MOSA

MS6257

GAIN AND ATTENUATION VOLUME CONTROLLER IC

REV 1

1

www.mosanalog.com

Gain and Attenuation Volume Controller IC

One Set of Stereo Input, Low voltage

Gain and Attenuation 15~-79dB

FEATURES

‧Operation range: 2.7V~5.5V

‧Low power consumption

‧Gain/Attenuation: 15dB to –79dB at 1dB/step

‧Housed in 8 pin SOP package

‧I

APPLICATIONS

‧Multimedia system

‧Hi-Fi audio system

‧MP3, PDA

‧Cross-reference PT2257, PT2259

DESCRIPTION

The MS6257 is the stereo audio volume controller IC. It uses CMOS technology specially for the low voltage

application with low noise, rail-to-rail output. The MS6257 provide an I

range of 15dB to –79dB, 1dB/step. The initial condition is set to be maximum attenuation –79dB and mute on mode

when the power is up.

PIN CONFIGURATION

Symbol

Pin

Description

L-IN

1

Left channel input

L-OUT

2

Left channel output

3

Ground

SDA

4

I

SCL

5

I

6

Positive supply voltage

R-OUT

7

Right channel output

R-IN

8

Right channel input

7

6

5

8

2

3

4

1

MS6257

R-IN

R-OUT

SCL

L-IN

L-OUT

SDA

BLOCK DIAGRAM

R-IN

REF

SDA

SCL

R-OUT

L-OUT

I2C Interface

-10dB/STEP

-1dB/STEP

1dB/STEP

Serial Bus Decoder and Latches

Reference

Circuit

1dB/STEP

-1dB/STEP

-10dB/STEP

L-IN