vishay siliconix SI9241A document number: 70787 s11-0975-rev. f, 16-may-11 www.vishay.com 1 this document is subject to change without notice. the products described herein and this document ar e subject to specific disclaimers, set forth at www.vishay.com/doc?91000 single-ended bus transceiver features ? operating power supply range 6 v ? v bat ? 36 v ? reverse battery protection down to v bat ?? - 24 v ? standby mode with very low current consumption i bat(sb) = 1 a at v dd = 0.5 v ? low quiescent current in off condition i bat = 120 a and i dd ? 10 a ? iso 9141 compatible ? overtemperature shutdown function for k output ? defined k output off for open gnd ? defined receive output status for open k input ? defined k output off for tx input open ? open drain fault output ? 2 kv esd ? typical transmit speeds of 200 kbaud description the SI9241Aey is a monolithic bus transceiver designed to provide bidirectional serial communication in automotive diagnostic applications. the device incorporates protecti on against overvoltages and short circuits to v bat . the transceiver pin is protected and can be driven beyond the v bat voltage. the SI9241Aey is built on the vishay siliconix bic/dmos process. an epitaxial layer prevents latchup. the rx output is capable of driving cmos or 1 x lsttl load. the SI9241Aey is available in a space efficient 8-pin so package. it operates reliably over the automotive temperature range (- 40 to 125 c). the SI9241Aey is available in both standard and lead (pb)-free packages. pin configuration and functional block diagram - + v bat v dd gnd k rx cs tx fault v bat 2 v dd fault detector
www.vishay.com 2 document number: 70787 s11-0975-rev. f, 16-may-11 vishay siliconix SI9241A this document is subject to change without notice. the products described herein and this document ar e subject to specific disclaimers, set forth at www.vishay.com/doc?91000 output table and state diagrams stresses beyond those listed under ?absolute maximum ratings? ma y cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other condit ions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. a = 1 a = 0 over temp over temp . cs b = 1 b = 0 short circuit cs note: over temp is an internal condition, not meant to be a lo g ic si g nal. power on power on inputs state variable output table cs tx a b rx k fault comments 0011001 0111111 xx01khiz0over temp 0 x 1 0 k hiz 0 short circuit 1 x1 1001 receive mode 1x11111 x = "1" or "0" hiz = high impedance state absolute maximum ratings parameter limit unit voltages referenced to ground voltage on v bat - 24 to 45 v voltage k - 16 to (v bat + 1) voltage difference v (vbat, k) 55 voltage or max. current on any pin (except v bat , k) - 0.3 to (v dd + 0.3 v) or 10 ma voltage on v dd 7v k pin only, short circuit duration (to v bat or gnd) continuous operating temperature (t a ) - 40 to 125 c junction and storage temperature - 55 to 150 thermal impedance ( ? ja ) 125 c/w recommended operating range parameter limit unit voltages referenced to ground v dd 4.5 to 5.5 v v bat 6 to 36 k 6 to 36 digital inputs 0 to v dd
document number: 70787 s11-0975-rev. f, 16-may-11 www.vishay.com 3 vishay siliconix SI9241A this document is subject to change without notice. the products described herein and this document ar e subject to specific disclaimers, set forth at www.vishay.com/doc?91000 notes: a. room = 25 c, cold and hot = as det ermined by the operating temperature suffix. b. the algebraic convention whereby the most negative value is a minimum and the most pos itive a maximum, is used in this data sheet. c. typical values are for design aid only, not guaranteed nor subject to production testing. d. guaranteed by design, no t subject to production test. e. minimum pulse width to reset a fault condition. f. high referes to logic high and low refers to logic low. specifications parameter symbol test conditions unless specified v dd = 4.5 v to 5.5 v v bat = 6 v to 36 v limits - 40 to 125 c unit temp. a min. b typ. c max. b transmitter and logic levels cs , tx input low voltage v ilt full 1.5 v cs , tx input high voltage v iht full 3.5 tx input capacitance d c int full 10 pf cs , tx input pull-up resistance r tx , v dd = 5.5 v, tx or cs = 1.5 v, 3.5 v full 10 20 40 k ? k transmit k output low voltage v olk r l = 510 ? 5 %, v bat = 6 to 18 full 0.2 v bat v r l = 1 k ? 5 %, v bat = 16 to 36 full 0.2 v bat r l = 510 ? 5 %, v bat = 4.5 full 1.2 k output high voltage v ohk r l = 510 ? 5 %, v bat = 4.5 to 18 full 0.95 v bat r l = 1 k ? 