USB-COM232-PLUS4 FTDI, USB-COM232-PLUS4 Datasheet - Page 12

• Manufacturer Part Number: USB-COM232-PLUS4
• Description: Interface Modules & Development Tools USB HS to RS232 Conv Assembly 4 DB9 Ports
• Manufacturer: FTDI

Specifications of USB-COM232-PLUS4

• Interface Type: USB, RS-232
• Data Bus Width: Serial
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: FT4232H
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: USB-COM232-PLUS-4

3
3.1
3.1.1 USB
The USB-COM232-PLUS4 is a downstream USB 2.0 High-speed Device. A standard USB Series “miniB”
receptacle is mounted inside the USB-COM232-PLUS4 to facilitate connection to an upstream USB Host or
Hub.
Table 3.1 – USB "miniB" Receptacle Pin-Out
3.1.2 RS232
The RS232 port is configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin connector.
Pin assignments are according to TIA/EIA-574 which formally defines the assignments for a COM port
found on many personal computers.
Table 3.2 – DE-9P RS232 Pin-Out
Pin Number
Pin Number
Connections
Shield
Shield
External Connectors
1
2
3
4
5
1
2
3
4
5
6
7
8
9
Case Ground
Case Ground
Bidirectional
Bidirectional
Pin Type
Pin Type
Ground
Ground
Output
Output
Output
Power
Input
Input
Input
Input
Input
ID
Copyright © 2010 Future Technology Devices International Limited
Description
VBUS – USB Power provided from upstream USB Host or Hub
D– = USB data signal, negative polarity
D+ = USB data signal, positive polarity
ID = Host /slave select pin ,No used
GND = USB signal ground
Drain = typically connected to the host PC case
Description
DCD = Data Carrier Detect
RXD = Receive Data
TXD = Transmit Data
DTR = Data Terminal Ready
GND = RS232 signal ground
DSR = Data Set Ready
RTS = Request To Send
CTS = Clear To Send
RI = Ring Indicator
Drain = typically connected to the host PC case
Document Reference No.: FT_000148
USB-COM232-PLUS4 Datasheet
Clearance No.: FTDI# 97
Version 1.2
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