FT245BM, FT245BL, FT245BQ USB FIFO I.C

This device not only adds extra functionality to its predecessor and reduces external component count, but also maintain a high degree of pin compatibility with the original, making it easy to upgrade or cost-reduce existing designs. The FT245BM makes light work of taking your new (or existing) designs to USB as it runs standalone and therefore requires no processor overhead & no embedded USB stack.

As with all FTDI devices the hard work has been done for you, just design in the chip and choose the royalty-free drivers which suit your application best.

The FT245B hooks onto any 8-bit bus (or 4 wire for DSP/FPGA etc) and offers a FIFO presentation to/from the USB without any overhead to provide a full USB Slave interface to your product. All the processing of the USB stack, USB transceiver and signal conditioning is carried out by the FT245B which requires minimal external circuitry, namely; EEPROM, crystal (or ceramic resonantor) and a few resistors and capacitors.

The FT245B can interface to DSP's and u-Processors to offer typical throughputs of 300K-1Mbit/sec depending on application & driver choice.

The Designers Guide provides an excellent guide to choosing the best options for power modes, EEPROM usage and coupled with the datasheet is all the engineer needs to get a design under way.

QUICK LINKS: Evaluation Kits, FAQ's Page.

Specifications		Applications
Single chip USB to parallel FIFO data transfer Interface to MCU/PLD/FPGA via 4 wire interface up to 1M Baud (DLL Drivers) up to 300K Baud (VCP Drivers) 384 Byte Rx buffer/128 Byte Tx buffer Send Immediate pin for best data throughput Auto transmit buffer control for RS485 USB suspend/resume via SLEEP#,RI# pins Support for High Power mode via PWREN# Bit-Bang Mode creates in-built IO port Interfaces to 5V and 3.3V logic Integrated 3.3V regulator for USB IO Integrated Power-On-Reset circuit USB Bulk transfer mode 4.35V to 5.25V single supply operation USB 1.1 compliant, USB 2.0 compatiblE Range of Evaluation modules		Audio products Handheld & scientific equipment External cable adaptors Data loggers Vehicle diagnostic EQUIPMENT Security & Fire Panels Speed Camera Detectors

