The Intersil X93256 is a dual digitally controlled
potentiometer (XDCP). The device consists of two resistor
arrays, wiper switches, a control section, and nonvolatile
memory. The wiper positions are controlled by individual
Up/Down interfaces.
A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. The position of each wiper element is controlled by
a set of independent 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.
Each potentiometer is connected as a three-terminal
variable resistor and can be used in a wide variety of
applications including:
• Bias and Gain Control
• LCD Contrast Adjustment

Features
• Dual solid-state potentiometers
• Individual Up/Down interfaces
• 32 wiper tap points per potentiometer
- Wiper position stored in nonvolatile memory and
recalled on power-up
• 31 resistive elements per potentiometer
- Temperature compensated
- Maximum resistance tolerance of ±25%
- Terminal voltage, 0 to VCC
• Low power CMOS
- VCC = 2.7V to 5.5V.
- Active current, 200µA typical per potentiometer
- Standby current, 4µA max per potentiometer
• High reliability
- Endurance 200,000 data changes per bit
- Register data retention, 100 years
• RTOTAL value = 12.5kΩ, 50kΩ
• Package
- 14 Ld TSSOP
• Pb-free available (RoHS compliant)