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serial infrared transceiver sir, 115. 2 kbit/s, 2.4 v to 5.5 v operation tfbs4711 vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 1 description the tfbs4711 is a low profile, infrared data transceiver module. it supports irda ? data rates up to 115.2 kbit/s (sir). the transceiver module consis ts of a pin photodiode, an infrared emitter (ired), and a low-power cmos control ic to provide a total front-end solution in a single package. the device is designed for the low power irda standard with an extended range on-axis up to 1 m. the rxd output pulse width is independent of the optical input pulse width and stays always at a fixed pulse width thus making the device optimum for standard endecs. tfbs4711 has a tri-state output and is floating in shut-down mode with a weak pull-up. the shut down (sd) feature cuts current consumption to typically 10 na. applications ? ideal for battery operated devices ? pdas ? mobile phones ? electronic wallet (irfm) ? notebook computers ? digital still and video cameras ? printers, fax machines, photocopiers, screen projectors ? data loggers ? external infrared adapters (dongles) ? diagnostics systems ? medical and industrial data collection devices ? kiosks, pos, point and pay devices ? gps ? access control ? field programming devices features ? compliant with the latest irda physical layer low power specification (9.6 kbit/s to 115.2 kbit/s) ? small package (h x l x w in mm): 1.9 x 3 x 6 ? typical link distance on-axis up to 1 m ? battery and power management features: > idle current - 70 a typical > shutdown current - 10 na typical > operates from 2.4 v to 5.5 v within specification over full temperature range from - 25 c to + 85 c ? remote control - transmit distance up to 8 m ? tri-state receiver output, floating in shutdown with a weak pull-up ? constant rxd output pulse width (2.2 s typical) ? meets irfm fast connection requirements ? split power supply, an independent, unregulated supply for ired anode and a well regulated supply for v cc ? directly interfaces with various super i/o and controller devices and encoder/decoder such as toim4232 or toim5232 ? qualified for lead (pb)-free and sn/pb processing (msl4) ? compliant to rohs directive 2002/95/ec and in accordance to weee 2002/96/ec 2020 8 parts table part number description qty/reel tfbs4711-tr1 oriented in carrier tape for side view surface mounting 1000 pcs TFBS4711-TR3 oriented in carrier tape for side view surface mounting 2500 pcs tfbs4711-tt1 oriented in carrier tape for top view surface mounting 1000 pcs
tfbs4711 vishay semiconductors serial infrared transcei ver sir, 115.2 kbit/s, 2.4 v to 5.5 v operation www.vishay.com for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com document number: 82633 2 rev. 3.0, 19-nov-10 functional block diagram pinout tfbs4711 weight 50 mg definitions: in the vishay transceiver datasheets the following nomenclature is used for defini ng the irda operating modes: sir: 2.4 kbit/s to 115.2 kbit/s, equivalent to the basic serial infrared standard with the physical layer version irphy 1.0 mir: 576 kbit/s to 1152 kbit/s fir: 4 mbit/s vfir: 16 mbit/s mir and fir were implemented with irphy 1.1, followed by irphy 1.2, adding the sir low power standard. product summary part number data rate (kbit/s) dimensions h x l x w (mm) link distance (m) operating voltage (v) idle supply current (ma) tfbs4711 115.2 1.9 x 3 x 6 0 to ?? 0.7 2.4 to 5.5 0.07 18282 controlled driver push-pull driver gnd txd rxd v cc2 v cc1 amplifier comparator sd logic and control redc 1942 8 pin 1 pin description pin number symbol description i/o active 1 v cc2 ired anode connect ired anode directly to the power supply (v cc2 ). ired current can be decreased by adding a resistor in series between t he power supply and ired anode. a separate unregulated power supply can be used at this pin 2txd this schmitt-trigger input is used to trans mit serial data when sd is low. an on-chip protection circuit disables the led driver if the txd pin is asserted for longer than 100 s. the input threshold voltage adapts to and follows the logic voltage swing defined by the applied supply voltage ihigh 3rxd received data output, push-pull cmos driver output capable of driving standard cmos or ttl loads. during transmission the rxd output is active and mirrors the transmit signal. no external pull-up or pull-dow n resistor is required. fl oating with a weak pull-up of 500 k ? (typ.) in shutdown mode. the voltage sw ing is defined by the applied supply voltage o low 4sd shutdown. the input threshold voltage adapts to and follows the logic voltage swing defined by the applied supply voltage ihigh 5v cc1 supply voltage 6 gnd ground
