1

®

FN6177.2

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

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ISL22346

Quad Digitally Controlled Potentiometers (XDCP™)

128 Taps

The ISL22346 integrates four digitally controlled potentiometers

(DCP) and non-volatile memory on a monolithic CMOS

integrated circuit.

The digitally controlled potentiometers are implemented with

a combination of resistor elements and CMOS switches. The

position of the wipers are controlled by the user through the

volatile Wiper Register (WR) and a non-volatile Initial Value

Register (IVR) that can be directly written to and read by the

user. The contents of the WR controls the position of the

wiper. At power-up the device recalls the contents of the two

DCP’s IVR to the corresponding WRs.

The DCPs can be used as a three-terminal potentiometers

or as a two-terminal variable resistors in a wide variety of

applications including control, parameter adjustments, and

signal processing.

Features

• Four potentiometers in one package

• 128 resistor taps

- Three address pins, up to eight devices/bus

• Non-volatile storage of wiper position

• Wiper resistance: 70

Ω typical @ V

• Shutdown mode

• Shutdown current 5µA max

• Power supply: 2.7V to 5.5V

•50k

Ω or 10kΩ total resistance

• High reliability

- Endurance: 1,000,000 data changes per bit per register

• 20 Ld TSSOP or 20 Ld TQFN package

• Pb-free (RoHS compliant)

Pinouts

ISL22346

(20 LD TSSOP)

TOP VIEW

ISL22346

(20 LD TQFN)

TOP VIEW

RW0

RL0

RH0

SHDN

VCC

A1

A0

RH1

RL1

RW1

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

RH3

RL3

RW3

A2

SCL

SDA

GND

RW2

RL2

RH2

1

2

3

4

6

18

20 19

RL3

RH2

RW1

8

17

9

RH1

RW0

RL1

15

14

13

12

7

RL0

RH3

16

5

RW3

RL2

11

10

O

Data Sheet

September 3, 2009