Document No.: FT_000329
FT232BL/BQ USB UART IC Datasheet Version 2.2
Clearance No.: FTDI# 171
Appendix C – Revision History
Version 1.0
Version 1.1
Initial document created
30 April 2002.
Section 3.2 RESET# Pin description corrected
(RESET# does not have an internal 200k pull-up to
VCC as previously stated).
04 August 2002
Section 3.1, figure 2 pin-out corrected (EECS = Pin 32).
Version 1.2
Pin and package naming made consistent throughout data sheet.
Section 1.1 Updated to reflect availability of Mac OS X driver.
Section 4.1 Minor corrections.
27 October 2003
Section 4.2 Minor changes to functional block descriptions of SIE,
RESET Generator, and EEPROM interface.
Section 3.2 Note added to EEPROM interface group.
Section 3.2 RSTOUT# Pin description amended.
Section 5.2 Minimum operating supply voltage adjusted.
Section 5.2 EESK added to Note 3.
Section 5.2 UART IO pin characteristics amended.
Section 5.2 RESET#, TEST, EECS, EESK, and EEDATA pin
characteristics amended.
Section 5.2 RSTOUT pin characteristics amended.
Section 7.1 Updated recommended ceramic resonator part number
and circuit configuration.
Section 6.2 “USB Self Powered Configuration (1)”
(original figure 8 removed). Recommended circuit for USB self
Powered designs updated. Subsequent figure numbers have
changed as a result.
Section 6.3.1 Note added to description of Bus powered circuit with
3.3V logic drive / supply voltage.
Section 7.6 Self Powered Circuit with 3.3V logic drive / supply
voltage added (new figure 16).
Version 1.3
Version 1.4
Section 10 Package drawing amended
10 December 2003
10 February 2004
Section 5.1 Floor Life / Relative Humidity specification
added. ESD and Latch Up specifications amended.
Section 7.1 Required resonators / crystal accuracy corrected.
Grammar Corrections
Section 11 FTDI Address Updated
Section 4.1 Extended EEPROM Support corrected
Section 3.2 VCCIO Pin description amended.
Section 8.3 RS485 Example Sipex SP481 part number corrected.
Version 1.5
Version 1.6
Section 3.2 EESK Pin Description amended.
Section 6.3.1 Figure 16 PWRCTL Pin number corrected.
Section 6.4 Figure 15 PWREN# Pin number corrected.
April 2004
Section 1.1 WinCE drivers now available.
Section 10 Date code format updated.
November 2004
Section 5.1 Absolute Maximum Ratings table reformatted.
Version 1.7
Section 1.1 D2XX drivers for Linux and Windows CE now available
Section 10 FT232BL (lead Free) and FT232BQ
February 2005
(lead free QFN package) now available.
Version 1.8
Version 1.9
Section 1.1 Driver OS Support updated.
Section 5.1 USB Data line absolute maximum rating added.
December 2005
9th August 2010
Reformatted and make one datasheet for two Ics
(FT232BL and FT232BQ)
Updated to remove references to isochronous support
Edited contact details
Added Window 7 and Vista support
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