CAT5221YI-50 datasheet(1/16 Pages) ONSEMI

No. de pieza	CAT5221YI-50

Descripción Electrónicos	Dual Digitally Programmable Potentiometer with 64 Taps and I2C Interface

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CAT5221

1

Doc. No. MD-2113 Rev. L

Characteristics subject to change without notice

Dual Digitally Programmable Potentiometer (DPP™) with

64 Taps and I

2C Interface

FEATURES

Two linear-taper digitally programmable

potentiometers

64 resistor taps per potentiometer

End to end resistance 2.5k

Ω, 10kΩ, 50kΩ or

100k

Ω

Potentiometer control and memory access via

I

2C interface

Low wiper resistance, typically 80

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 1µA

1,000,000 nonvolatile WRITE cycles

100 year nonvolatile memory data retention

20-lead SOIC and TSSOP packages

Industrial temperature range

For Ordering Information details, see page 15.

PIN CONFIGURATION

SOIC 20 Lead (W)

TSSOP 20 Lead (Y)

RW0

1

20 V

CC

RL0

2

19 NC

RH0

3

18 NC

A0

4

17 NC

A2

5

16 A1

RW1

6

15 A3

RL1

7

14 SCL

RH1

8

13 NC

SDA

9

12 NC

GND

10

11 NC

CAT

5221

DESCRIPTION

The

CAT5221

is

two

Digitally

Programmable

Potentiometers (DPPs™) integrated with control logic

and 16 bytes of NVRAM memory. Each DPP consists

of a series of 63 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

6-bit control register (WCR) independently controls

the wiper tap switches for each DPP. Associated with

each wiper control register are four 6-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 I

2C 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

register (WCR).

The CAT5221 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.

FUNCTIONAL DIAGRAM

RW0

RW1

RH0

SCL

SDA

A0

A1

A2

A3

RH1

RL0

RL1

NONVOLATILE

DATA

REGISTERS

WIPER

CONTROL

REGISTERS

CONTROL

LOGIC

I2C

INTERFACE

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