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Document No.: FT_000052

FT245R USB FIFO IC Datasheet Version 2.12

Clearance No.: FTDI# 39

Future Technology

Devices International Ltd.

FT245R USB FIFO IC

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 product. 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 preliminary

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

Summary of content (37 pages)

PAGE 1
Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Future Technology Devices International Ltd. FT245R USB FIFO IC The FT245R is a USB to parallel FIFO interface with the following advanced features: Device supplied pre-programmed with unique USB serial number. Supports bus powered, self powered and high-power bus powered USB configurations. Single chip USB to parallel FIFO bidirectional data transfer interface. Integrated +3.3V level converter for USB I/O.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 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).
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 2 FT245R Block Diagram VCC PWREN# 3V3OUT USBDP USBDM 3.3 Volt LDO Regulator USB Transceiver with Integrated Series Resistors and 1.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Table of Contents 1 Typical Applications ........................................................................ 2 1.1 Driver Support .................................................................................... 2 1.2 Part Numbers...................................................................................... 2 1.3 USB Compliant ......................................................................
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 10.5 11 Solder Reflow Profile ..................................................................... 32 Contact Information ................................................................... 33 Appendix A - References ............................................................................ 34 Appendix B - List of Figures and Tables .....................................................
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 3 Device Pin Out and Signal Description 3.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Pin No. Name Type Description 4 VCCIO PWR +1.8V to +5.25V supply to the FIFO Interface group pins (1...3, 5, 6, 9...14, 22, 23). In USB bus powered designs connect this pin to 3V3OUT pin to drive out at +3.3V levels, or connect to VCC to drive out at 5V CMOS level. This pin can also be supplied with an external +1.8V to +2.8V supply in order to drive outputs at lower levels.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Pin No. Name Type Description 11 D3 I/O FIFO Data Bus Bit 3 12 PWREN# Output Goes low after the device is configured by USB, then high during USB suspend. Can be used to control power to external logic P-Channel logic level MOSFET switch. Enable the interface pull-down option when using the PWREN# pin in this way. Should be pulled to VCCIO with 10kΩ resistor.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 3.3 QFN-32 Package D7 Figure 3.2 QFN-32 Package Pin Out and schematic symbol 3.4 QFN-32 Package Signal Description Pin No. Name Type Description 14 USBDP I/O USB Data Signal Plus, incorporating internal series resistor and 1.5kΩ pull up resistor to +3.3V. 15 USBDM I/O USB Data Signal Minus, incorporating internal series resistor. Table 3.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Pin No. Name Type Description 1 VCCIO PWR +1.8V to +5.25V supply for the FIFO Interface group pins (2, 3, 6,7,8,9,10 11, 21, 22, 30,31,32). In USB bus powered designs connect this pin to 3V3OUT to drive out at +3.3V levels, or connect to VCC to drive out at +5V CMOS level. This pin can also be supplied with an external +1.8V to +2.8V supply in order to drive out at lower levels.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Pin Name Type Description 6 D5 I/O FIFO Data Bus Bit 5 7 D6 I/O FIFO Data Bus Bit 6 8 D3 I/O FIFO Data Bus Bit 3 PWREN# Output Goes low after the device is configured by USB, then high during USB suspend. Can be used to control power to external logic P-Channel logic level MOSFET switch. Enable the interface pull-down option when using the PWREN# pin in this way.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 3.5 FT245R FIFO READ Timing Diagrams T6 T5 RXF# T2 T1 RD# T4 T3 D[7...0] Valid Data Figure 3.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 3.6 FT245R FIFO WRITE Timing Diagrams T12 T11 TXE# T8 T7 WR T9 D[7...0] T10 Valid Data Figure 3.