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USB-RS232-PCBA

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
Copyright © 2011 Future Technology Devices International Limited 9
Document Reference No.: FT_000079
USB TO RS232 UART SERIAL CONVERTER PCB Datasheet Version 1.41
Clearance No.: FTDI# 52
4.1 USB-RS232-PCB Signal Descriptions
Name
Type
Description
GND
GND
Device ground supply pin.
CTS#
Input
Clear to Send Control input / Handshake signal.
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)
TXD
Output
Transmit Asynchronous Data output.
RXD
Input
Receive Asynchronous Data input.
RTS#
Output
Request To Send Control Output / Handshake signal.
Table 4.1 USB-RS232-PCB Signal Descriptions
4.2 USB-RS232-PCB +5V/+3.3V Selection
Selection of whether the POWER signal is GND, +3.3V or +5V is done using resistors. The following table
gives details of what resistors are required for the different voltage levels.
Resistor
R2
Resistor
R3
Description
Not
Fitted
Not
Fitted
VCC floats
Fitted
Not
Fitted
POWER Signal is +3.3V
Not
Fitted
Fitted
POWER Signal is +5.0V
Table 4.2 UART Signal Level Selection
Copyright © 2011 Future Technology Devices International Limited 10
Document Reference No.: FT_000079
USB TO RS232 UART SERIAL CONVERTER PCB Datasheet Version 1.41
Clearance No.: FTDI# 52
4.3 USB-RS232-PCB 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 4.3 USB-RS232-PCB
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Vtrans
RS232 Transmitter output
voltage swing
+/- 5
+/- 6.5
+/- 15
V
Vrec
RS232 Receiver input
voltage range
-25
+25
V
Table 4.4 USB-RS232-PCB I/O Pin Characteristics
Description
Conditions
Minimum
Typical
Maximum
ESD HBM
RS-232 Inputs and Outputs
±15 kV
EN61000-4-2ContactDischarge
RS-232 Inputs and Outputs
±8 kV
EN61000-4-2AirGapDischarge
RS-232 Inputs and Outputs
±15 kV
Table 4.5 USB-RS232-WE ESD Tolerance
Copyright © 2011 Future Technology Devices International Limited 11
Document Reference No.: FT_000079
USB TO RS232 UART SERIAL CONVERTER PCB Datasheet Version 1.41
Clearance No.: FTDI# 52
5 USB-RS232-PCB Circuit Schematic
The circuit schematic of the USB-RS232-PCB, utilising the FTDI FT232R, is shown in Figure 5.1
Figure 5.1 Circuit Schematic of USB-RS232-PCB.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

USB-RS232-PCBA

Mfr. #:
Buy USB-RS232-PCBA
Manufacturer:
FTDI Chip
Description:
Interface Modules USB to RS232 Embeded Converter PCB Assy
Lifecycle:
New from this manufacturer.
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