DS1866Log Trimmer Potentiometerwww.dalsemi.comFEATURESPIN ASSIGNMENT § Single 8-position Log Trimmer Potentiometer 5-dB/step P0 1 8 VCC § Operates from 2.7V to 5.5V supplies P1 2 7 P2 § Parallel interface control: P0, P1, P2 H 3 6 L § Standard Resistance Value: 10 kΩ GND 4 5 W § 8-pin DIPs; 8-pin (150) SOICs 8-Pin DIP (300-mil) § Operating Temperature Range: See Mech. Drawings Section - Industrial: -40°C to +85°C P0 1 8 VCC P1 2 7 P2 H 3 6 L GND 4 5 W 8-Pin SOIC (150-mil) See Mech. Drawings Section PIN DESCRIPTION H - High End of Resistor L - Low End of Resistor W - Wiper Terminal VCC - 3V or 5V Power Supply Input P0 - Position Select - Bit 0 P1 - Position Select - Bit 1 P2 - Position Select - Bit 2 GND - 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’s wiper position is set to one of eight positions 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. 1 of 5 102199
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