The Intersil X9318 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface. The potentiometer is implemented by a resistor array composed of 99 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation. The device can be used as a three-terminal potentiometer for voltage control or as a two-terminal variable resistor for current control in a wide variety of applications.


  • Solid-state potentiometer
  • 3-wire serial interface
  • Terminal voltage, 0 to +8V
  • 100 wiper tap points
  • Wiper position stored in nonvolatile memory and recalled on power-up
  • 99 resistive elements
  • Temperature compensated
  • End to end resistance range ± 20%
  • Low power CMOS
  • VCC = 5V
  • Active current, 3mA max.
  • Standby current, 1mA max.
  • High reliability
  • Endurance, 100,000 data changes per bit
  • Register data retention, 100 years
  • RTOTAL value = 10kΩ
  • Packages
  • 8 Ld SOIC and DIP
  • Pb-free plus anneal available (RoHS compliant)




  • LCD bias control
  • DC bias adjustment
  • Gain and offset trim
  • Laser diode bias control
  • Voltage regulator output control


Design & Development

Software & Tools

Software Downloads

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Library EXE 2.56 MB
1 item