SILAN SC9153A

Silan
Semiconductors SC9153A
ELECTRONIC VOLUME CONTROLLER
DESCRIPTION
The SC9153A is CMOS IC which has been designed for
electronization volume control of audio equipment,etc.
FEATURES
*Wide operating voltage range(VDD=6V ~ 12V)
*Low current comsumption .
*Attenuation can be controlled from 0dB to –66dB 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
10
OSC
9
L-OUT1
2
L-IN1
3
U/D 7 Bits Bidirectional
shift registor
CK
VDD
A-SW
A-SW
5
CK
A-SW
8
DCO
14
R-IN1
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
A-SW
13 A-GND
CK
CK
A-SW
A-SW
A-SW
A-SW
6 Bits Latch Circuit
A-SW
6 Bits Latch Circuit
A-SW
A-SW
A-SW
L-OUT2
7 INH
15 R-OUT1
CK
7 Bits Latch Circuit
A-SW
4
Auto Initialize
Circuit
Constant
Current
Circuit
A-SW
L-IN2
U/D 6 Bits Bidirectional
shift registor
CK
OSC
A-SW
A-GND
INT
7 Bits Latch Circuit
U/D
12
R-IN2
A-SW
A-SW
A-SW
A-SW
6
11 R-OUT2
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
1
2000.12.31
Silan
Semiconductors SC9153A
PIN CONFIGURATION
Vss 1
16 VDD
L-OUT1 2
15 R-OUT1
L-IN1 3
14 R-IN1
A-GND 4
13 A-GND
SC9153A
L-IN2 5
12
L-OUT2 6
R-IN2
11 R-OUT2
INH 7
10
U/D
DCO 8
9
OSC
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage(Pin 16)
Input/Output Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
Value
Unit
VDD
VIN
PD
Topr
Tstg
13.0
Vss-0.3V ~ VDD+0.3V
150
-30 ~ +75
-55 ~ +125
V
V
mW
°C
°C
ELECTRICAL CHARACTERISTICS
(Tamb=25°C,VDD=12.0V, VSS=0V, Unless otherwise specified)
Parameter
Operating Supply Voltage
Operating supply current
“H” Level
Input Voltage
“L” Level
Backup current
Attenuator 1 (10dB/step) resistor
Attenuator 2 (2dB/step) resistor
Attenuator Error
Maximum Input Amplitude
Total Harmonic Distortion
DCO output current
Oscillation frequency
Symbol
VDD
IDD
VIH
VIL
IB
RATT-1
RATT-2
Vin
THD
IDCO
fOSC
Test conditions
Min
6
INH,U/D
VDD=4V,INH=”L”
R-IN1(L-IN1) ~ A-GND
R-IN2(L-IN2) ~ A-GND
Biase VDD/2=6V
ATT=-10dB, fin=1kHz,
Vin=1.0Vp-p
1 step
0.8*VDD
Vss-0.3
25
10
70
5
Typ
Max
Unit
12
V
1
3
mA
VDD+0.3
V
0.2*VDD
µA
10
kΩ
50
70
kΩ
20
28
2
dB
4.0
Vrms
0.005
0.01
%
100
µA
Hz
140
10k
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2
2000.12.31
Silan
Semiconductors SC9153A
FUNCTIONAL DESCRIPTION OF EACH TERMINAL
Terminal
No.
2,15
3,14
4,13
Symbol
L-OUT1,
R-OUT1
L-IN1,
R-IN1
A-GND
7
L-IN2,
R-IN2
L-OUT2,
R-OUT2
INH
8
DCO
5,12
6,11
Function
10dB/step attenuator outputs. A signal applied to IN is
attenuated in 7 steps from 0dB to 60dB at 10dB/step.
10dB/step attenuator inputs
Remarks
L and R are symmetrical.
Out1
IN1
Analog ground terminal
AGND
2dB/step attenuator inputs
IN2
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
Out2
Attenuation can be
converted to DC voltage
by attaching a resistor
between this terminal and
Vss.
13 steps
~
~
∞
9
10
1
16
OSC
U/D
VSS
VDD
R,C connecting terminal or the oscillator. Up/down speed
of attenuation is decided by the attenuation up/down
control oscillator according to this time constant.
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
“L” level, sound volume is decreased.
VDD
OSC
U/D
(-) Power supply terminal
(+) Power supply terminal
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
3
2000.12.31
Silan
Semiconductors SC9153A
DESCRIPTION OF OPERATION
1. SETTING OF ATTENUATION
On the SC9153A, attenuation can be increased/decreased according to the stae of U/D terminal ”H” or “L”
level ) by actuating the build-in oscillator. The attenuation is automatically set at the -40dB positions when power is
applied.
Power
Supply
U/D
OSC
-30dB
-32dB
-34dB
-36dB
-38dB
-40dB
VDD
When the UP key is pressed after power ON,
the U/D terminal is place in the UP state at “H”
level, and the oscillator is actuated. When the
DOWN key is pressed, the U/D terminal is kept
at “L” level as long as the Down key is pressed,
and the oscillator is actuated in the down state
and therefore, attenuation is decreased.
Oscillation frequency is decided by Cx and Rx.
