Rainbow Electronics DS1802 - Manual

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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