CAT5259YI-00 datasheet(1/16 Pages) ONSEMI

Part #	CAT5259YI-00

Description	Quad Digitally Programmable Potentiometers with 256 Taps and I짼C Interface

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CAT5259

1

Doc. No. MD-2000 Rev. I

Characteristics subject to change without notice

NONVOLATILE

DATA

REGISTERS

CONTROL LOGIC

WIPER CONTROL

REGISTERS

I²C BUS

INTERFACE

RW0

RW1

RW2

RW3

RL0

A0

A1

SCL

SDA

A2

A3

RL1

RL2

RL3

RH0

RH1

RH2

RH3

WP

Quad Digitally Programmable Potentiometers

(DPP™) with 256 Taps and I²C Interface

FEATURES

Four linear taper digitally programmable

potentiometers

256 resistor taps per potentiometer

End to end resistance 50kΩ or 100kΩ

Potentiometer control and memory access via

I²C interface

Low wiper resistance, typically 100Ω

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 1µA

1,000,000 nonvolatile WRITE cycles

100 year nonvolatile memory data retention

24-lead SOIC and 24-lead 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

RW3 3

22 RL2

RH3 4

21 RH2

RL3 5

20 RW2

NC

6

19 NC

VCC 7

18 GND

RLO 8

17 RW1

RHO 9

16 RH1

RWO 10

15 RL1

A2 11

14 A1

12

13 SDA

DESCRIPTION

The CAT5259 is four digitally programmable poten–

tiometers (DPPs™) integrated with control logic and

16 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 I²C 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 CAT5259 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 0ºC to 70ºC

commercial and -40ºC to 85ºC industrial operating

temperature ranges and offered in a 24-lead SOIC

and TSSOP package.

FUNCTIONAL DIAGRAM

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