X93256
Dual Digitally Controlled Potentiometers (XDCPs™)

Key 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 V_CC
• Low power CMOS
• V_CC = 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
• R_TOTAL value = 12.5kΩ, 50kΩ
• Package
• 14 Ld TSSOP
• Pb-free available (RoHS compliant)

Description

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