1

®

FN8202.0

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

1-888-INTERSIL or 321-724-7143

XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004. All Rights Reserved

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

X9455

Dual Two-wiper Digitally-Controlled

(XDCP™) Potentiometer

The X9455 integrates 2 digitally controlled potentiometers

(XDCP), each one with dual wipers, on a monolithic CMOS

integrated circuit.

The digitally controlled potentiometer is implemented using

255 resistive elements in a series array. Between each

element are tap points connected to wiper terminals through

switches. The position of each wiper on the array is

controlled by the user through the U/D or 2-wire bus

interface. Each potentiometer wiper has associated with it

two volatile Wiper Counter Register (WCR) and each WCR

has associated with it four non-volatile Data Registers that

can be directly written to and read by the user. The contents

of the WCR controls the position of the wiper on the resistor

array though the switches. The contents of the default data

registers (DR0A0, DR0B0, DR1A0, DR1B0) are loaded into

the WCR on power up.

The DCP can be used as a four-terminal potentiometer in a

wide variety of applications including the programming of

bias voltages, window comparators, and three resistor

programmable networks.

Features

• Dual Two-wiper solid state potentiometer

• 256 Resistor tap points-0.4% resolution

• 2-wire serial interface for Write, Read, and

transfer operations of the potentiometer

• Up/Down interface for individual potentiometer wipers

• Wiper resistance, 40

Ω typical

• Non-volatile storage of wiper positions

• Power On Recall Loads saved wiper position on Power

Up.

• Standby Current < 20µA Max

• Maximum Wiper Current: 3mA

•2.8k

Ω,10kΩ, 50kΩ, 100kΩ version of total pot resistance

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

• 100 yr. data retention

• 24-Lead TSSOP

Pinout

X9455

(24-LD TSSOP)

TOP VIEW

Ordering Information

PART NUMBER

RTOTAL

PACKAGE

OPERATING

TEMP RANGE

(°C)

X9455YV24-2.7

2.8k

Ω

24-lead TSSOP

0 to 70

X9455YV24I-2.7

2.8k

Ω

24-lead TSSOP

-40 to +85

X9455WV24-2.7

10k

Ω

24-lead TSSOP

0 to 70

X9455WV24I-2.7

10k

Ω

24-lead TSSOP

-40 to +85

X9455UV24-2.7

50k

Ω

24-lead TSSOP

0 to 70

X9455UV24I-2.7

50k

Ω

24-lead TSSOP

-40 to +85

X9455TV24-2.7

100k

Ω

24-lead TSSOP

0 to 70

X9455TV24I-2.7

100k

Ω

24-lead TSSOP

-40 to +85

RH1

NC

RW1A

1

2

3

4

5

6

7

14

20

19

18

17

16

15

X9455

DS0

DS1

A0

RW0B

U/D

NC

SCL

RL1

Vss

NC

RW0A

CS

RH0

RL0

RW1B

NC

Vcc

8

9

10

13

WP

A2

11

12

SDA

A1

24

23

22

21

Data Sheet

November 10, 2004