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future technology devices international limited (ftdi) unit1, 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 (support): support1@ftdichip.com web: http://www.ftdichip.com copyright ? 20 11 future technology devices international limited neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or re produced in any material or electronic form without the prior written consent of the copyright holder. this product and its documen tation 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 fa ilure 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 injur y. 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, uni t1, 2 seaward place, centurion business park, glasgow, g41 1hh, united kingdom. scotland registered number: sc136640 copyright ? 201 1 future technology devices international limited future technology devices international ltd usb to rs232 uart serial converter pcb datasheet doc ument ref erence no. : ft_000079 version 1.41 issue date: 2011 - 01 - 26
copyright ? 201 1 future technology devices international limited 1 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 1 description t he usb - rs232 - pcb is a usb to rs232 level serial uart converter pcb incorporating ftdis ft232 rq usb to s erial uart interface ic dev ice which handles all the usb signalling and protocols. the pcb provide s a fast, simple way to connect devices with a rs232 level serial interface to usb. each usb - rs232 - pcb contains a small internal electronic circuit board , utilis ing the ft232r plus a usb type - a connector. the ft232r datasheet, ds_ft23 2r , is available at http://www.ftdichip.com . the integrated electronics also include an rs232 level shifter plus tx and rx leds which give a visual indication of uart traffic. all co mponents used, including the ft232r are pb - free (rohs compliant). the pcb is usb powered and usb 2.0 full speed compatible. each pcb supports a data transfer rate up to 1 mbaud and supports the ftdichip - id?, with a unique usb serial number programmed into the ft232r . this feature can be used to create a security or password protected file transfer access using the pcb . further information and examples on this feature are available at http://www.ftdichip.com under ftdichip - id projects . the usb - rs232 - pcb require s usb drivers, available free from http://www.ftdichip.com , whi ch are used to make the ft232r on the pcb appear as a virtual com port (vcp) . this then allows the user to communicate with the usb interface via a standard pc serial emulation port ( for example tty). another ftdi usb driver, the d2xx driver, can also be used with application software to directly access the ft232r on the pcb though a dll. this is illustrated in the figure 1 . 1 . figure 1 . 1 using the usb - rs232 - pcb 1.1 part number the following table 1 . 1 gives details of the available usb - rs232 - pcb . part number description usb - rs232 - pcb usb to rs232 level uart pcb table 1 . 1 usb - rs232 - pcb part number v c p t t y u s b u s b - r s 2 3 2 - p c b v i r t u a l c o m p o r t s o f t w a r e a p p l i c a t i o n a c c e s s t o u s b v i a d 2 x x u s b t t y d 2 x x d l l r s 2 3 2 u a r t s i g n a l s u s b - r s 2 3 2 - p c b r s 2 3 2 u a r t s i g n a l s
copyright ? 201 1 future technology devices international limited 2 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 1.2 usb compliant the usb - rs232 - pcb is fully compliant with the usb 2.0 specification .
copyright ? 201 1 future technology devices international limited 3 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 table of content s 1 descri ption ................................ ................................ ..................... 1 1.1 part number ................................ ................................ ................................ .. 1 1.2 usb compliant ................................ ................................ .............................. 2 the usb - rs232 - pcb is fully compliant with the usb 2.0 specification. ................... 2 2 typical applications ................................ ................................ ........ 4 2.1 driver support ................................ ................................ .............................. 4 2.2 features ................................ ................................ ................................ ........ 5 3 features of ft232r applicable to usb - rs 232 - pcb ......................... 6 4 usb - rs232 - pcb connector pin out and mechanical details ............ 7 4.1 usb - rs232 - pcb signal descriptions ................................ ............................. 9 4.2 usb - rs232 - pcb +5v/+3.3v selection ................................ .......................... 9 4.3 usb - rs232 - pcb electrical parameters ................................ ........................ 10 5 usb - rs232 - pcb circuit schematic ................................ ............... 11 6 contact information ................................ ................................ ..... 12 appendix a - pcb eeprom configuration ................................ ........... 13 appendix b - list of figures and tables ................................ .............. 14 appendix c - revision history ................................ ............................ 15
copyright ? 201 1 future technology devices international limited 4 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 2 typical applications usb to serial rs232 level converter . upgrading legacy peripherals to usb . interface microcontroller uart or i/o to usb . interface fpga / pld to usb . u sb instrumentation pc interface . usb industrial control . usb password protected file transfers. 2.1 driver support royalty free virtual com port (vcp) drivers for... windows 98, 98se, me, 2000, server 2003, xp and server 2008 windows xp and xp 64 - bit windows vista and vista 64 - bit windows xp embedded windows ce 4.2, 5.0 and 6.0 mac os 8/9, os - x linux 2.4 and greater r oyalty free d2xx direct drivers (usb drivers + dll s/w interface) windows 98, 98se, me, 2000, server 2003, xp and server 2008 windows xp and xp 64 - bit windows vista and vista 64 - bit windows xp embedded windows ce 4.2, 5.0 and 6.0 linux 2.4 and greater mac os - x the drivers listed above are all available to download for free from www.ftdichip.com . various 3rd party drivers are also available for various other operating systems - see www.ftdichip.com for details.
