The Intersil X9317 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.

Features

• Solid-state potentiometer

• 3-wire serial up/down 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 range ±20

• Low power CMOS

- VCC = 2.7V to 5.5V, and 5V ±10

- Standby current <5µA

• High reliability

- Endurance, 100,000 data changes per bit

- Register data retention, 100 years

• RTOTAL values = 10kΩ, 50kΩ, 100kΩ

• Packages

- 8 Ld SOIC, TSSOP, and MSOP

• Pb-free (RoHS compliant)

Applications

• LCD bias control

• DC bias adjustment

• Gain and offset trim

• Laser diode bias control

• Voltage regulator output control