DS1866
Log Trimmer Potentiometer
www.dalsemi.com
FEATURES
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Single 8-position Log Trimmer Potentiometer
5-dB/step
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Operates from 2.7V to 5.5V supplies
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Parallel interface control: P0, P1, P2
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Standard Resistance Value: 10 kΩ
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8-pin DIPs; 8-pin (150) SOICs
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Operating Temperature Range:
- Industrial: -40°C to +85°C
PIN ASSIGNMENT
P0
P1
H
GND
1
2
3
4
8
7
6
5
V
CC
P2
L
W
8-Pin DIP (300-mil)
See Mech. Drawings Section
P0
P1
H
GND
1
2
3
4
8
7
6
5
V
CC
P2
L
W
8-Pin SOIC (150-mil)
See Mech. Drawings Section
PIN DESCRIPTION
H
L
W
V
CC
P0
P1
P2
GND
- High End of Resistor
- Low End of Resistor
- Wiper Terminal
- 3V or 5V Power Supply Input
- Position Select - Bit 0
- Position Select - Bit 1
- Position Select - Bit 2
- Ground
DESCRIPTION
The DS1866 Log Trimmer Potentiometer is a single volatile digital potentiometer having eight positions
with a 5-dB resolution per step. The device provides an ideal method for low-cost trimming or volume
control using a CPU or manual control input. The device’ wiper position is set to one of eight positions
s
by a 3-terminal parallel port. The value of the wiper position is determined by the P0, P1, and P2 port
pins.
The DS1866 is available as a 10k potentiometer and is available in an industrial temperature grade.
Additionally, the DS1866 will operate from 3V or 5V supplies and is ideal for portable applications
requiring low standby current. Two packaging options are available and include the 8-pin (300-mil) DIP,
8-pin (150-mil) SOIC.
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102199
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