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 4 Function Description The FT245R is a USB to parallel FIFO interface device which simplifies USB to FIFO designs and reduces external component count by fully integrating an external EEPROM, USB termination resistors and an integrated clock circuit which requires no external crystal, into the device.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 4.2 Functional Block Descriptions The following paragraphs detail each function within the FT245R. Please refer to the block diagram shown in Figure 2.1. Internal EEPROM. The internal EEPROM in the FT245R is used to store USB Vendor ID (VID), Product ID (PID), device serial number, product description string and various other USB configuration descriptors.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 5 Devices Characteristics and Ratings 5.1 Absolute Maximum Ratings The absolute maximum ratings for the FT245R devices are as follows. These are in accordance with the Absolute Maximum Rating System (IEC 60134). Exceeding these may cause permanent damage to the device.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 5.2 DC Characteristics DC Characteristics (Ambient Temperature = -40°C to +85°C) Parameter Description Minimum Typical Maximum Units Conditions VCC1 VCC Operating Supply Voltage 4.0 --- 5.25 V Using Internal Oscillator VCC1 VCC Operating Supply Voltage 3.3 --- 5.25 V Using External Crystal VCC2 VCCIO Operating Supply Voltage 1.8 --- 5.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Parameter Description Minimum Typical Maximum Units Conditions Voh Output Voltage High 2.1 2.6 2.8 V I source = 1mA Vol Output Voltage Low 0.3 0.4 0.5 V I sink = 2mA Vin Input Switching Threshold 1.0 1.2 1.5 V ** VHys Input Switching Hysteresis 20 25 30 mV ** Table 5.5 FIFO I/O Pin Characteristics (VCCIO = +2.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Parameter Description Minimum Typical Maximum Units Conditions Voh Output Voltage High 2.1 2.6 2.8 V I source = 3mA Vol Output Voltage Low 0.3 0.4 0.5 V I sink = 8mA Vin Input Switching Threshold 1.0 1.2 1.5 V ** VHys Input Switching Hysteresis 20 25 30 mV ** Table 5.9 FIFO I/O Pin Characteristics (VCCIO = +2.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Parameter Description Minimum Typical Maximum Units Conditions UDrvZ Driver Output Impedance 26 29 44 Ohms See Note 1 Table 5.12 USB I/O Pin (USBDP, USBDM) Characteristics Note 1: Driver output impedance includes the internal USB series termination resistors on USBDP and USBDM pins 6.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 7 USB Power Configurations The following sections illustrate possible USB power configurations for the FT245R. The illustrations have omitted pin numbers for ease of understanding since the pins differ between the FT245RL and FT245RQ package options. All USB power configurations illustrated apply to both package options for the FT245R device.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 7.2 Self Powered Configuration Figure 7.2 Self Powered Configuration Figure 7.2 illustrates the FT245R in a typical USB self powered configuration. A USB self powered device gets its power from its own power supply, VCC, and does not draw current from the USB bus.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 7.3 USB Bus Powered with Power Switching Configuration P-Channel Power MOSFET s Switched 5V Power to External Logic d g 0.1uF 0.1uF Soft Start Circuit 1k Ferrite Bead 1 D0 5V VCC VCC D1 2 USBDM 3 USBDP D2 D3 4 VCCIO + FT245R D4 NC 5 10nF D5 RESET# SHIELD NC D6 OSCI D7 OSCO GND TXE# 5V VCC RXF# 100nF 4.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 v) PWREN# gets its VCC from VCCIO. For designs using 3V3 logic, ensure VCCIO is not powered down using the external logic. In this case use the +3V3OUT. 7.4 USB Bus Powered with Selectable External Logic Supply 3.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 8 Application Examples The following sections illustrate possible applications of the FT245R. The illustrations have omitted pin numbers for ease of understanding since the pins differ between the FT245RL and FT245RQ package options. 8.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 8.2 Using the External Oscillator The FT245R defaults to operating using its own internal oscillator. This requires that the device is powered with VCC (min)=+4.0V. This supply voltage can be taken from the USB VBUS. Applications which require using an external oscillator, VCC= +3.3V must do so in the following order: 1. When device powered for the very first time, it must have VCC > +4.0V.