Rainbow Electronics DS1802 User Manual
Ds1802, Features, Pin assignment

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051401
FEATURES
§ Ultra-low power consumption
§ Operates from 3V or 5V supplies
§ Two digitally controlled, 65-position
potentiometers including mute
§ Logarithmic resistive characteristics (1 dB
per step)
§ Zero-crossing detection eliminates noise
caused by wiper movement
§ Digital or mechanical pushbutton wiper
control
§ Serial port provides means for setting and
reading both potentiometers wipers
§ 20-pin SOIC and 20-pin TSSOP for surface
mount applications
§ Operating Temperature Range:
-40
°
C to +85
°
C
§ Software and hardware mute
§ Resistance Available: 45 k
Ω
PIN ASSIGNMENT
PIN DESCRIPTION
L0, L1
- Low End of Resistor
H0, H1
- High End of Resistor
W1,W2
- Wiper End of Resistor
V
CC
- 3V/5V Power Supply Input
RST
- Serial Port Reset Input
D
- Serial Port Data Input
CLK
- Serial Port Clock Input
MODE
- Mode Select Input
UC0, UC1
- Up Control Pushbutton Inputs
DC0, DC1
- Down Control Pushbutton
Inputs
VU, VD
- Volume-Up/Volume-Down
Inputs
B0, B1
- Balance Pot-0, Pot-1 Inputs
GND
- Digital Ground
MUTE
- Mute
AGND
- Analog Ground
ZCEN
- Zero-Crossing Detect Input
C
OUT
- Cascade Output
DS1802
Dual Audio Taper Potentiometer
With Pushbutton Control
www.dalsemi.com
GND
1
20
VCC
COUT
2
19
VU (UC1)
CLK
3
18
VD (DC1)
D
4
17
B0 (UC0)
RST
5
16
B1 (DC0)
ZCEN
6
15
MUTE
MODE
7
14
AGND
W 0
8
13
H1
L0
9
12
L1
H0
10
11
W1
20-Pin DIP (300-mil)
20-Pin SOIC (300-mil)
20-Pin TSSOP (173-mil)
See Mech. Drawings Section