tfbs4711 serial infrared transceiv er sir, 115.2 kbit/s, 2.4 v to 5.5 v operation vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 3 note (1) reference point ground, pin 6 unless otherwise noted. typical values are for design aid only, not guaranteed nor s ubject to production testing. we apologize to use sometimes in our documentation the abbrevi ation led and the word light emitting diode instead of infrared e mitting diode (ired) for ir-emitters. that is by definition wrong; we are here following just a bad trend. note vishay transceivers operating inside t he absolute maximum ratings are classifi ed as eye safe according the above table. absolute maximum ratings (1) parameter test conditions symbol min. typ. max. unit supply voltage range, transceiver - 0.3 v < v cc2 < 6 v v cc1 - 0.5 + 6 v supply voltage range, transmitter - 0.5 v < v cc1 < 6 v v cc2 - 0.5 + 6 v rxd output voltage - 0.5 v < v cc1 < 6 v v rxd - 0.5 v cc1 + 0.5 v voltage at all inputs note: v in ? v cc1 is allowed v in - 0.5 + 6 v input current for all pins except ired anode pin i cc 10 ma output sink current 25 ma power dissipation see derating curve p d 250 mw junction temperature t j 125 c ambient temperature range (operating) t amb - 25 + 85 c storage temperature range t stg - 40 + 100 c soldering temperature see recommended solder profile 260 c average output current, pin 1 i ired (dc) 85 ma repetitive pulsed output current pin 1 to pin 2 t < 90 s, t on < 20 % i ired (rp) 430 ma esd protection v esd 1kv latchup | 100| ma eye safety information standard classification iec/en 60825-1 (2007-03), din en 60825-1 ( 2008-05) ?safety of laser products - part 1: equipment classification and requirements?, simplified method class 1 iec 62471 (2006), cie s009 (2002) ?photobiological safety of lamps and lamp systems? exempt directive 2006/25/ec of the european parliament and of the council of 5 th april 2006 on the minimum health and safety requirements regarding the ex posure of workers to risks arising from physical agents (artificial optical radiation) (19 th individual directive within the meaning of article 16(1) of directive 89/391/eec) exempt
tfbs4711 vishay semiconductors serial infrared transcei ver sir, 115.2 kbit/s, 2.4 v to 5.5 v operation www.vishay.com for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com document number: 82633 4 rev. 3.0, 19-nov-10 notes (1) tested at t amb = 25 c, v cc1 = v cc2 = 2.4 v to 5.5 v unless otherwise noted. typical values are for design aid only, not guaranteed nor subject to production testing. (2) sd mode becomes active when sd is set high for more than 0.2 s . in sd mode the detector is disabled and the output disconnecte d. electrical characteristics (1) parameter test conditions symbol min. typ. max. unit transceiver supply voltage v cc1 2.4 5.5 v operating temperature range t a - 25 + 85 c data rates 9.6 115.2 kbit/s idle supply current at v cc1 (receive mode, no signal) sd = low, t amb = - 25 c to + 85 c independent of ambient light, v cc1 = v cc2 = 2.4 v to 5.5 v i cc1 40 70 150 a sd = low, t amb = 25 c, v cc1 = v cc2 = 2.4 v to 5.5 v i cc1 40 70 100 a average dynamic supply current, transmitting i ired = 300 ma, 20 % duty cycle i cc1 0.6 2 ma standby (sd) (2) supply current sd = high, t amb = - 25 c to + 85 c, independent of ambient light i sd 0.01 1 a rxd to v cc1 impedance r rxd 400 500 600 k ? input voltage low (txd, sd) v ilo - 0.3 0.4 v input voltage high (sd) for compliance with i sd spec. v ihi v cc1 - 0.3 6 v input voltage high (txd) v ihi v cc1 - 0.5 6 v timing logic decision level 0.5 x v cc1 input leakage current low v ilo ? 0.3 v i ilo 0.01 10 a input leakage current high v ihi ? v cc1 - 0.3 v i ihi 0.01 10 a input capacitance (txd, sd) c in 5pf output voltage low, rxd c load = 8 pf, i olo ? |+ 500 a| v olo 0.4 v output voltage high, rxd i oh = - 200 a v ohi 0.8 x v cc1 v cc1 v optoelectronic characteristics (1) parameter test conditions symbol min. typ. max. unit receiver minimum irradiance e e in angular range (3) 9.6 kbit/s to 115.2 kbit/s ? = 850 nm to 900 nm, ? = 0, 15 e e 35 (3.5) 80 (8) mw/m 2 (w/cm 2 ) maximum irradiance e e in angular range (4) ? = 850 nm to 900 nm e e 5 (500) kw/m 2 (mw/cm 2 ) maximum no detection irradiance (2) ? = 850 nm to 900 nm, t r , t f < 40 ns, t po = 1.6 s at f = 115 khz, no output signal allowed e e 4 (0.4) mw/m 2 (w/cm 2 ) rise time of output signal 10 % to 90 %, c l = 8 pf t r(rxd) 10 30 80 ns fall time of output signal 90 % to 10 %, c l = 8 pf t f(rxd) 10 30 80 ns rxd pulse width of output signal input pulse length > 1.2 s t pw 1.7 2.2 3 s stochastic jitter, leading edge input irradiance = 100 mw/m 2 , ? 115.2 kbit/s 350 ns standby/shutdown delay, receiver startup time after shutdown active or power-on 500 s latency t l 50 150 s