copyright ? 201 1 future technology devices international limited 5 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 2.2 f ea t ures usb - rs232 - pcb provides a usb to rs232 serial uart interface . entire usb protocol handled by the electronics on the pcb . eia/tia - 232 and v. 28/v.24 communication interface with low power requirements. uart interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity. fully assisted hardware (rts#/cts#) or x - on / x - off software handshaking. da ta transfer rates up to 1 mbaud . internal eeprom with user writeable area. ftdis royalty - free vcp allow for communication as a standard emulated com port and d2xx direct drivers provide dll application programming interface. support for ft232r ftdichip - id? feature for improved security. pcb is usb powered - no external supply require d. 6 outputs provide t x, rx, rts#, cts#, power and gnd. low usb bandwidth consumption. uhci / ohci / ehci host controller compatible . usb 2.0 full speed compatible. - 40c to +85c operating temperature range. esd protection for rs - 232 i/o's 15kv human bod y model (hbm) 15kv en61000 - 4 - 2 air gap discharge 8kv en61000 - 4 - 2 contact discharge
copyright ? 201 1 future technology devices international limited 6 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 3 features of ft232r applicable to usb - rs232 - pcb the usb - rs232 - pcb use s ftdis ft232rq usb to serial ic device. this section summarises the key features of the ft232rq which apply to the usb - rs232 - pcb . for further details, and a full features and enhancements description consult the ft232r datasheet, this is available from www.ftdichip.com . internal eeprom. the internal eeprom is used to store usb vendor id (vid), product id (pid), device serial number, product description string and various other us b configuration descriptors. each ft232rq is supplied with the internal eeprom pre - programmed as described in appendix a - pcb eeprom configuration . the internal eeprom descriptors can be programmed in circuit, over usb without any additional voltage requirement. it can be programmed using the ftdi utility software called mprog, which c an be downloaded from ftdi utilities on the ftdi website ( www.ftdichip.com ). a dditionally, there is a user area of the int ernal eeprom available to system desig ners to allow storing of data (note that this is not modified by mprog) . lower operating and suspend current . the ft232r has a low 15ma operating supply current and a very low usb suspend current of approximately 70a. low usb bandwidth consumption . the usb interface of the ft232r , and therefore the usb - rs232 - pcb has been designed to use as little as possible of the total usb bandwidth available from the usb host controller. uart pin signal inversion . the sense of each of the uart signals can be individually inverted by configuring option s in the internal eeprom. for example cts# (active low) can be changed to cts (active high), or txd can be changed to txd#. ftdichip - id? . the ft232r includes the new ft dichip - id? security dongle feature. this ftdichip - id? feature allows a unique number to be burnt into each ft_232rq during manufacture. this number cannot be reprogrammed. this numb er is only readable over usb can be used to form the basis of a security do ngle which can be used to protect any customer application software being copied. this allows the possibility of using the usb - rs232 - pcb as a dongle for software licensing. further to this, a renewable license scheme can be implemented based on the ftdichi p - id? number when encrypted with other information. this encrypted number can be stored in the user area of the ft232r internal eeprom, and can be decrypted, then compared with the protected ftdichip - id? to verify that a license is valid. web based applica tions can be used to maintain product licensing this way. an application note, an232r - 02 , available from ftdi website ( www.ftdichip.com ) describes this feature. extended operating temperature range - the usb - rs232 - pcb is capable of operating over an extended temperature range of - 40o to +85oc thus allowing it to be used in automotive or industrial applications.
