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PDF FT232R Data sheet ( Hoja de datos )
| Número de pieza | FT232R | |
| Descripción | USB UART IC | |
| Fabricantes | FTDI | |
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FT232R USB UART IC Datasheet
Version 2.13
Document No.: FT_000053 Clearance No.: FTDI# 38
Future Technology Devices
International Ltd.
FT232R USB UART IC
The FT232R is a USB to serial UART
interface with the following advanced
features:
Single chip USB to asynchronous serial data
transfer interface.
Entire USB protocol handled on the chip. No
USB specific firmware programming required.
Fully integrated 1024 bit EEPROM storing
device descriptors and CBUS I/O configuration.
Fully integrated USB termination resistors.
Fully integrated clock generation with no
external crystal required plus optional clock
output selection enabling a glue-less interface
to external MCU or FPGA.
Data transfer rates from 300 baud to 3 Mbaud
(RS422, RS485, RS232) at TTL levels.
128 byte receive buffer and 256 byte transmit
buffer utilising buffer smoothing technology to
allow for high data throughput.
FTDI’s royalty-free Virtual Com Port (VCP) and
Direct (D2XX) drivers eliminate the
requirement for USB driver development in
most cases.
Unique USB FTDIChip-ID™ feature.
Configurable CBUS I/O pins.
Transmit and receive LED drive signals.
UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /
no parity
FIFO receives and transmits buffers for high
data throughput.
Synchronous and asynchronous bit bang
interface options with RD# and WR# strobes.
Device supplied pre-programmed with unique
USB serial number.
Supports bus powered, self-powered and high-
power bus powered USB configurations.
Integrated +3.3V level converter for USB I/O.
Integrated level converter on UART and CBUS
for interfacing to between +1.8V and +5V
logic.
True 5V/3.3V/2.8V/1.8V CMOS drive output
and TTL input.
Configurable I/O pin output drive strength.
Integrated power-on-reset circuit.
Fully integrated AVCC supply filtering - no
external filtering required.
UART signal inversion option.
+3.3V (using external oscillator) to +5.25V
(internal oscillator) Single Supply Operation.
Low operating and USB suspend current.
Low USB bandwidth consumption.
UHCI/OHCI/EHCI host controller compatible .
USB 2.0 Full Speed compatible.
-40°C to 85°C extended operating temperature
range.
Available in compact Pb-free 28 Pin SSOP and
QFN-32 packages (both RoHS compliant).
N either the whole nor any part of the information c ontained in, or the produc t des c ribed in this manual, may be adapted or re produc ed
in any material or elec tronic form without the prior written c ons ent of the c opyright holder. T his produc t and its doc umentation are
s upplied on an as - is bas is and no warranty as to their s uitability for any partic ular purpose is either made or implied. Future T e chnology
D evic es I nternational L td will not ac c ept any c laim for damages hows oever aris ing as a res ult of us e or failure of this produ c t. Y our
s tatutory rights are not affec ted. T his product or any variant of it is not intended for us e in any medic al appli anc e, devic e or s ys tem in
whic h the failure of the produc t might reas onably be expec ted to res ult in pers onal injury. T his doc ument provides preliminar y
information that may be s ubjec t to c hange without notice. N o freedom to us e patents or other intellectu al property rights is implied by
the public ation of this doc ument. Future T ec hnology D evic es I nternational L td, Unit 1, 2 Seaward Place, Centurion Business Park , Glasgow
G41 1HH U nited Kingdom. Sc otland Regis tered C ompany N umber: SC 1 3 6 6 4 0
Copyright © 2015 Future Technology Devices International Limited
1
1 page  
Table of Contents
FT232R USB UART IC Datasheet
Version 2.13
Document No.: FT_000053 Clearance No.: FTDI# 38
1 Typical Applications .................................................... 2
1.1 Driver Support ........................................................................ 2
1.2 Part Numbers ......................................................................... 3
1.3 USB Compliant ........................................................................ 3
2 FT232R Block Diagram ................................................ 4
3 Device Pin Out and Signal Description .......................... 7
3.1 28-LD SSOP Package ............................................................... 7
3.2 SSOP Package Pin Out Description........................................... 7
3.3 QFN-32 Package ....................................................................10
3.4 QFN-32 Package Signal Description ........................................10
3.5 CBUS Signal Options ..............................................................13
4 Function Description ................................................. 14
4.1 Key Features..........................................................................14
4.2 Functional Block Descriptions .................................................15
5 Devices Characteristics and Ratings........................... 17
5.1 Absolute Maximum Ratings ....................................................17
5.2 DC Characteristics..................................................................18
5.3 EEPROM Reliability Characteristics .........................................21
5.4 Internal Clock Characteristics.................................................21
5.5 Thermal Characteristics .........................................................22
6 USB Power Configurations ......................................... 23
6.1 USB Bus Powered Configuration ............................................23
6.2 Self Powered Configuration ....................................................24
6.3 USB Bus Powered with Power Switching Configuration............25
6.4 USB Bus Powered with Selectable External Logic Supply .........26
7 Application Examples ................................................ 28
7.1 USB to RS232 Converter.........................................................28
7.2 USB to RS485 Converter.........................................................29
7.3 USB to RS422 Converter.........................................................30
7.4 USB to MCU UART Interface....................................................31
Copyright © 2015 Future Technology Devices International Limited
5
5 Page 
Pin No. Name
FT232R USB UART IC Datasheet
Version 2.13
Document No.: FT_000053 Clearance No.: FTDI# 38
Type
Description
powered designs a regulator which is supplied by the +5V on the USB bus should be
used.
4, 17, 20 GND
PWR Device ground supply pins.
+3.3V output from integrated LDO regulator. This pin should be decoupled to
ground using a 100nF capacitor. The purpose of this output is to provide the
16 3V3OUT Output internal +3.3V supply to the USB transceiver cell and the internal 1.5kΩ pull up
resistor on USBDP. Up to 50mA can be drawn from this pin to power external logic if
required. This pin can also be used to supply the VCCIO pin.
19
VC C
PWR +3.3V to +5.25V supply to the device core. (See Note 1).
24
AGND
PWR Device analogue ground supply for internal clock multiplier.
Table 3.6 Power and Ground Group
Pin No. Name Type
Description
5, 12,
13, 23,
25, 29
NC
NC No internal connection. Do not connect.
18
RESET#
Input
Active low reset. Can be used by an external device to reset the FT232R. If not
required can be left unconnected, or pulled up to VCC.
26
TEST
Input
Puts the device into IC test mode. Must be tied to GND for normal operation,
otherwise the device will appear to fail.
27
OSC I
Input
Input 12MHz Oscillator C ell. Optional – C an be left unconnected for normal
operation. (See Note 2).
28
OSC O
Output
Output from 12MHZ Oscillator Cell. Optional – C an be left unconnected for normal
operation if internal Oscillator is used. (See Note 2).
Table 3.7 Miscellaneous Signal Group
Pin
No.
30
31
32
2
3
6
7
Name Type
Description
TXD Output Transmit Asynchronous Data Output.
DTR# Output Data Terminal Ready Control Output / Handshake Signal.
RTS# Output Request to Send Control Output / Handshake Signal.
RXD
Input Receiving Asynchronous Data Input.
RI#
Input
Ring Indicator Control Input. When remote wake up is enabled in the internal EEPROM
taking RI# low (20ms active low pulse) can be used to resume the PC USB host
controller from suspend.
DSR# Input Data Set Ready Control Input / Handshake Signal.
DC D# Input Data C arrier Detect C ontrol Input.
Copyright © 2015 Future Technology Devices International Limited
11
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