tfbs4711 serial infrared transceiv er sir, 115.2 kbit/s, 2.4 v to 5.5 v operation vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 5 notes (1) t amb = 25 c, v cc = 2.4 v to 5.5 v unless otherwise noted. typical values are for design aid only, not guaranteed nor s ubject to production testing. (2) equivalent to irda background li ght and electromagnetic field test: fluorescent lighting immunity. (3) irda sensitivity definition: minimum irradiance e e in angular range, power per unit area. the rece iver must meet the ber specification while the source is operating at the minimum in tensity in angular range into the minimum half-angular range at t he maximum link lengt h. (4) maximum irradiance e e in angular range, power per unit area. the optical delive red to the detector by a source operating at the maximum intensity in angular range at minimum link length must not caus e receiver overdrive distortion and possible ralated link errors . if placed at the active output interface reference plane of the transmitter, the receiver must meet its bit error ratio (ber). for more definiti ons see the document ?symbols and terminology? on the vishay website. (5) using an external current limiting resistor is allowed and re commended to reduce ired intensity and operating current when curr ent reduction is intended to operate at the irda low power conditions. e.g. for v cc2 = 3.3 v a current limiting resistor of r s = 56 ? will allow a power minimized operation at irda low power conditions. (6) due to this wavelength restriction compared to the irda spec of 850 nm to 900 nm the transmitter is able to operate as source f or the standard remote control applications with codes as e.g. phillips rc5/rc6 ? or recs 80. recommended solder profiles solder profile for sn/pb soldering fig. 1 - recommended solder profile for sn/pb soldering lead (pb)-free, recomm ended solder profile the tfbs4711 is a lead (pb)-free transceiver and qualified for lead (pb)-free processing. for lead (pb)-free solder paste like sn (3.0 - 4.0) ag (0.5 - 0.9) cu, there are two standard reflow profiles: ramp-soak-spike (rss) and ramp-to-spike (rts). the ramp-soak-spike profile was developed primarily for reflow ovens heated by infrared radiation. with widespread use of forced convection reflow ovens the ramp-to-spike profile is used increasingly. shown in figure 2 is vishay?s recommended profiles for use with the tfbs4711 transceivers. for more details please refer to the application note ?smd assembly instructions?. wave soldering for tfduxxxx and tfbsxxxx transceiver devices wave soldering is not recommended. manual soldering manual soldering is the standard method for lab use. however, for a production process it cannot be recommended because the risk of damage is highly dependent on the experience of the operator. nevertheless, we added a chapter to the ab ove mentioned application note, describing manual soldering and desoldering. transmitter ired operating current limitation no external resistor for current limitation (5) i d 200 300 430 ma forward voltage of built-in ired i f = 300 ma v f 1.4 1.8 1.9 v output leakage ired current txd = 0 v, 0 < v cc1 < 5.5 v i ired - 1 0.01 1 a output radiant intensity v cc = 2.7 v, ? = 0, 15 txd = high, sd = low i e 25 65 370 mw/sr v cc1 = 5 v, ? = 0, 15, txd = low or sd = high (receiver is inactive as long as sd = high) i e 0.04 mw/sr output radiant intensity, angle of half intensity ? 24 deg peak-emission wavelength (6) ? p 880 900 nm spectral bandwidth ?? 45 nm optical rise time t ropt 10 50 300 ns optical fall time t fopt 10 50 300 ns optical output pulse duration input pulse width 1.6 < t txd < 23 s t opt t txd - 0.15 t txd + 0.15 s input pulse width t txd ? 23 s t opt 23 50 100 s optical overshoot 25 % optoelectronic characteristics (1) parameter test conditions symbol min. typ. max. unit 0 20 40 60 8 0 100 120 140 160 1 8 0 200 220 240 260 0 50 100 150 200 250 300 350 time (s) temperat u re (c) 2 c/s to 4 c/s 2 c/s to 4 c/s 10 s max. at 230 c 120 s to 1 8 0 s 160 c max. 240 c max. 90 s max. 19431
tfbs4711 vishay semiconductors serial infrared transcei ver sir, 115.2 kbit/s, 2.4 v to 5.5 v operation www.vishay.com for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com document number: 82633 6 rev. 3.0, 19-nov-10 storage the storage and drying processes for all vishay transceivers (tfduxxxx and tfbsxxx) are equivalent to msl4. the data for the drying procedure is given on labels on the packing and also in the application note ?taping, labeling, storage and packing?. fig. 2 - solder profile, rss recommendation recommended circuit diagram operated with a clean low impedance power supply the tfbs4711 needs no additional external components. however, depending on the entir e system design and board layout, additional components may be required (see figure 1). fig. 3 - recommended application circuit note *) r1 is optional when reduced