1

®

FN8188.0

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

1-888-INTERSIL or 1-888-352-6832

XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved

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

X93256

Dual Digitally Controlled Potentiometers

(XDCPs™)

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%

• Low power CMOS

—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

• Packages

—14-lead TSSOP

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

BLOCK DIAGRAM

5-Bit

Up/Down

Counter

5-Bit

Nonvolatile

Memory

Store and

Recall

Control

Circuitry

One

of

Decoder

Resistor

Array

Transfer

Gates

Thirty

General Description

Detailed Single Potentiometer Description

0

1

2

28

29

30

31

Two

Control

and

Memory

Up/Down

Increment

Device Select

30K

Data Sheet

March 4, 2005