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Copyright © 2010 Future Technology Devices International Limited 8
Document Reference No.: FT_000077
USB TO RS232 SERIAL CONVERTER RANGE OF CABLES Datasheet Version 1.3
Clearance No.: FTDI# 51
5.2 USB-RS232-WE Cable Signal Descriptions
Colour
Name
Type
Description
Black
GND
GND
Device ground supply pin.
Brown
CTS#
Input
Clear to Send Control input / Handshake signal.
Red
POWER
Output
Power output. Default is GND, but can be customised to
output +3.3V or +5V. If required, contact FTDI Sales Team
(sales1@ftdichip.com)
Orange
TXD
Output
Transmit Asynchronous Data output.
Yellow
RXD
Input
Receive Asynchronous Data input.
Green
RTS#
Output
Request To Send Control Output / Handshake signal.
Table 5.1 USB-RS232-WE Cable Signal Descriptions
5.3 USB-RS232-WE Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC_5V
Output Power Voltage*
4.25
5.0*
5.25
V
*Default is GND. This figure
only applies when cable has
been customised to output
+5V. The range is
dependent on the USB port
that the USB-RS232-WE is
connected to
VCC_3.3V
Output Power Voltage**
3.2
3.3**
3.4
V
**Default is GND. This
figure only applies when
cable has been customised
to output +3.3V.
I
O
Output Power Current***
-
75
mA
***Only applies when
POWER output is customised
to +5V or+3.3V
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
o
C
Table 5.2 USB-RS232-WE I/O Operating Parameters
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