copyright ? 201 1 future technology devices international limited 7 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 4 usb - rs232 - pcb connector pin out and mechanical details figure 4 . 1 usb - rs232 - pcb pin out (top is top view, bottom is bottom view) changes made from rev1 to rev 2 design : - pad designation changed between rev1 and rev2 (see figure 4.1) - r1 doesnt exist in rev2 design, the selection of power signal is done using either r2 ( +3.3v ) or r3 ( +5v ) , (s ee t able 4.2 ) - the ledtx, ledrx, pwren and sleep are connected to the ft232r differently (s ee schematic ) the mechanical details of the pcb are shown in the following diagram f igure 4 . 2 u s b - r s 2 3 2 - p c b r e v 1 l e v e l s h i f t e r g r n l e d r e d l e d f t 2 3 2 r c t s g n d t x r x p o w e r r t s u s b - r s 2 3 2 - p c b r e v 2 l e v e l s h i f t e r g r n l e d r e d l e d f t 2 3 2 r r t s p o w e r r x c t s g n d t x
copyright ? 201 1 future technology devices international limited 8 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 f igure 4 . 2 usb - rs232 - pcb , mechanical details 2 4 . 9 + / - 0 . 4 1 . 6 4 0 . 1 + / - 0 . 2 1 1 . 8 5 + / - 0 . 3 5 1 1 . 8 5 + / - 0 . 3 5 1 8 . 8 + / - 0 . 2 4 . 5 + / - 0 . 0 1 4 . 9 + / - 0 . 1 d i m e n s i o n s i n m m
copyright ? 201 1 future technology devices international limited 9 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 4.1 usb - rs232 - pcb signal descriptions name type description gnd gnd device ground supply pin. cts# input clear to send control input / handshake signal. power output power output. default is gnd, but can be customised to output +3.3v or +5v. if required, contact ftdi sales te am (sales1@ftdichip.com) txd output transmit asynchronous data output. rxd input receive asynchronous data input. rts# output request to send control output / handshake signal. table 4 . 1 usb - rs232 - pcb signal descriptions 4.2 usb - rs232 - pcb +5v/+3.3v selection selection of whether the power signal is gnd, +3.3v or +5v is done using resistors. the following table gives details of what res istors are required for the different voltage levels. resistor r2 resistor r3 description not fitted not fitted vcc floats fitted not fitted power signal is +3.3v not fitted fitted power signal is +5.0v table 4 . 2 uart signal level selection
copyright ? 201 1 future technology devices international limited 10 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 4.3 usb - rs232 - pcb electrical parameters parameter description minimum typical maximum units conditions vcc _5v output power voltage * 4.25 5.0 * 5.25 v *default is gnd. this figure only applies when cable has been customised to output +5v. the range is d ependent on the usb port that the usb - rs232 - we is connected to vcc _3.3v output power voltage ** 3.2 3.3** 3.4 v **default is gnd. this figure only applies when cable has been customised to output +3.3v. i o output power current *** - 75 ma ***only applies when power output is customised to +5v or+3.3v must be less that 2.5ma during suspend. t operating temperature range - 40 +85 o c table 4 . 3 usb - rs232 - pcb parameter description minimum typical maximum units conditions v trans rs232 transmitter output voltage swing +/ - 5 +/ - 6.5 +/ - 15 v vrec rs232 receiver input voltage range - 25 +25 v table 4 . 4 usb - rs232 - pcb i/o pin characteristics description conditions minimum typical maximum esd hbm rs - 232 inputs and outputs 15 kv en61000 - 4 - 2contactdischarge rs - 232 inputs and outputs 8 kv en61000 - 4 - 2airgapdischarge rs - 232 inputs and outputs 15 kv table 4 . 5 usb - rs232 - we esd tolerance
copyright ? 201 1 future technology devices international limited 11 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 5 usb - rs232 - pcb circuit schematic the circuit schematic of the usb - rs232 - pcb , utilising the ftdi ft232r, is shown in figure 5 . 1 figure 5 . 1 circuit schematic of usb - rs232 - pcb .
copyright ? 201 1 future technology devices international limited 12 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 6 contact information head office C glasgow, uk future technology devices international limited unit 1, 2 seaward place, centurion business park glasgow g 41 1hh united kingdom tel: +44 (0) 141 429 2777 fax: +44 (0) 141 429 2758 e - mail (sales) sales 1 @ftdichip.com e - mail (support) support 1 @ftdichip.com e - mail (general enquiries) admin1@ftdichip.com web site url http://www.ftdichip.com web shop url http://www.ftdichip.com branch office C taipei, taiwan future technolog y devices international limited (taiwan) 2f, no. 516, sec. 1, neihu road taipei 114 taiwan , r.o.c. tel: +886 (0) 2 879 1 3570 fax: +886 (0) 2 87 9 1 3576 e - mail (sales) tw.sales1@ftdichip.com e - mail (support) tw.support1@ftdichip.com e - mail (general e nquiries) tw.admin1@ftdichip.com web site url http://www.ftdichip.com branch office C hillsboro, oregon, usa future technology devices international limited (usa) 7235 nw evergreen parkway, suite 600 hillsboro, or 97123 - 580 3 usa tel: +1 (503) 547 0988 fax: +1 (503) 547 0987 e - mail (sales) us.sales@ftdichip.com e - mail (support) us.support@ftdichip.com e - mail (general enquiries) us.admin@ftdichip.com web site url http://www.ftdichip.com branch office C shanghai , china future technology devices international limited ( china ) room 408 , 317 xianxia road, shanghai, 200051 china tel: +86 21 62351596 fax: +86 21 62351595 e - mail (sales) cn .sales@ftdichip.com e - mail (support) cn.support@ftdichip.com e - mail (general enquiries) cn .admin@ftdichip.com web site url http://www.ftdichip.com distributor and sales representatives please visit the sales network page of the ftdi web site for the contact details of our distributor(s) and sales representative(s) in your country.
