The X9Cxxx are Xicor digitally-controlled (XDCP) potentiometers. The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a three-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 or as a two-terminal variable resistor in a wide variety of applications including:

Applications:

• control 
• parameter adjustments 
• signal processing

Features:

• Solid-State Potentiometer
• Three-Wire Serial Interface
• 100 Wiper Tap Points

—Wiper Position Stored in Nonvolatile Memory and Recalled on Power-up

• 99 Resistive Elements

—Temperature Compensated

—End to End Resistance, ±20%

—Terminal Voltages, ±5V

• Low Power CMOS

—VCC = 5V

—Active Current, 3mA Max.

—Standby Current, 500µA Max.

• High Reliability

—Endurance, 100,000 Data Changes per Bit —Register Data Retention, 100 Years

• X9C102 = 1 kW
• X9C103 = 10 kW
• X9C503 = 50 kW
• X9C104 = 100 kW

Package: PDIP-8

Datasheet: http://www.farnell.com/datasheets/18974.pdf