X9448WP24 INTERSIL [Intersil Corporation], X9448WP24 Datasheet

X9448WP24

Manufacturer Part Number

X9448WP24

Description

Mixed Signal with 2-Wire Interface

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.X9448WP24.pdf (19 pages)

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Dual Digitally Controlled Potentiometer

(XDCP™) & Voltage Comparator

FEATURES

• Two digitally controlled potentiometers and two

• 2-wire serial interface

• Register oriented format

• Fast response comparator

• Enable, latch, or shutdown comparator outputs

• Auto-recall of WCR and ACR data from R0

• Hardware write protection, WP

• Separate analog and digital/system supplies

• Direct write cell

• 16-bytes of EEPROM memory

• Power saving feature and low noise

• Two 10kΩ or two 2.5kΩ potentiometers

• Resolution: 64 taps each pot

• 24-lead TSSOP and 24-lead SOIC packages

BLOCK DIAGRAM

voltage comparators in one package

—Direct read/write wiper position

—Store as many as four positions per pot

through ACR

—Endurance–100,000 data changes per bit per

—Register data retention–100 years

SDA

SCL

Interface

Circuitry

Control

and

Data Sheet

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

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

-R

)

0,1

)

0,1

DESCRIPTION

The X9448 integrates two nonvolatile digitally con-

trolled potentiometers (XDCP) and two voltage com-

parators on a CMOS monolithic microcircuit.

The X9448 contains two resistor arrays, each com-

posed of 63 resistive elements. Between each ele-

ment and at either end are tap points accessible to the

wiper elements. The position of the wiper element on

the array is controlled by the user through the two wire

serial bus interface.

Each potentiometer has an associated voltage com-

parator. The comparator compares the external input

voltage V

put voltage level to a logic high or low.

Each resistor array and comparator has associated

with it a wiper counter register (WCR), analog control

be directly written and read by the user. The contents

of the wiper counter register controls the position of

the wiper on the resistor array. The contents of the

analog control register controls the comparator and its

output. The potentiometer is programmed with a

2-wire serial interface.

WCR

ACR

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

April 18, 2005

Mixed Signal with 2-Wire Interface

0,1

Intersil (and design) is a registered trademark of Intersil Americas Inc.

with the wiper voltage V

–

H (0,1)

L (0,1)

W (0,1)

NI (0,1)

OUT (0,1)

and sets the out-

X9448

FN8201.0

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