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The Intersil X93156 is a three-terminal 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 an Up/Down interface.

The potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. 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 a nonvolatile memory and then be recalled upon a subsequent power-up operation.

The device can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including the programming of bias voltages, LCD brightness and contrast control as well as the implementation of ladder networks.

Key Features

• Solid-state potentiometer
• Up/Down interface
• 32 wiper tap points
  • Wiper position stored in nonvolatile memory and recalled on power-up
• 31 resistive elements
  • Temperature compensated
  • Maximum resistance tolerance of ±25%
  • Terminal voltage, 0 to VCC
• Low power CMOS
  • VCC = 2.7V to 5.5V
  • Active current, 200µA typ.
  • Standby current, 2µA max.
• High reliability
  • Endurance 200,000 data changes per bit
  • Register data retention, 100 years
• RTOTAL value = 12.5kΩ, 50kΩ
• Package
  • 8 Ld MSOP
  • Pb-free Available (RoHS compliant)