FT230XQ-R International Semiconductor Technologies, FT230XQ-R Datasheet - Page 25

• Manufacturer Part Number: FT230XQ-R
• Description: Specifications: Number of Channels: 1, UART ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
• Manufacturer: International Semiconductor Technologies

7
The following sections illustrate possible applications of the FT230X. The illustrations have omitted pin
numbers for ease of understanding since the pins differ between the FT230XS and FT230XQ package
options.
7.1 USB to RS232 Converter
Figure 7.1 Application Example showing USB to RS232 Converter
An example of using the FT230X as a USB to RS232 converter is illustrated in Figure 7.1. In this
application, a 3V3 TTL to RS232 Level Converter IC is used on the serial UART interface of the FT230X to
convert the 3V3 levels of the FT230X to RS232 levels. This level shift can be done using line drivers from
a variety of vendors e.g. Zywyn. A useful feature on some of these devices is the SHDN# pin which can
be used to power down the device to a low quiescent current during USB suspend mode.
A suitable level shifting device is the Zywyn ZT3243F which is capable of RS232 communication at up to
1000k baud.
In example shown, the CBUS1 and CBUS2 have been configured as TXLED# and RXLED# and are being
used to drive two LEDs.
Application Examples
SHIELD
5
1
2
3
4
Copyright © 2013 Future Technology Devices International Limited
100nF
GND
10nF
47pF
Ferrite
Bead
VCC
GND
+
GND
4.7uF
47pF
VCC
GND
27R
27R
RTS#
CTS#
RXD
TXD
100nF
USBDM
VCC
USBDP
3V3OUT
RESET#
VCCIO
FT230X
10k
VCCIO
Document No.: FT_000566 Clearance No.: FTDI# 260
10k
CBUS2
CBUS0
CBUS1
RTS#
CTS#
FT230X USB TO BASIC UART IC
RXD
TXD
10k
10k
SLEEP#
RTS#
CTS#
RXD
TXD
RXDATA
TXDATA
CTS
RTS
SHDN#
GND
SHIELD
7
2
6
1
TXDATA
RTS
CTS
5
9
4
8
3
RXDATA
TXLED
RXLED
10
VCCIO
DB9M
Version 1.2
270R
VCCIO
270R
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