FT245R USB FIFO IC Datasheet USB FIFO IC Datasheet
Version 2.15
Document No.: FT_000052
Clearance No.: FTDI# 39
Future Technology
Devices International Ltd
.
FT245R USB FIFO IC
Datasheet
The FT245R is a USB to parallel FIFO interface
with the following advanced features:
Single chip USB to parallel FIFO bidirectional
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 FIFO I/O configuration.
Fully integrated USB termination resistors.
Fully integrated clock generation with no
external crystal required.
Data transfer rates up to 1Mbyte / second.
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 FIFO interface I/O pins.
Synchronous and asynchronous bit bang
interface options.
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 FIFO interface for
interfacing to external logic running at between
+1.8V and +5V.
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.
+3.3V (using external oscillator) to +5.25V (using
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).
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this produ ct. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminar y
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH United Kingdom. Scotland Registered Company Number: SC136640
Copyright © Future Technology Devices International Limited
1
FT245R USB FIFO IC Datasheet USB FIFO IC Datasheet
Version 2.15
Document No.: FT_000052
Clearance No.: FTDI# 39
1 Typical Applications
Upgrading Legacy Peripherals to USB
Cellular and Cordless Phone USB data transfer
cables and interfaces
Interfacing MCU/PLD/FPGA based designs to
USB
USB Audio and Low Bandwidth Video data
transfer
PDA to USB data transfer
USB Smart Card Readers
USB Instrumentation
USB Industrial Control
USB MP3 Player Interface
USB FLASH Card Reader and Writers
Set Top Box PC - USB interface
USB Digital Camera Interface
USB Hardware Modems
USB Wireless Modems
USB Bar Code Readers
USB Software and Hardware Encryption
Dongles
1.1 Driver Support
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Windows 7 32,64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
Royalty free D2XX
Direct
Drivers
(USB Drivers + DLL S/W Interface)
Windows 7 32,64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows CE 4.2, 5.0 and 6.0
Linux 2.4 and greater
The drivers listed above are all available to download for free from FTDI website (www.ftdichip.com).
Various 3rd party drivers are also available for other operating systems - see FTDI website
(www.ftdichip.com) for details. For driver installation, please refer to the application note AN232B-10.
For driver installation, please refer to
http://www.ftdichip.com/Documents/InstallGuides.htm
1.2 Part Numbers
Part Number
FT245RQ-xxxx
FT245RL-xxxx
Note:
Packaging codes for xxx is:
-Reel: Taped and Reel, (SSOP is 2,000pcs per reel, QFN is 6,000pcs per reel).
- Tube: Tube packing, 47pcs per tube (SSOP only)
- Tray: Tray packing, 490pcs per tray (QFN only)
For example: FT245RQ-Reel is 6,000pcs taped and reel packing
Package
32 Pin QFN
28 Pin SSOP
Copyright © Future Technology Devices International Limited
2
FT245R USB FIFO IC Datasheet USB FIFO IC Datasheet
Version 2.15
Document No.: FT_000052
Clearance No.: FTDI# 39
1.3 USB Compliant
The FT245R is fully compliant with the USB 2.0 specification and has been given the USB-IF Test-ID (TID)
40680005 (Rev B) and 40770019 (Rev C).
Copyright © Future Technology Devices International Limited
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FT245R USB FIFO IC Datasheet USB FIFO IC Datasheet
Version 2.15
Document No.: FT_000052
Clearance No.: FTDI# 39
2 FT245R Block Diagram
VCC
PWREN#
3V3OUT
3.3 Volt
LDO
Regulator
VCCIO
FIFO RX Buffer
128 bytes
D0
D1
D2
D3
D4
D5
D6
D7
RD#
WR
RXF#
TXE#
Internal
EEPROM
3V3OUT
FIFO TX Buffer
256 bytes
OSCO
(optional)
OCSI
(optional)
Internal
12MHz
Oscillator
48MHz
Clock
Multiplier
RESET#
To USB Transceiver Cell
RESET
GENERATOR
USBDP
USBDM
USB
Transceiver
with
Integrated
Series
Resistors
and 1.5K
Pull-up
Serial Interface
Engine
( SIE )
USB
Protocol Engine
FIFO Controller
with
Programmable
High Drive
To USB
Transceiver
Cell
USB DPLL
TEST
GND
Figure 2.1 FT245R Block Diagram
For a description of each function please refer to Section
4.
Copyright © Future Technology Devices International Limited
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FT245R USB FIFO IC Datasheet USB FIFO IC Datasheet
Version 2.15
Document No.: FT_000052
Clearance No.: FTDI# 39
Table of Contents
1
1.1
1.2
1.3
Typical Applications....................................................... 2
Driver Support ........................................................................... 2
Part Numbers ............................................................................. 2
USB Compliant ........................................................................... 3
2
3
3.1
3.2
3.3
3.4
3.5
3.6
FT245R Block Diagram .................................................. 4
Device Pin Out and Signal Description ........................... 7
28-LD SSOP Package.................................................................. 7
SSOP Package Pin Out Description ............................................. 7
QFN-32 Package ........................................................................ 9
QFN-32 Package Signal Description ........................................... 9
FT245R FIFO READ Timing Diagrams ....................................... 11
FT245R FIFO WRITE Timing Diagrams ..................................... 12
4
4.1
4.2
Function Description ................................................... 13
Key Features ............................................................................ 13
Functional Block Descriptions .................................................. 14
5
5.1
5.2
5.3
5.4
5.5
Devices Characteristics and Ratings ............................ 15
Absolute Maximum Ratings ...................................................... 15
DC Characteristics .................................................................... 15
EEPROM Reliability Characteristics .......................................... 17
Internal Clock Characteristics .................................................. 17
Thermal Characteristics ........................................................... 18
6
6.1
6.2
6.3
6.4
USB Power Configurations ........................................... 19
USB Bus Powered Configuration ............................................. 19
Self Powered Configuration ..................................................... 20
USB Bus Powered with Power Switching Configuration ........... 21
USB Bus Powered with Selectable External Logic Supply ......... 22
7
7.1
7.2
Application Examples .................................................. 23
USB to MCU FIFO Interface ...................................................... 23
Using the External Oscillator.................................................... 24
8
9
9.1
Internal EEPROM Configuration ................................... 25
Package Parameters .................................................... 26
SSOP-28 Package Dimensions ................................................. 26
5
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