intensity is used the capacitor c1 is buffering the supply voltage and eliminates the inductance of the power supply line. this one should be a tantalum or other fa st capacitor to guarantee the fast rise time of the ired current. the resistor r1 is the current limiting resistor, which may be used to reduce the operating current to levels below the specified controlled values for saving battery power. vishay?s transceivers integrat e a sensitive receiver and a built-in power driver. the combination of both needs a careful circuit board layout. t he use of thin, long, resistive and inductive wiring should be avoided. the shutdown input must be grounded for normal operation, also when the shutdown function is not used. the inputs (txd, sd) and the output rxd should be directly connected (dc - coupled) to t he i/o circuit. the capacitor c2 combined with the resistor r2 is the low pass filter for smoothing the supply voltage. r2, c1 and c2 are optional and dependent on the quality of the supply voltages v cc1 and injected noise. an unstable power supply with dropping voltage during transmision may reduce the sensitivity (and transmission range) of the transceiver. the placement of these parts is critical. it is strongly recommended to position c2 as close as possible to the transceiver pins. when extended wiring is used as in bench tests the inductance of the power supply can cause dynamically a voltage drop at v cc2 . often some power supplies are not able to follow the fast current rise time. in that case another 4.7 f (type, see table under c1) at v cc2 will be helpful. under extreme emi conditions as placing an rf-transmitter antenna on top of the transceiver, we recommend to protect all inputs by a low-pass filter, as a minimum a 12 pf capacitor, especially at the rxd port. the transceiver itself withstands emi at gsm frequencies above 500 v/m. when interference is observed, the wiring to the inputs picks it up. it is verifi ed by dpi measurements that as long as the interfering rf - voltage is below the logic threshold levels of the inputs and equivalent levels at the outputs no interferences are expected. one should keep in mind that basic rf - design rules for circuits design should be taken into account. especially longer signal lines should not be used without termination. see e.g. ?the art of electronics? paul horowitz, winfield hill, 1989, cambridge university press, isbn: 0521370957. 0 20 40 60 8 0 100 120 140 160 1 8 0 200 220 240 260 2 8 0 0 50 100 150 200 250 300 350 time (s) temperat u re (c) 20 s 2 c...4 c/s 2 c...4 c/s 90 s...120 s t 217 c for 50 s max t peak = 260 c max. 50 s max. t 255 c for 20 s max 19261 19295-2 v ired v cc g n d sd txd rxd v cc2 , ired a v cc1 gro u nd sd txd rxd r2 r1 *) c1 c2 table 1 - recommended application circuit components component recommended value vishay part number c1 4.7 f, 16 v 293d 475x9 016b c2 0.1 f, ceramic vj 1206 y 104 j xxmt r1 depends on current to be adjusted r2 47 ? , 0.125 w crcw-1206-47r0-f-rt1
tfbs4711 serial infrared transceiv er sir, 115.2 kbit/s, 2.4 v to 5.5 v operation vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 7 fig. 4 - typical a pplication circuit figure 4 shows an example of a typical application for to work with a separate supply voltage v s and using the transceiver with the ired anode connected to the unregulated battery v batt . this method reduces the peak load of the regulated power supply and saves therefore costs. alternatively all supplies can also be tied to only one voltage source. r1 and c1 are not used in this case and are depending on the circuit design in most cases not necessary. i/o and software in the description, already different i/os are mentioned. different combinations are tested and the function verified with the special drivers available from the i/o suppliers. in special cases refer to the i/o manual, the vishay application notes, or contact directly vishay sales, marketing or application. for operating at rs232 po rts the endecs toim4232 or toim5232 is recommended. note tfbs4711 echoes the txd signal at the rxd output during transmission. for communication th is signal is to be correctly ignored by the controller or the software. the echo signal is implemented for test purposes in mass production. current derating diagram figure 5 shows the maximum operating temperature when the device is operated without external current limiting resisor. fig. 5 - current derating diagram 19296-2 v b att 3 v to 3.6 v v s = 3.3 v v dd irtx irrx ir mode r2 c2 ired anode txd rxd sd g n d v cc1 50 55 60 65 70 75 80 85 90 2 2.5 3 3.5 4 4.5 5 5.5 6 operating voltage (v) at duty cycle 20 % ambient temperature (c) 18097
