Datasheet

Copyright © 2010 Future Technology Devices International Limited 20
Document Reference No.: FT_000054
TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
Clearance No.: FTDI# 53
8 Cable PCB Circuit Schematic
The circuit schematic for the small internal electronic circuit board, utilising the FTDI FT232R, which is
encapsulated into the USB connector end of the cable, is shown in Figure 8.1.
Customised versions of these cables are also available. Users interested in customised versions of these
cables should contact FTDI sales ([e-mail]).
FT232RQ
30 32
2 8
4 17 20 24 26
14
15
18
1
19
16
270R 270R
TXD
RTS#
RXD
CTS#
100nF
VCC-3V3
VCCIO
VCC
100nF
4.7uF
+
FB
10nF
1
2 3 4
5
GND
47pF x 2
USB-DP
USB-DM
USB “A” PLUG
INTERNAL IO VOLTAGE SELECTION
VCC
VCC-3V3
VCC-IO
PULL UP RESISTORS
NOT FITTED
CTS#
TXD
RXD
RTS#
VCC-IO
Figure 8.1 Circuit Schematic of PCB Used in the TTL to USB Serial Converter Cables