General Description

The USBTO232 is an adapter board that converts a

PC’s USB port into a standard COM port. A COM port is

also known as the standard serial port that uses

Recommended Standard 232 (RS-232).

The USBTO232 is included with selected Maxim EV kits

and EV systems that were originally designed for the

PC COM port and later updated to also support the

USB port. Data sheets for EV kits and EV systems that

can use the USBTO232 have been updated to reflect

compatibility and also provide ordering information.

Use of the USBTO232 in applications other than those

EV kits specified by Maxim is not supported.

Important: Before using the USBTO232, see the

Quick

Start section of this data sheet to correctly install the

system.

Features

o USB Powered

o USB Driver for Windows 98SE/2000/XP Operating

Systems

o USB and I/O Power LED Indicators

o Two GPIO LED Indicators

o USB Cable Included

o 8-Pin Signal Header

o Proven PCB Layout

o Fully Assembled and Tested

USB-to-COM Port Adapter Board User Guide

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-0677; Rev 0; 11/06

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.

+

Denotes lead-free and RoHS compliance.

PART

PC

INTERFACE

OPERATING SYSTEMS

SUPPORTED

USBTO232+

USB

Windows 98SE/2000/XP

Component List

Windows is a registered trademark of Microsoft Corp.

DESIGNATION

QTY

DESCRIPTION

C1

1

0.01µF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H103K

C2, C3

2

47pF ±5%, 50V COG ceramic

capacitors (0603)

TDK C1608C0G1H470J

C4–C8, C11,

C12

7

0.1µF ±10%, 16V X7R ceramic

capacitors (0603)

TDK C1608X7R1C104K

C9

1

4.7µF ±10%, 6.3V X5R ceramic

capacitor (0603)

TDK C1608X5R0J475K

C10

1

1µF ±10%, 6.3V X5R ceramic

capacitor (0603)

TDK C1608X5R0J105K

D1

1

Red LED (0603)

Panasonic LNJ208R8ARA

D2

1

Green LED (0603)

Stanley Electric BG1111C-TR

Panasonic LNJ314G8TRA

FB1

1

40

Ω @ 100MHz, 1.5A ferrite bead

(0805)

Steward MI0805K400R-10

H1

1

8-pin header

JU1, JU2, JU3

3

3-pin headers

DESIGNATION

QTY

DESCRIPTION

P1

1

USB type B right-angle female

receptacle connector

Assmann AU-Y1007-R

P2

1

Short DB9 right-angle male

receptacle connector (without

cable-locking screws)

R1, R2

2

270

Ω ±5% resistors (0603)

(use lead-free parts only)

U1

1

USB-to-UART converter

FTDI FT232RL (28-pin SSOP)

U2

1

MAX213EEAI+ (28-pin SSOP)

—

3

Shunts

—

1

USBTO232+ PCB

—

1

USB high-speed A-to-B 6ft cable

Note: Indicate the Maxim EV kit that you are using when con-

tacting this component supplier.

SUPPLIER

PHONE

WEBSITE

TDK

847-803-6100

www.component.tdk.com

Component Supplier