General Description

The DS3900 provides bidirectional communication with

2-wire and 3-wire devices using a PC’s serial

port. In addition, it can also be used as a general-pur-

pose digital I/O interface with 11 I/O signals that can

evaluate a wide variety of ICs.

The DS3900 is intended for evaluation purposes only.

Applications

Prototyping 2-Wire and 3-Wire Device Designs

Evaluating 2-Wire and 3-Wire Devices

Building Test Software for Systems Containing

2-Wire or 3-Wire Devices

Communicating With ICs that Require up to 11 I/O

Signals

Features

♦ Communicates from PCs to ICs Through a

Serial Port

♦ Fast Communication to 2-Wire Devices

♦ Eleven General-Purpose Digital I/O Pins,

Including SDA and SCL

♦ Built-in Pullup Resistors for SDA and SCL

Minimize Required External Hardware

♦ Connection to Standard Prototyping Boards

Possible Using Header Connectors

♦ Operates from 3.0V to 5.5V

Serial Communications Module

For Evaluation Kits

______________________________________________ Maxim Integrated Products

1

Ordering Information

Rev 1; 7/04

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.

Typical Operating Circuit appears at end of data sheet.

PART

DESCRIPTION

DS3900EVKIT

DS3900 Module

DS3900 Photo

R1.0

U1

C4

C6

C1

X1

R2

R3

SCL

SDA

JP1

JP2

C5

P1

P2

P3

(N.C.) RESET

GND

P4

P5

GND

P11 / SDA

P10 / SCL

GND

P9

P8

P7

P6

DS3900

Pin Configuration