Digital Potentiometers

8

_______________________________________________________________________________________

Pin Description

PIN

TSSOP

THIN QFN

NAME

FUNCTION

1

15

HA

Potentiometer A High Terminal

2

14

WA

Potentiometer A Wiper Terminal

3

13

LA

Potentiometer A Low Terminal

4

12

HB

Potentiometer B High Terminal

5

11

WB

Potentiometer B Wiper Terminal

6

10

LB

Potentiometer B Low Terminal

79

WP

Write-Protect Input. Connect to GND to allow changes to the wiper position and the data stored

87

GND

Ground

9

6

A2

10

5

A1

11

4

A0

12

3

SDA

I

13

2

SCL

I

14

1

with a 0.1µF capacitor installed as close to the device as possible.

—

8, 16

N.C.

No Connection. Do not connect.

—

EP

EP

Exposed Paddle. Do not connect.

SDA

SCL

START

CONDITION

(S)

REPEATED START

CONDITION

(SR)

STOP

CONDITION

(P)

START

CONDITION

(S)

ACKNOWLEDGE

(A)

PARAMETERS ARE MEASURED FROM 30% TO 70%.

Detailed Description

The MAX5477/MAX5478/MAX5479 contain two resistor

arrays with 255 elements in each array. The MAX5477

has a total end-to-end resistance of 10k

Ω, the

MAX5478 has an end-to-end resistance of 50k

Ω, and

the MAX5479 has an end-to-end resistance of 100k

Ω.

The MAX5477/MAX5478/MAX5479 provide access to

the high, low, and wiper terminals for a standard volt-

age-divider configuration. Connect H_, L_, and W_ in

any desired configuration as long as their voltages