General Description

The DS3930 contains six 256-position nonvolatile (NV)

potentiometers, 64 bytes of NV user EEPROM memory,

and four programmable NV I/O pins. The six poten-

tiometers all share a common low side. The potentiome-

ters are separated into two groups of three 50k

Ω

potentiometers in parallel. Each group of three poten-

tiometers shares a common high side and forms an

equivalent resistance of 16.6k

Ω (three 50kΩ poten-

tiometers in parallel).

Applications

RF Transceivers

Voltage References

Power Supply Calibration

Mobile Phones and PDAs

Fiber Optic Transceiver Modules

Portable Electronics

Radio Tuners

Small, Low-Cost Replacement for Mechanical

Potentiometers

Features

♦ Six 256-Position NV Potentiometers

♦ Four General-Purpose NV I/O Pins

♦ 64 Bytes of User EEPROM Memory

♦ 0 to 5.5V on Any Potentiometer Terminal,

♦ All Six Potentiometers Share a Common Low Side

♦ Potentiometers Separated into Two Groups of

Three Potentiometers, Each Sharing a Common

High Side

♦ 2-Wire Serial Interface

♦ Wide Supply Range (2.7V to 5.5V)

♦ Up to Eight DS3930s Can Share the Same

2-Wire Bus

Hex Nonvolatile Potentiometer with

I/O and Memory

_____________________________________________ Maxim Integrated Products

1

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

SDA

A2

A1

A0

TOP VIEW

SCL

12

11

9

10

GND

TSSOP

DS3930

Pin Configuration

A2

SDA

GND

SCL

A0

A1

DECOUPLING CAP

0.1

µF

2-WIRE

INTERFACE

4.7k

Ω

4.7k

Ω

DIGITAL

NONVOLATILE I/O

DIGITAL

NONVOLATILE I/O

WIPER

TERMINALS

WIPER

TERMINALS

DS3930

Typical Operating Circuit

Ordering Information

Rev 0; 4/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

PIN-PACKAGE

DS3930E

20 TSSOP