Copyright © 2010 Future Technology Devices International Limited

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Document Reference No.: FT_000148

USB-COM232-PLUS4 Datasheet

Version 1.2

Clearance No.: FTDI# 97

Figure 1.2 USB-COM232-PLUS4 Block Diagram

1.3.1 Block description

USB MINI B Client Connector

This connector provides the interface for connection to a USB Host or Hub port. The maximum cable

length is 5 meters, according to the USB 2.0 specification.

FTDI FT4232H

The FTDI FT4232H provides the Hi-Speed USB-to-Serial conversion. Operating system device drivers are

required in order to work with the FT4232H to provide the quad Virtual COM Port serial interfaces.

RS232 Level Shifter

The RS232 level shifter converts the signals provided by the FT4232H into the voltage levels required by

RS232 devices.

DE-9P Connector (Male)

The DE-9P connector is configured in an industry standard (TIA/EIA-574) pin-out to provide connection to

RS232 peripherals through standard cables. See section 3.1.2

USB MINIB

Client

Connector

FTDI FT4232H

USB Serial Bridge

RS232

Level Shifter

DE-9P

Connector D

DE-9P

Connector B

DE-9P

Connector C

DE-9P

Connector A

RS232

Level Shifter

RS232

Level Shifter

RS232

Level Shifter