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BUY DS1669-50 https://www.utsource.net/itm/p/794278.html
Dallastat Electronic Digital Rheostat
Description: The DS1669 is a nonvolatile, digitally-controlled, potentiometer (DigiPot) from Dallas Semiconductor. Features: - 256 wiper positions - Low power consumption - Low voltage operation - End-to-end resistance of 50KΩ - Nonvolatile memory - Serial interface Applications: - Volume control - Trim adjustment - Sensor calibration - Gain control - Power supply adjustment (For reference only)