Resources and Documentation

FT245BL Datasheet Full datasheet for the FT245BL chip with schematic suggestions, pin-outs, footprint and power options. Hosted by FTDI   Revision: V1.7 Dec 2005 24 pages - 537KB FT245BM Datasheet Full datasheet for the FT245BM chip with schematic suggestions, pin-outs, footprint and power options. Hosted by FTDI   Revision: V1.6 Feb 2005 24 pages - 519KB FT245BQ Datasheet Full datasheet for the FT245BQ chip with schematic suggestions, pin-outs, footprint and power options. Hosted by FTDI   Revision: V1.7 Dec 2005 24 pages - 553KB FT245BM Designers Guide Essential reading if you are looking to put the 245BM into a project. Contains example schematics, power options, pin-outs and footprint, fault finding & debug tips. Hosted by FTDI   Revision: V2.0 14 pages - 375KB Apps Note AN232B-01 - Power control & Bit Bang pins Describes the power mode options & behaviour of the I/O pins in Bit-bang Mode. Relevant to FT2232C, FT2232D, FT2232L, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL and FT245BQ devices. Hosted by FTDI   Revision: V1.0 Jan 2002 8 pages - 232KB Apps Note AN232B-02 - Pin States Power Control and Pin states. FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL and FT245BQ devices. Hosted by FTDI   Revision: V2 Jan 2004 8 pages - 83KB Apps Note AN232B-03 - Optimising throughput with D2XX drivers Using the FTDI devices for best throughput effeciency (streaming vs small payload). Relevant to FT232R, FT245R, FT2232C, FT2232D, FT2232L, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM and FT8U245AM devices. Hosted by FTDI   Revision: V1.1 Jan 2006 10 pages - 35KB Apps Note AN232B-04 - Data Throughput, Latency & Handshaking Describes the need for handshaking and buffer control in general. Relevant for FT232R, FT245R, FT2232C, FT2232D, FT2232L, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM and FT8U245AM devices. Hosted by FTDI   Revision: V1.1 Jan 2006 18 pages - 184KB Apps Note AN232B-06 - debugging FT232Bx and FT245Bx Help with debugging FT232Bx and FT245Bx based designs. Relevant to FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL and FT245BQ devices. Hosted by FTDI   Revision: V1.1 Dec 2004 29 pages - 394KB Apps Note AN232B-07 - Configuring FTDI's VCP Drivers Help with Configuring FTDI's VCP Drivers to use Location IDs. Relevant for FT232R, FT245R, FT2232C, FT2232D, FT2232L, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM, FT8U245AM and FT8U245AM devices. Hosted by FTDI   Revision: V1.2 Jan 2006 12 pages - 228KB Apps Note AN232B-08 - Enumerations options for Win98SE Removing enumeration delays with Win98SE. Relevant to FT232R, FT245R, FT2232C, FT2232D, FT2232L, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM and FT8U245AM devices. Hosted by FTDI   Revision: V1.0 3 pages - 125KB Apps Note AN232B-09 - Using Modem Emulation Mode Help with using the Modem Emulation Mode in FTDI's (VCP) Driver. Relevant to FT232R, FT245R, FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM and FT8U245AM devices. Hosted by FTDI   Revision: V2 10 pages - 150KB Apps Note AN232B-10 - Advanced Driver options All you need to know about FTDI drivers (VCP & DLL) including remumber VCP's. Relevant to FT232R, FT245R, FT2232C, FT2232D, FT2232L,  FT232BM, FT232BL, FT232BQ, FT245BM, FT245BL, FT245BQ, FT8U232AM and FT8U245AM devices. Hosted by FTDI   Revision: V2.1 Aug 2006 61 pages - 735KB FTDI D2XX Direct Drivers D2XX drivers allow direct access to the USB device through a DLL.  Application software can access the USB device through a series of DLL function calls. Click here to visit the FTDI website to download the latest version of DLL based drivers for Windows Win98SE, WinME, Win2K, WinXP, Linux. Hosted by FTDI   Web Page FTDI VCP Drivers Latest version of Virtual COM Port drivers for Windows Win98SE, WinME, Win2K, WinXP, Linux, MacOS. Hosted by FTDI   Web Page MPROG FTDI device programmer MProg can erase, program, read and read and parse the EEPROM contents for FT2232C, FT2232D, FT2232L, FT232BM, FT245BM, FT8U232AM and FT8U245AM devices. Clear user interface, save settings to file, multiple device programming. Requires D2XX drivers. Hosted by FTDI   Web Page Revision: 1 FTClean driver removal tool Use this where a driver has been erroneously or incompletely removed, creates the required INI files to perfom auto self-removal of the offendi0gn driver. Hosted by FTDI   Revision: 1 442KB USB View Utility Windows application to display enumersated devices on USB. Useful debug & verification tool for the designer & hi-tech end users. Hosted by FTDI   Revision: 1

Comprehensive Design Support

Versatile Range of Evaluation Kits

The Eval Kits represent the quickest way to get USB under your belt, with many allowing you to get up and running in less than 30 minutes. Volume pricing is available which is flexible enough to mean you could embed a module within your design for minimal time-to-market turnaround. Please speak to the Alpha Micro sales team for your area for volume pricing.

Custom PID service
For volume applications Alpha Micro can provide a Product Identifier (PID) under the FTDI "umbrella scheme" that can be used to personalise a design based on the FT232Bx so that your end user will see your product name in the Windows Install Wizard for extra brand awareness.

There is an added benefit that the driver is tagged to your hardware and cannot be used by other devices. This feature can only be used with FTDI chips, the Vendor ID (VID) must remain untouched. Please contact our sales team for more information on this facility.

Customers should use MPROG to program this feature and any other changes to the default settings within the EEPROM (which must be fitted if this feature is required). MPROG is free to use and performs the programming tasks over the USB.

Ordering Information

PART NUMBER	PACKAGE TYPE	PACK SIZE	RoHS
FT245BM	32 LQFP	250 per tray	NO
FT245BM/TR	32 LQFP	1000 per reel	NO
FT245BL	32 LQFP	250 per tray
FT245BL/TR	32 LQFP	1000 per reel
FT245BQ	32 QFN	250 per tray
FT245BQ/TR	32 QFN	1000 per reel