FT240X USB 8-BIT FIFO IC Datasheet
Version 1.4
Document No.: FT_000626 Clearance No.: FTDI# 259
Future Technology
Devices International Ltd
.
FT240X
(USB 8-BIT FIFO IC)
The FT240X 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 2048 byte multi-time-
programmable (MTP) memory, storing device
descriptors and FIFO I/O configuration.
Fully integrated clock generation with no
external crystal required plus optional clock
output selection enabling glue-less interface to
external MCU or FPGA.
Data transfer rates up to 1Mbyte / second.
512 byte receive buffer and 512 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.
Configurable FIFO interface I/O pins.
Synchronous and
interface options.
asynchronous
bit
bang
USB Battery Charger Detection. Allows for USB
peripheral devices to detect the presence of a higher
power source to enable improved charging.
Device supplied pre-programmed with unique USB serial
number.
USB Power Configurations; supports bus- powered, self-
powered and bus-powered with power switching.
Integrated +3.3V level converter for USB I/O.
True 3.3V CMOS drive output and TTL input; operates
down to 1V8 with external pull-ups.
Configurable I/O pin output drive strength; 4 mA(min)
and 16 mA(max).
Integrated power-on-reset circuit.
Fully integrated AVCC supply filtering - no external
filtering required.
+5V Single Supply Operation.
Internal 3V3/1V8 LDO regulators
Low operating and USB suspend current; 8mA (active-
typ) and 125uA (suspend-typ).
UHCI/OHCI/EHCI host controller compatible.
USB 2.0 Full Speed capable.
Extended operating temperature range; -40 to 85⁰C.
Available in compact Pb-free 24 Pin SSOP and QFN-24
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
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.4
Document No.: FT_000626 Clearance No.: FTDI# 259
1 Typical Applications
Upgrading Legacy Peripherals to USB
Utilising USB to add system modularity
Incorporate USB
transfers
for
communication
interface to enable PC
development
system
USB Industrial Control
USB MP3 Player Interface
USB FLASH Card Reader and Writers
Set Top Box PC - USB interface
USB Digital Camera Interface
USB Software
Dongles
and
Hardware
Encryption
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
USB Smart Card Readers
USB Instrumentation
USB dongle implementations for Software/
Hardware Encryption and Wireless Modules
Provides detection of dedicated charging ports
for charging batteries in portable devices.
1.1 Driver Support
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Windows 10 32, 64-bit
Windows 8 / 8.1 32, 64-bit
Windows 7 32,64-bit
Windows Vista and Vista 64-bit
Windows XP and XP 64-bit
Windows XP Embedded
Server XP / 2003 /2008 / 2016
Windows CE 4.2-5.2, 6.0/7.0, 2013
Mac OS-X
Linux 3.2 and greater
Android
Royalty free D2XX
Direct
Drivers
(USB Drivers + DLL S/W Interface)
Windows 10 32, 64-bit
Windows 8 / 8.1 32, 64-bit
Windows 7 32,64-bit
Windows Vista and Vista 64-bit
Windows XP and XP 64-bit
Windows XP Embedded
Server XP / 2003 /2008 / 2016
Windows CE 4.2-5.2, 6.0/7.0, 2013
Mac OS-X
Linux 3.2 and greater
Android
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
http://www.ftdichip.com/Documents/InstallGuides.htm
1.2 Part Numbers
Part Number
FT240XQ-x
FT240XS-x
Note:
Packaging codes for x is:
-R: Taped and Reel, (SSOP is 3,000pcs per reel, QFN is 5,000pcs per reel).
- U: Tube packing, 58pcs per tube (SSOP only)
- T: Tray packing, 490pcs per tray (QFN only)
For example: FT240XQ-R is 5,000pcs taped and reel packing
Copyright © Future Technology Devices International Limited
2
Package
24 Pin QFN
24 Pin SSOP
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.4
Document No.: FT_000626 Clearance No.: FTDI# 259
1.3 USB Compliant
The FT240X is fully compliant with the USB 2.0 specification and has been given the USB-IF Test-ID (TID)
40001337 (Rev B).
Copyright © Future Technology Devices International Limited
3
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.4
Document No.: FT_000626 Clearance No.: FTDI# 259
2 FT240X Block Diagram
VCC
1V8 Internal
Core Supply
3.3 Volt LDO
Regulator
1.8 Volt LDO
Regulator
3V3OUT
FIFO RX Buffer
(512 bytes)
VCCIO
USBDP
USBDM
USB
Transceiver
with
Integrated
1.5k pullups
and battery
charge
detection
Serial Interface
Engine
(SIE)
USB
Protocol Engine
FIFO Interface
Controller
DATA[0]
DATA[1]
DATA[2]
DATA[3]
DATA[4]
DATA[5]
DATA[6]
DATA[7]
Internal MTP
Memory
RXF#
TXE#
RD#
WR
SIWUA
CBUS5
CBUS6
USB DPLL
FIFO TX Buffer
(512 bytes)
3V3OUT
Internal
12MHz
Oscillator
RESET#
X4 Clock
Multiplier
48MHz
To USB Transceiver Cell
Reset
Generator
GND
Figure 2.1 FT240X Block Diagram
For a description of each function please refer to
Section 4.
Copyright © Future Technology Devices International Limited
4
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.4
Document No.: FT_000626 Clearance No.: FTDI# 259
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
3.7
FT240X Block Diagram .................................................. 4
Device Pin Out and Signal Description ........................... 7
24-LD SSOP Package.................................................................. 7
SSOP Package Pin Out Description ............................................. 7
QFN-24 Package ...................................................................... 10
QFN-24 Package Signal Description ......................................... 10
CBUS Signal Options ................................................................ 12
FT240X FIFO READ Timing Diagrams ....................................... 13
FT240X FIFO WRITE Timing Diagrams ..................................... 14
4
4.1
4.2
Function Description ................................................... 15
Key Features ............................................................................ 15
Functional Block Descriptions .................................................. 16
5
5.1
5.2
5.3
5.4
5.5
Devices Characteristics and Ratings ............................ 17
Absolute Maximum Ratings ...................................................... 17
ESD and Latch-up Specifications .............................................. 17
DC Characteristics .................................................................... 18
MTP Memory Reliability Characteristics ................................... 21
Internal Clock Characteristics .................................................. 22
6
6.1
6.2
6.3
USB Power Configurations ........................................... 23
USB Bus Powered Configuration ............................................. 23
Self Powered Configuration ..................................................... 24
USB Bus Powered with Power Switching Configuration ........... 25
7
7.1
7.2
Application Examples .................................................. 27
USB to MCU FIFO Interface ...................................................... 27
Battery Charge Detection ......................................................... 27
8
8.1
Internal MTP Memory Configuration ............................ 30
Default Values ......................................................................... 30
5
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