CAT5269WI00 datasheet(1/16 Pages) ONSEMI

Part #	CAT5269WI00

Description	Dual Digitally Programmable Potentiometers (DPP?? with 256 Taps and 2-wire Interface

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CAT5269

1

Doc. No. MD-2123 Rev. F

Characteristics subject to change without notice

Dual Digitally Programmable Potentiometers

(DPP™) with 256 Taps and 2-wire Interface

FEATURES

Four linear taper digitally programmable

potentiometers

256 resistor taps per potentiometer

End to end resistance 50 kΩ or 100 kΩ

Potentiometer control and memory access via

2-wire interface (I

2C like)

Low wiper resistance, typically 100 Ω

Nonvolatile memory storage for up to four

wiper settings for each potentiometer

Automatic recall of saved wiper settings at

power up

2.5 to 6.0 volt operation

Standby current less than 1 µA

1,000,000 nonvolatile WRITE cycles

100 year nonvolatile memory data retention

24-lead SOIC and TSSOP packages

Industrial temperature range

For Ordering Information details, see page 15.

PIN CONFIGURATION

SOIC (W)

TSSOP (Y)

NC

1

24 A3

A0

2

23 SCL

NC

3

22 NC

NC

4

21 NC

NC

5

20 NC

NC

6

19 NC

VCC 7

18 GND

RLO 8

17 RW1

RHO 9

16 RH1

RWO 10

15 RL1

A2 11

14 A1

WP

¯¯¯ 12

13 SDA

DESCRIPTION

The CAT5269 is two digitally programmable poten–

tiometers (DPPs™) integrated with control logic and

18 bytes of NVRAM memory. Each DPP consists of a

series of resistive elements connected between two

externally accessible end points. The tap points

between each resistive element are connected to the

wiper outputs with CMOS switches. A separate 8-bit

control register (WCR) independently controls the

wiper tap switches for each DPP. Associated with

each wiper control register are four 8-bit non-volatile

memory data registers (DR) used for storing up to four

wiper settings. Writing to the wiper control register or

any of the non-volatile data registers is via a 2-wire

serial bus. On power-up, the contents of the first data

register (DR0) for each of the four potentiometers is

automatically loaded into its respective wiper control

registers.

The CAT5269 can be used as a potentiometer or as a

two terminal, variable resistor. It is intended for circuit

level or system level adjustments in a wide variety of

applications. It is available in the -40ºC to 85ºC

industrial operating temperature ranges and offered in

a 24-lead SOIC and TSSOP package.

FUNCTIONAL DIAGRAM

RW0

RW1

RH0

A1

A2

A0

A3

RH1

RL0

RL1

NONVOLATILE

DATA

REGISTERS

WIPER

CONTROL

REGISTERS

CONTROL

LOGIC

2-WIRE BUS

INTERFACE

WP

SCL

SDA

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