¡ Semiconductor

MSM7508B/7509B

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¡ Semiconductor

MSM7508B/7509B

Single Rail CODEC

GENERAL DESCRIPTION

The MSM7508B and MSM7509B are single-channel CODEC CMOS ICs for voice signals ranging

from 300 to 3400 Hz. These devices contain filters for A/D and D/A conversion.

Designed especially for a single-power supply and low-power applications, these devices are

optimized for telephone terminals in ISDN and digital wireless systems.

The MSM7508B/MSM7509B are the transmission-clocks extended versions of the MSM7508/

MSM7509. It is recommended to use the MSM7508/MSM7509 for the transmission clocks of 64,

128, 256kHz.

FEATURES

• Single power supply: +5 V

±5%

• Low power consumption

Operating mode:

17.5 mW Typ.

37 mW Max.

Power down mode:

1.5 mW Typ.

3 mW Max.

• ITU-T Companding law

MSM7508B:

m-law

MSM7509B:

A-law

• Built-in PLL eliminates a master clock

• Transmission clock:

64/128/256/512/1024/2048 kHz

96/192/384/768/1536/1544/200 kHz

• Adjustable transmit gain

• Built-in reference voltage supply

• Package options:

16-pin plastic DIP (DIP16-P-300-2.54-W1)

(Product name : MSM7508BRS)

(Product name : MSM7509BRS)

24-pin plastic SOP (SOP24-P-430-1.27-K)

(Product name : MSM7508BGS-K)

(Product name : MSM7509BGS-K)

28-pin plastic QFJ (PLCC) (QFJ28-P-S450-1.27) (Product name : MSM7508BJS)

(Product name : MSM7509BJS)

Note:

The product names are indicated in PIN CONFIGURATION.

E2U0013-28-81

This version: Aug. 1998

Previous version: Nov. 1996