1

®

FN8179.1

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

1-888-INTERSIL or 1-888-468-3774

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.

X9315

Low Noise, Low Power, 32 Taps

Digitally Controlled Potentiometer

(XDCP™)

The Intersil X9315 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 31 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:

• Control

• Parameter Adjustments

• Signal Processing

Features

• Solid-state potentiometer

• 3-wire serial interface

• 32 wiper tap points

- Wiper position stored in nonvolatile memory and

recalled on power-up

• 31 resistive elements

- Temperature compensated

- End to end resistance range ± 20%

• Low power CMOS

- Active current, 50/400µA max.

- Standby current, 1µA max.

• High reliability

- Endurance, 100,000 data changes per bit

- Register data retention, 100 years

• Packages

- 8 Ld SOIC, MSOP and PDIP

• Pb-free plus anneal available (RoHS compliant)

Block Diagram

5-Bit

Up/Down

Counter

5-Bit

Nonvolatile

Memory

Store and

Recall

Control

Circuitry

One

of

Decoder

Resistor

Array

U/D

INC

CS

Transfer

Gates

Thirty

Control

and

Memory

Up/Down

(U/D)

Increment

(INC)

Device Select

(CS)

General

Detailed

0

1

2

28

29

30

31

Two

Data Sheet

September 15, 2005