/7560

隆 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

鈥?Single 5 V Power Supply Operation

鈥?ADPCM Algorithm :

Complies completely with 1988's version ITU-T

G.721 (32 kbps)

鈥?Transmit/Receive Full-Duplex Operation

鈥?Transmit/Receive Synchronous Mode Only

鈥?Serial ADPCM Transmission Data Rate :

32 kbps to 2048 kbps

64 kbps to 2048 kbps

鈥?Serial PCM Transmission Data Rate :

鈥?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

鈥?Low Power Consumption

Operating Mode :

60 mW Typ.

Power-Down Mode :

1.0 mW Typ.

Externally Adjustable Gain

鈥?Two Analog Input Amplifier Stages :

Push-pull Drive (direct drive of 350

W

+ 120 nF)

鈥?Analog Output Stage :

鈥?Built-in Crystal Oscillator (10.368 MHz)

鈥?Built-in Reference Voltage Supply

鈥?Option Reset Specified by ITU-T G. 721/ADPCM

鈥?Package:

28-pin plastic SOP

(SOP28-P-430-1.27-K) (Product name: MSM7540GS-K)

(Product name: MSM7560GS-K)

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• MSM7547
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• MSM7557
  英文版
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• MSM7560
  英文版
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• MSM7566
  英文版
  Single Rail CODEC
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  MSM7566
• MSM7567
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  Single Rail CODEC
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• MSM7570
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