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E2U0027-28-83

隆 Semiconductor

MSM7540L/7560L

隆 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

鈥?Single 3 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

32 kbps to 2048 kbps

鈥?Serial ADPCM Transmission Data Rate :

64 kbps to 2048 kbps

鈥?Serial PCM Transmission Data Rate :

鈥?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

鈥?Low Power Consumption

Operating Mode :

18 mW Typ. (V

DD

= 3.0 V)

Power-Down Mode :

0.3 mW Typ. (V

DD

= 3.0 V)

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: MSM7540LGS-K)

(Product name: MSM7560LGS-K)

32-pin plastic TSOP (TSOPI32-P-814-0.50-1K) (Product name: MSM7560LTS-K)

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