Fosc=1/(0.7*Rx*Cx) (Hz)
Cx
16
Rs
OSC
9
Rx
U/D
UP
(Rs>3Rx)
10
Rx=33kΩ
Cx=4.7µF
Rs=100kΩ
Down
2.2µF
Vss
2.ATTENUATION DISPLAY OUTPUT
The SC9153A is provided with DC current output terminal for displaying attenuation. With 0dB ~ ∝ divided in to
13steps, current of approx 100µA/step is transmitted.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
4
2000.12.31
Silan
Semiconductors STEP
DCO
0
1
2
3
4
5
6
7
8
9
10
11
12
13
0
IDCO=100µA±30µA
2 × IDCO
3 × IDCO
4 × IDCO
5 × IDCO
6 × IDCO
7 × IDCO
8 × IDCO
9 × IDCO
10 × IDCO
11 × IDCO
12 × IDCO
13 × IDCO
SC9153A
ATTENUATION
REMARKS
-64dB ~ ∝
-60dB ~ -62dB
-54dB ~ -58dB
-50dB ~ -52dB
-44dB ~ -48dB
-40dB ~ -42dB
-34dB ~ -38dB
-30dB ~ -32dB
-24dB ~ -28dB
-20dB ~ -22dB
-14dB ~ -18dB
-10dB ~ -12dB
-4dB ~ -8dB
0dB ~ -2dB
13
12
8
11
1kΩ
10
Vss
9
8
About
1.3V
7
6
5
4
3
2
Step 0
1 Step is about 100mV±30mV
1
3.ATTENUATOR
The attenuator unit consist of diffused resistors and analog switches. Attenuator-1 attenuates 0 ~ 60dB at
10dB/step while Attenuator-2 attenuates 2~8db at 2dB/step, a total of 0~ 66dB at 2dB/step.
Buffer
IN1
0
OUT1
R1
0
IN2
OUT2
R2
-10
-2
R1
R2
-20
-4
R1
R2
-30
-6
R1
R2
-40
-8
R1
R2
-50
R1
Attenuator-2
-60
R1
A-GND
-∞
Attenuator-1
R1=50kΩ(typical)
R2=20kΩ(typical)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
5
2000.12.31
Silan
Semiconductors SC9153A
VDD
VDD
If there is possibility for excessive voltage being to the
attenuator, it is recommended to insert a protected diode as
illustrated below.
IN1
Vss
Vss
4.POWER SUPPLY
DUAL POWER SUPPLY
+VDD
OSC
U/D
VDD
A-GND
U/D
OSC
0
SC9153A
VSS
INH
UP
DOWN
DCO
-VSS
DC
VDD
SINGLE POWER SUPPLY
+VDD
OSC
U/D
VDD
A-GND
U/D
OSC
0
SC9153A
VSS
INH
UP
DOWN
DCO
VSS (0V)
DC
VDD
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
6
2000.12.31
Silan
Semiconductors SC9153A
5.BACKUP WHEN POWER OFF
If VDD-VSS drops below 4.0V, the backup
becomes impossible.
16
VDD
7
INH
1
VSS
10KΩ
10KΩ
+B
51KΩ
On the SC9153A, when the INH terminal is set
at “L” level, all input/output terminal are shut off
and current consumption is reduced to the
minimum. The backup by means of a capacitor
become possible in this condition. An example
of application, when a backup capacitor is
used, is shown right.
1000µF
16V
-VSS
6.INITIALIZATION WHEN POWER ON
The SC9153A has the auto-initializating built-in
for initialization at time of power ON. As the
initializing system through detection of supply
voltage level is adopted., if rise power supply is
too fast, the initialization may not be fully
effected.(No external initialization is
necessary. )In addition for effective initialization,
it is necessary that the INH terminal is raised
simultaneously with supply voltage. Further, the
initializating level is –40dB.
It is recommended to rise supply voltage and the
INH terminal as illustrated below. If the VDD-VSS
drops below 4.0V, the auto-initializing function is
actuated.
VDD-VSS or INH
Terminal
Voltage
VDD-VSS=4.0V
T>1ms
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
7
2000.12.31
Silan
Semiconductors SC9153A
APPLICATION CIRCUIT (L-CH ONLY)
470kΩ
VDD= +6V
10µF
0.012µF
1µF
10µF
2700pF
0.01µF
82kΩ
1µF
27kΩ
5.6kΩ
27pF
10µF
560kΩ
680Ω
120kΩ
UTC4558
2
15
2
15
3
14
3
14
4
13
4
13
5
12
5
6
11
6
10
7
1µF
Output
1
16
2
15
3
14
4
13
12
5
12
11
6
11
10
7
0.068µF
16
4.7kΩ
1
39kΩ
16
0.022µF
Input
1
1.2kΩ
VSS= -6V
1µF
VOLUME
TREBLE
2.2µF
9
+
+
8
2.2µF
9
2.2µF
8
Down
9
UP
8
10
SC9153A
SC9153A
_
SC9153A
_
7
BASS
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
8
2000.12.31
Silan
Semiconductors SC9153A
PACKAGE OUTLINE
DIP-16-300-2.54
UNIT:mm
7.62
6.40
0.25
2.54
1.50
15 degree
3.30
5.08
3.51
19.4
0.46
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
9
2000.12.31