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DATASHEET

Single Supply/Low Power/256-Tap/2-Wire Bus Quad

Digitally-Controlled (XDCP™) Potentiometers

X9259

The X9259 integrates four digitally controlled potentiometers

(XDCP) on a monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with

a combination of resistor elements and CMOS switches. The

position of the wipers are controlled by the user through the

2-wire bus interface. Each potentiometer has associated with

it a volatile Wiper Counter Register (WCR) and four nonvolatile

Data Registers that can be directly written to and read by the

user. The content of the WCR controls the position of the wiper.

At power-up, the device recalls the content of the default Data

Registers of each DCP (DR00, DR10, DR20, and DR30) to the

corresponding WCR.

The XDCP 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, and

signal processing.

Features

• Four separate potentiometers in one package

• 256 resistor taps–0.4% resolution

• 2-wire serial interface for write, read, and

transfer operations of the potentiometer

• 4 nonvolatile data registers for each potentiometer

• Nonvolatile storage of multiple wiper positions

• Standby current <5µA max

• 50kΩ version of total resistance

• Endurance: 100,000 data changes per bit per register

• 100 year data retention

• Single supply version of X9258

• 24 Ld SOIC, 24 Ld TSSOP

•Low power CMOS

• Pb-Free (RoHS compliant)

Functional Diagram

POWER UP,

INTERFACE

CONTROL

AND

2-WIRE

DCP0

A1

SDA

SCL

A3

A2

WP

WCR0

DR00

DR01

DR02

DR03

DCP1

WCR1

DR10

DR11

DR12

DR13

DCP2

WCR2

DR20

DR21

DR22

DR23

DCP3

WCR3

DR30

DR31

DR32

DR33

A0

INTERFACE

STATUS

December 12, 2014

FN8169.6

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

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

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.