Datasheet > DB9-USB-RS232

DB9-USB-RS232

更新时间： 2024-01-05 19:37:41

品牌	Logo	应用领域
飞特帝亚 - FTDI		/
页数	文件大小	规格书
27页	706K
描述
DB9-USB-RS232 Module Male & Female

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中文翻译

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数据手册

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DB9-USB-RS232 数据手册

Document Reference No.: FT_000204

DB9-USB-RS232 Datasheet

Version 1.2

Clearance No.: FTDI# 130

2.1.2 Replacing an RS232 DB9 MALE (DTE defined) Connector

The DB9-USB-RS232-M can be used to replace a male DB9 connector used for transmitting RS232

protocol. With the DB9-USB-RS232-M in place instead of the standard USB connector a USB bridge is

created, this allow the application to communicate with other devices via USB. Installing the DB9-USB-

RS232-M is simple. Simply replace the male DB9 connector with the DB9-USB-RS232-M connector (same

PCB footprint), install drivers and the device is ready to use.

Table 2.2 gives the pin out description of each pad of an RS232 footprint. Figure 2.2 gives a description

of the connections between the DB9-USB-RS232-M and the footprint of a male DB9 module.

Pin Type of DB9-

Pin Type at

Description

Number

USB-RS232 module

application PCB

Input (note1)

Output

Input

DCD = Data Carrier Detect

RXD = Receive Data

(this is an output from the DB9-USB-

RS232-M to the application Rx input)

TXD = Transmit Data

Input

Output

(this is an input to the DB9-USB-RS232-M

from the application Tx output)

DTR = Data Terminal Ready

Input

Ground

Output

Ground

Input

(this is an input to the DB9-USB-RS232-M

from the application DTR output)

GND = RS232 signal ground

DSR = Data Set Ready

(this is an output from the DB9-USB-

RS232-M to the application DSR input)

RTS = Request To Send

Input

Output

Input

(this is an input to the DB9-USB-RS232-M

from the application RTS output)

CTS = Clear To Send

Output

(this is an output from the DB9-USB-

RS232-M to the application CTS input)

Input (note1)

Ground

Input

RI = Ring Indicator

Drain = typically connected to the host PC

case

Shield

Case Ground

Table 2.2 – A Male RS232 DB9 footprint Pin-Out

Note 1: The DB9-USB-RS232-M is electrically configured to be a DTE (Data Terminating Equipment) device

with a null-modem wiring. The null-modem wiring allows DTE to DTE communications between the DB9-

USB-RS232-M and a standard DB9 male application board. However a DTE device is defined to have 5

inputs and 3 outputs, where a DCE (Data Communications Equipment) is defined to have 3 inputs and 5

outputs as in the case of the female DB9 application boards. This leads to a conflict in an DTE to DTE

connection application, This conflict is that there are more inputs to a connected USB-converter device than

there are outputs from the application board (and more inputs to the application board than there are outputs

of the USB converter). This conflict occurs on the DCD and RI connections and as such they cannot be

used. This issue is very common when translating RS232 to USB from a DTE perspective. Additional

information showing DTE and DCE wiring is given in Appendix B.

Figure 2.1 illustrates these connections from a PCB footprint point of view. Figure 2.2 Illustrates the

connection made to an example PCB.

1...4 5 678 9 10...27

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与DB9-USB-RS232相关器件

型号	品牌	获取价格	描述	数据表
DB9W4P300A00LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P300A40LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343G00LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343G30LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343G40LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343H00LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343H30LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P343H40LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, ROHS COMPLIANT
DB9W4P500G00LF	AMPHENOL	获取价格	D Subminiature Connector, 5 Contact(s), Male, Solder Terminal, Locking, LEAD FREE
DB9W4P500G30LF	AMPHENOL	获取价格	D Subminiature Connector, 9 Contact(s), Male, Solder Terminal, Locking, LEAD FREE

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