OKI Semiconductor

FEDL7732-01-10

Issue Date: Nov. 2, 2005

MSM7732-01

Audio CODEC

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GENERAL DESCRIPTION

The MSM7732 is a single-channel full duplex CODEC CMOS IC which performs mutual transcoding between the

analog voice band signals and 64 kbps PCM serial data.

This device performs such functions as DTMF tone and several types of tone generation, transmit/receive data

mute and gain control, and side tone path.

FEATURES

· Single 3 V power supply operation

· PCM interface data format : µ-law/A-law/linear (2’s complement) selectable

· PCM interface timing : long frame synchronous timing/short frame synchronous timing

· Full-duplex single channel operation

· Serial PCM transmission data rate: 64 kbps to 2048 kbps

· Low power consumption

· Master clock frequency: 2.048 MHz

· Analog output stage

35 mW drive for receiver speaker (differential drive of 32

Ω)--Gain adjustable

66 mW drive for receiver speaker (differential drive of 30

Ω)--Gain adjustable

6.6 mW drive for earphone speaker (single drive of 32

Ω) --Gain adjustable

· Transmit/receive mute, transmit/receive programmable gain control

· Side tone path with programmable attenuation (8-step adjustment level)

· Built-in DTMF tone generator

· Built-in various ringing/function tone generator

· Built-in various ring back tone generator

· Serial MCU interface control: 3 bit

· Built-in transmit voice signal detector

· Built-in op amps and analog switches for various analog interface

· Package options :

30-pin plastic SSOP (SSOP30-P-56-0.65-K) (MSM7732-01 MB)

48-pin plastic TQFP (TQFP48-P-0707-0.50-K) (MSM7732-01 TB)

48-pin plastic LGA (P-TFLGA48-0707-0.8) (MSM7732-01 LB)

48-pin plastic BGA (P-LFBGA48-0707-0.8) (MSM7732-01 LA)