SM7153 datasheet(2/9 Pages) SAMHOP

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Page 2

PIN DESCRIPTION

Symbol

Description

L-OUT1

R-OUT1

10dB/step attenuator outputs.

A signal applied to IN is attenuated in 7 steps

from 0dB to 60dB at 10dB/step.

L-IN1

R-IN1

10dB/step attenuator inputs

INH

Inhibit terminal.

When this terminal is at ' L ' level, all input/

output cut off and the SM7153 is placed in the

inhibit state.

When at ' H ' level, the SM7153 operates

normally.

DCO

DC current output for displaying attenuation.

OSC

C, R connecting terminal for the oscillator.

up/down speed of attenuation is decided by

the attenuation up/down control oscillator

according to this time constant.

A-GND

Analog ground terminal

L-IN2

R-IN2

2 dB/step attenuator inputs

L-OUT2

R-OUT2

2 dB/step attenuator inputs

A signal applied to IN is attenuated in 5 steps

from 0dB to 8dB at 2 dB/step.

VSS

Negative Power Supply

U/D

Attenuation up/down control input terminal.

When this terminal is at ' H ' level, sound

volume is increased synchronising with rise of

the oscillator. Conversely, when this pin is at '

L ' level, sound volume is decreased.

VDD

Positive Power Supply (Substrate)

V.1.0

SM7153

SAMHOP Microelectronics Corp.

三合微科股份有限公司

ELECTRONIC VOLUME

CONTROLLER

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