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 9 Internal EEPROM Configuration Following a power-on reset or a USB reset the FT245R will scan its internal EEPROM and read the USB configuration descriptors stored there. The default factory programmed values of the internal EEPROM are shown in Table 9.1 Default Internal EEPROM Configuration.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 10 Package Parameters The FT245R is available in two different packages. The FT245RL is the SSOP-28 option and the FT245RQ is the QFN-32 package option. The solder reflow profile for both packages is described in Section 0. 10.1 SSOP-28 Package Dimensions 7.80 +/-0.40 5.30 +/-0.30 2.00 Max 1.25 +/-0.12 12° Typ 10.20 +/-0.30 14 0.05 Min FTDI FT245RL 0.65 +/-0.026 YYXX-A XXXXXXXXXXXX 1.02 Typ. 0.30 +/-0.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 10.2 QFN-32 Package Dimensions 32 25 1 8 FTDI 5.000 +/-0.075 Indicates Pin #1 ( Laser Marked) 24 YYXX-A XXXXXXX FT245RQ 9 17 16 5. 000 +/-0. 075 9 0. 500 0.250 +/-0.050 Pin# 1 ID 10 11 12 13 14 15 16 0. 150 Max 8 17 7 18 6 19 5 20 4 21 3 22 2 23 1 24 32 31 30 29 28 27 26 3.200 +/-0.100 Central Heat Sink Area 0. 200 Min 25 0.500 +/-0.050 3. 200 +/-0. 100 0. 900 +/-0.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 10.3 QFN-32 Package Typical Pad Layout 2.50 25 0.150 Max 1 0.500 3.200 +/-0.100 0.30 Optional GND Connection 3.200 +/-0.100 Optional GND Connection 0.20 2.50 17 0.200 Min 0.100 9 0.500 +/-0.050 Figure 10.3 Typical Pad Layout for QFN-32 Package 10.4 QFN-32 Package Typical Solder Paste Diagram 2.5 +/- 0.0375 2.5 +/- 0.0375 Figure 10.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 10.5 Solder Reflow Profile The FT245R is supplied in Pb free 28 LD SSOP and QFN-32 packages. The recommended solder reflow profile for both package options is shown in 0. Temperature, T (Degrees C) tp Tp Critical Zone: when T is in the range TL to Tp Ramp Up TL tL TS Max Ramp Down TS Min tS Preheat 25 T = 25º C to TP Time, t (seconds) Figure 10.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 11 Contact Information Head Office – Glasgow, UK Future Technology Devices International Limited Unit 1, 2 Seaward Place, Centurion Business Park Glasgow G41 1HH United Kingdom Tel: +44 (0) 141 429 2777 Fax: +44 (0) 141 429 2758 E-mail (Sales) E-mail (Support) E-mail (General Enquiries) Web Site URL Web Shop URL sales1@ftdichip.com support1@ftdichip.com admin1@ftdichip.com http://www.ftdichip.com http://www.ftdichip.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Appendix A - References Useful Application Notes http://www.ftdichip.com/Documents/AppNotes/AN232R-01_FT232RBitBangModes.pdf http://www.ftdichip.com/Documents/AppNotes/AN_107_AdvancedDriverOptions_AN_000073.pdf http://www.ftdichip.com/Documents/AppNotes/AN232R-02_FT232RChipID.pdf http://www.ftdichip.com/Documents/AppNotes/AN_121_FTDI_Device_EEPROM_User_Area_Usage.pdf http://www.ftdichip.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Appendix B - List of Figures and Tables List of Figures Figure 2.1 FT245R Block Diagram ................................................................................................... 4 Figure 3.1 SSOP Package Pin Out and Schematic Symbol ................................................................... 7 Figure 3.2 QFN-32 Package Pin Out and schematic symbol .....................................................
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Table 5.11 RESET# and TEST Pin Characteristics ............................................................................ 20 Table 5.12 USB I/O Pin (USBDP, USBDM) Characteristics ................................................................. 21 Table 5.13 EEPROM Characteristics ............................................................................................... 21 Table 5.
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Document No.: FT_000052 FT245R USB FIFO IC Datasheet Version 2.12 Clearance No.: FTDI# 39 Appendix C - Revision History Version 0.90 Initial Datasheet Created August 2005 Version 0.94 Revised Pre-release datasheet October 2005 Version 1.00 Full datasheet released December 2005 Version 1.02 Minor revisions to datasheet released December 2005 Version 1.03 Manufacturer ID added to default EEPROM data January 2006 Version 1.04 Buffer sizes added January 2006 Version 1.