CAT5409 datasheet(1/16 Pages) CATALYST

Part #	CAT5409

Description	Quad Digitally Programmable Potentiometers (DPP?? with 64 Taps and I짼C Interface

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Manufacturer	CATALYST [Catalyst Semiconductor]

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CAT5409

1

Doc. No. MD-2010 Rev. K

Characteristics subject to change without notice

Quad Digitally Programmable Potentiometers

(DPP™) with 64 Taps and I²C Interface

FEATURES

Four linear taper digitally programmable

potentiometers

64 resistor taps per potentiometer

End to end resistance 2.5kΩ, 10kΩ, 50kΩ or

100kΩ

I²C interface

Low wiper resistance, typically 80Ω

Four non-volatile wiper settings for each

potentiometer

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

Write protection for data register

For Ordering Information details, see page 15.

PIN CONFIGURATION

SOIC (W)

TSSOP (Y)

DESCRIPTION

The

CAT5409

is

four

Digitally

Programmable

Potentiometers (DPP™) integrated with control logic

and 16 bytes of NVRAM memory.

A separate 6-bit control register (WCR) independently

controls the wiper tap position 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 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 register (WCR).

The Write Protection (WP

¯¯¯) pin protects against

inadvertent programming of the data register.

The CAT5409 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

2

23

RL0

RL3

322

RH0

RH3

124

VCC

NC

4

RW0

RW3

21

A0

A2 520

NC

619

WP

A1

SCL

8

17

RL1

RL2

916

A3

718

SDA

RH1

RH2

10

15

RW1

RW2

11

14

GND

NC

12

13

2

23

RL0

RL3

322

RH0

RH3

124

VCC

4

RW0

RW3

21

A0

A2

520

NC

619

WP

A1

SCL

8

17

RL1

RL2

916

A3

718

SDA

RH1

RH2

10

15

RW1

RW2

NC

11

14

GND

NC

12

13

NONVOLATILE

DATA

REGISTERS

CONTROL LOGIC

WIPER CONTROL

REGISTERS

I²C BUS

INTERFACE

RW0

RW1

RW2

RW3

RL0

A0

A1

A2

A3

SCL

SDA

RL1

RL2

RL3

RH0

RH1

RH2

RH3

WP

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