copyright ? 201 1 future technology devices international limited 13 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 appendix a - pcb eeprom configuration each usb - rs232 - pcb is controlled by the ftdi ft232r ic. this ft232r device contains an eeprom which contains the usb configuration descriptors for that device. when the pcb is plugged into a pc or a usb reset is performed, the pc will read these descriptors. the default values stored into the intern al eeprom are defined in table 0 . 1 default internal eeprom configuration parameter value notes usb vendor id (vid) 0403h ftdi default vid (hex) usb product ud (pid) 6001h ftdi default pid (hex) serial number enabled? yes serial number see note a unique serial number is generated and programmed into the eeprom during device final test. pull down i/o pins in usb suspend disabled enabling this option will make the device pull down on the uart interface lines when the power is shut off (pwren# is high). manufacturer name ftdi product description see note usb - rs232 - pcb max bus power current 90ma power source bus powered device type ft232r usb version 0200 returns usb 2.0 device description to the host. note: the device is be a usb 2.0 full speed device (12mb/s) as opposed to a usb 2.0 high speed device (480mb/s). remote wake up dis abled high current i/os en abled enables the high drive level on the uart and cbus i/o pins. load vcp driver en abled makes the device load the vcp driver interface for the device. invert txd disabled signal on this pin becomes txd# if enable. invert rxd disabled signal on this pin becomes rxd# if enable. invert rts# disabled signal on this pin becomes rts if enable. invert cts# disabled signal on this pin becomes cts if enable. table 0 . 1 default internal eeprom configuration the internal eeprom on the pcb can be re - programmed over usb using the utility program mprog. mprog can be downloaded from the www.ftdichip.com . version 2.8a or later is re quired for the ft232r chip. users who do not have their own usb vendor id but who would like to use a unique product id in their design can apply to ftdi for a free block of unique pids. contact ftdi support for this service.
copyright ? 201 1 future technology devices international limited 14 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 appendix b - list of figures a nd tables list of figures figur e 1.1 using the usb - rs232 - pcb ................................ ................................ .............. 1 figure 4.1 usb - rs232 - pcb pin out (top is top view, bottom is bottom view) .................... 7 figure 4.2 usb - rs232 - pcb, mechanical details ................................ ................................ . 8 figure 5.1 circuit schematic of usb - rs232 - pcb. ................................ ............................. 11 lis t of tables table 1.1 usb - rs232 - pcb part number ................................ ................................ ........... 1 table 4.1 usb - rs232 - pcb signal descriptions ................................ ................................ .. 9 table 4.2 uart signal level selection ................................ ................................ .............. 9 table 4.3 usb - r s232 - pcb ................................ ................................ ............................ 10 table 4.4 usb - rs232 - pcb i/o pin characteristics ................................ ........................... 10 table 4.5 usb - rs232 - we esd tolerance ................................ ................................ ........ 10 table 0.1 default internal eeprom configuration ................................ ............................ 13
copyright ? 201 1 future technology devices international limited 15 document reference no.: ft_000079 usb to rs232 uart serial converter pcb datasheet version 1.41 clearance no.: ftdi# 52 appendix c - revision history version draft first draft august 2008 version 1.0 first rel ease september 12 th 2008 version 1.1 update to taiwan address october 1 st 2008 version 1.2 update to uk and ch address february 11 th 2009 version 1.3 update to pcb drawings to show rev1 and rev2 april 13 th 2009 version 1.4 update fig ure 5.1 C schematic may 28th 2010 updated section 4 (changes made from rev1 to rev2) updated contact information version 1.41 added the rohs compliant statement in section 1 j anuary 26 th 2011 added section 1.2 usb compliant logo

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