Silan
Semiconductors
ELECTRONIC VOLUME CONTROLLER
DESCRIPTION
The SC9153A is CMOS IC which has been designed for
electronization volume control of audio equipment,etc.
SC9153A
FEATURES
*Wide operating voltage range(V
DD=
6V ~ 12V)
*Low current comsumption .
*Attenuation can be controlled from 0dB to 鈥?6dB by 2dB/step
*Both of dual power suppliers of (+) and (-) and a single power
supply can be used.
*Be capable of controlling attenuation by means of the built-in
oscillator and the up/down terminals.
DIP-16
BLOCK DIAGRAM
VDD
VSS
16
1
INT
Auto Initialize
Circuit
U/D
10
U/D 7 Bits Bidirectional
shift registor
CK
OSC
INT
U/D 6 Bits Bidirectional
shift registor
CK
7
INH
OSC
9
Constant
Current
Circuit
VDD
CK
CK
8
DCO
L-OUT1
L-IN1
2
3
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
15
R-OUT1
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
14
R-IN1
7 Bits Latch Circuit
A-GND
L-IN2
4
CK
CK
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
7 Bits Latch Circuit
13
A-GND
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
5
12
R-IN2
6 Bits Latch Circuit
L-OUT2
6
6 Bits Latch Circuit
11
R-OUT2
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
1