1

DATASHEET

Low Noise, Low Power, 100 Taps, Digitally Controlled

Potentiometer (XDCP™)

X9317

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.

Applications

•LCD bias control

• DC bias adjustment

• Gain and offset trim

• Laser diode bias control

• Voltage regulator output control

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

- Standby current <5µA

• High reliability

- Endurance, 100,000 data changes per bit

- Register data retention, 100 years

•Packages

- 8 Ld SOIC, TSSOP, and MSOP

• Pb-free (RoHS compliant)

UP/DOWN

COUNTER

7-BIT

NONVOLATILE

MEMORY

STORE AND

RECALL

CONTROL

CIRCUITRY

ONE

OF

ONE

DECODER

RESISTOR

ARRAY

U/D

INC

CS

WIPER

SWITCHES

HUNDRED

CONTROL

AND

MEMORY

UP/DOWN

(U/D)

INCREMENT

(INC)

DEVICE SELECT

(CS)

GENERAL

DETAILED

0

1

2

96

97

98

99

FIGURE 1. BLOCK DIAGRAM

November 4, 2014

FN8183.9

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2004, 2005, 2008, 2009, 2012, 2014. All Rights Reserved

Intersil (and design) and XDCP are trademarks owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.