SC9153A データシートの表示（PDF） - Silan Microelectronics

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SC9153A

ELECTRONIC VOLUME CONTROLLER

Silan Microelectronics 

Silan

Semiconductors

SC9153A

FUNCTIONAL DESCRIPTION OF EACH TERMINAL

Terminal Symbol

Function

No.

2,15

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.

3,14

L-IN1,

R-IN1

10dB/step attenuator inputs

4,13

A-GND

Analog ground terminal

5,12

6,11

7

8

L-IN2,

R-IN2

L-OUT2,

R-OUT2

INH

DCO

2dB/step attenuator inputs

2dB/step attenuator outputs. A signal applied to IN is

attenuated in 5 steps from 0dB to 8dB at 2dB/step.

Inhibit terminal. When this terminal is at “L” level, all

input/output cut off and the SC9153A is placed in the

inhibit state. When at “H” level, the SC9153A operates

normally.

DC current output for displaying attenuation. Attenuation

0dB~∞ is divided into 13 steps and approx 100µA/step is

transmitted.

0dB

1step=100µA

Remarks

L and R are symmetrical.

Out1

IN1

A-

GND

IN2

Out2

Attenuation can be

converted to DC voltage

by attaching a resistor

between this terminal and

Vss.

13 steps

~~

∞

9

OSC

R,C connecting terminal or the oscillator. Up/down speed

VDD

of attenuation is decided by the attenuation up/down

control oscillator according to this time constant.

OSC

10

U/D

Attenuation terminal for oscillator. When this terminal is

at “H” level, sound volume is increased synchronizing

with rise of the oscillator. Conversely, when this pin is at

U/D

“L” level, sound volume is decreased.

1

VSS

(-) Power supply terminal

16

VDD

(+) Power supply terminal

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

3

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