tfbs4711 vishay semiconductors serial infrared transcei ver sir, 115.2 kbit/s, 2.4 v to 5.5 v operation www.vishay.com for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com document number: 82633 8 rev. 3.0, 19-nov-10 package dimensions in millimeters fig. 6 - package drawing of tfbs4711, tolerance of height is + 0.1 mm, - 0.2 mm, other tolerances 0.2 mm fig. 7 - soldering footprints table 2 - truth table inputs outputs remark sd txd optical input irradiance mw/m 2 rxd transmitter operation high > 1 ms xx weakly pulled (500 ? ) to v cc1 0 shutdown low high x low (active) i e transmitting low high > 100 s x high inactive 0 protection is active low low < 4 high inactive 0 ignoring low signals below the irda defined threshold for noise immunity low low > min. detection threshold irradiance < max. detection th reshold irradiance low (active) 0 response to an irda compliant optical input signal low low > min. detection threshold irradiance undefined 0 overload conditions can cause unexpected outputs 19612 1972 8 emitter detector 5 x 0.95 = 4.75 0.95 0.64 12 3 4 5 6 0.4 1.27 recommended footprint side v ie w application 19301 emitter detector 5 x 0.95 = 4.75 0.95 0.64 123 45 6 0.6 1.27 recommended footprint top v ie w application
tfbs4711 serial infrared transceiv er sir, 115.2 kbit/s, 2.4 v to 5.5 v operation vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 9 reel dimensions in millimeters tape width (mm) a max. (mm) n (mm) w 1 min. (mm) w 2 max. (mm) w 3 min. (mm) w 3 max. (mm) 16 330 50 16.4 22.4 15.9 19.4 14017 dra w ing- n o.: 9. 8 00-5090.01-4 iss u e: 1; 29.11.05
tfbs4711 vishay semiconductors serial infrared transcei ver sir, 115.2 kbit/s, 2.4 v to 5.5 v operation www.vishay.com for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com document number: 82633 10 rev. 3.0, 19-nov-10 tape dimensions for tr in millimeters 19613
tfbs4711 serial infrared transceiv er sir, 115.2 kbit/s, 2.4 v to 5.5 v operation vishay semiconductors document number: 82633 for technical questions within your region, please contact one of the following: irdasupportam@vishay.com , irdasupportap@vishay.com , irdasupporteu@vishay.com www.vishay.com rev. 3.0, 19-nov-10 11 tape dimensions for tt in millimeters 20416
document number: 91 000 www.vishay.com revision: 11-mar-11 1 disclaimer legal disclaimer notice vishay all product, product specifications and data ar e subject to change without notice to improve reliability, function or design or otherwise. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectivel y, vishay), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained in any datasheet or in any o ther disclosure relating to any product. vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. to the maximum extent permitted by applicab le law, vishay disc laims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, incl uding without limitation specia l, consequential or incidental dama ges, and (iii) any and all impl ied warranties, including warran ties of fitness for particular purpose, non-infringement and merchantability. statements regarding the suitability of pro ducts for certain types of applications are based on vishays knowledge of typical requirements that are often placed on vishay products in gene ric applications. such statements are not binding statements about the suitability of products for a partic ular application. it is the customers responsibility to validate that a particu lar product with the properties described in th e product specification is su itable for use in a particul ar application. parameters provided in datasheets an d/or specifications may vary in different applications and perfo rmance may vary over time. all operating parameters, including typical pa rameters, must be validated for each customer application by the customers technical experts. product specifications do not expand or otherwise modify vishays term s and conditions of purchase, including but not limited to the warranty expressed therein. except as expressly indicated in writing, vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the vishay product co uld result in person al injury or death. customers using or selling vishay products not expressly indicated for use in such applications do so at their own risk and agr ee to fully indemnify and hold vishay and it s distributors harmless from and against an y and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that vis hay or its distributor was negligent regarding the design or manufact ure of the part. please contact authorized vishay personnel t o obtain written terms and conditions regarding products designed fo r such applications. no license, express or implied, by estoppel or otherwise, to any intelle ctual property rights is gran ted by this document or by any conduct of vishay. product names and markings noted herein may be trademarks of their respective owners.

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