MAX5477 datasheet(8/15 Pages) MAXIM

8 / 15 page

Dual, 256-Tap, Nonvolatile, I2C-Interface,

Digital Potentiometers

_______________________________________________________________________________________

Pin Description

TSSOP

THIN QFN

NAME

FUNCTION

Potentiometer A High Terminal

Potentiometer A Wiper Terminal

Potentiometer A Low Terminal

Potentiometer B High Terminal

Potentiometer B Wiper Terminal

Potentiometer B Low Terminal

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

in the EEPROM. Connect to VDD or leave open to enable the write protection of the EEPROM.

GND

Ground

Address Input 2. Connect to VDD or GND (see Table 1).

Address Input 1. Connect to VDD or GND (see Table 1).

Address Input 0. Connect to VDD or GND (see Table 1).

SDA

2C Serial Data

SCL

2C Clock Input

VDD

Power-Supply Input. Connect a +2.7V to +5.25V power supply to VDD and bypass VDD to GND

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

—

8, 16

N.C.

No Connection. Do not connect.

—

Exposed Paddle. Do not connect.

SDA

SCL

START

CONDITION

(S)

tHD:STA

tHIGH

tLOW

tSU:DAT

tHD:DAT

REPEATED START

CONDITION

(SR)

tHD:STA

tSU:STA

tSU:STO

tBUF

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

remain between GND and VDD.

Figure 1. I2C Serial-Interface Timing Diagram

MAX5477 Datasheet(PDF) 8 Page - Maxim Integrated Products

MAX5477 Datasheet(HTML) 8 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Datasheet Download

Link URL