5 %, v bat = 16 to 36 full 0.95 v bat k rise, fall times t r , tf see test circuit full 9.6 s k output sink resistance rsi cs = 0 v, tx = 0 v full 110 ? k output capacitance d c o full 20 pf receiver k input low voltage v ilk full 0.35 v bat v k input high voltage v ihk full 0.65 v bat k input hysteresis c, d v hys full 0.05 v bat k input currents i ihk cs = 4 v ihk = v bat full 20 a rx output low voltage v olr v ilk = 0.35 v bat i olr = 1 ma full 0.4 v rx pull-up resistance r rx full 5 20 k ? rx turn on delay t d(on) r l = 510 ? 5 %, v bat = 6 v to 18 v c l = 10 nf, see test circuit full 3 10 s r l = 1 k ? 5 %, v bat = 16 v to 36 v c l = 4.7 nf, see test circuit full 3 10 rx turn off delay t d(off) r l = 510 ? 5 %, v bat = 6 v to 18 v c l = 10 nf, see test circuit full 3 10 r l = 1 k ? 5 %, v bat = 16 v to 36 v c l = 4.7 nf, see test circuit full 3 10 supplies bat supply current on i bat(on) cs = tx = 0 v, v bat ? 16 v full 1.2 3 ma bat supply current off i bat(off) cs = high, v bat ? 12 v, tx = high f full 120 220 a bat supply current standby i bat(sb) v dd ? 0.5 v, v bat ? 12 v full < 1 10 logic supply current on i dd(on) v dd ? 5.5 v, tx = 0 v full 1.4 2.3 ma logic supply current off i dd(off) cs = high, v bat ? 12 v, tx = high f full 10 a miscellaneous tx transmit baud rate br t r l = 510 ? , c l = 10 nf full 10.4 kbaud rx receive baud rate c br r 6 v < v bat < 16 v, c rx = 20 pf full 200 transmission frequency f k-rxk 6 v < v bat < 16 v, r k = 510 ? , c k ? 1.3 nf full 50 200 khz fault output low voltage v olf cs = tx = 0, k = v bat , i olf = 1 ma full 0.4 v cs minimum pulse width d, e t cs full 1 s over temperature shutdown d t shut temperature rising 160 180 c temperature shutdown hysteresis c t hyst 30
www.vishay.com 4 document number: 70787 s11-0975-rev. f, 16-may-11 vishay siliconix SI9241A this document is subject to change without notice. the products described herein and this document ar e subject to specific disclaimers, set forth at www.vishay.com/doc?91000 pin configuration functional description the SI9241Aey can be either in transmit or receive mode and it contains over temperature, and short circuit v bat fault detection circuits. the voltage on k is internally compared to v bat/2 . if the voltage on the k pin is less than v bat/2 then rx output will be "low". if the voltage on the k pin is greater than v bat/2 then rx output will be "high". in order to be in transmit mode, cs must be set "low". when cs and tx are set "low" the internal mosfet will turn on, causing the k pin to be "low". in the transmit mode, the processor monitors rx and tx. when the two mirror each other there is no fault. in the event of over temperature, or short circuit to v bat , the SI9241Aey will turn off the k output to protect the ic and the exte rnal open drain fault pin will be asserted. the k pin will stay in high impedance and rx will follow the k pin. the fault will be reset when cs is toggled high. rx, cs and tx pins have an internal pull up resistor to v dd while the k pin has internal pull down resistors. when any one of the tx, v bat or gnd pins is open the k output is off. when cs is set "high" the si9241 aey is in receive mode and the internal mosfet for the k pin is turned off. the rx output will follow the k pin. if cs is "low" while the ic is receiving data, an incorrect fault signal will occur. to inhibit the short detect, tie cs and tx together. 1 2 3 4 5 6 7 8 top view narrow body tx v dd fault v bat k gnd so package cs rx ordering information part number temperature range SI9241Aey-t1 - 40 c to 125 c SI9241Aey-t1-e3 (lead (pb)-free) pin description pin number symbol description 1 v dd positive power supply 2 tx transmit, input 3cs chip select, input 4fault fault, open drain output 5 gnd ground connection 6 k transmit/receive, bidirectional 7 v bat battery power supply 8 rx receiver, output
document number: 70787 s11-0975-rev. f, 16-may-11 www.vishay.com 5 vishay siliconix SI9241A this document is subject to change without notice. the products described herein and this document ar e subject to specific disclaimers, set forth at www.vishay.com/doc?91000 test circuit and timing diagrams (transmit only) applications circuit vishay siliconix maintains worldwide manufacturing capability. pro ducts may be manufactured at on e of several qualified locatio ns. reliability data for silicon tech- nology and package reliability represent a composite of all qua lified locations. for related documents such as package/tape dra wings, part marking, and reliability data, see www.vishay.com/ppg?70787 . t d(off) v k v bat v dd gnd k tx SI9241Aey v bat r l c l cs 80 % 80 % 20 % 20 % t r t f - + v - + rx tx min t d(on) v bat r l = 510 , c l = 10 nf, v bat = 6 v to 18 v r l = 1 k , c l = 4.7 nf, v bat = 16 v to 36 v v dd v dd rx tx v b microcontroller ecu i/os ecu = electronic control unit k-line diagnostic tester 510 0.4 l-line bus v dd v bat c1 0.1 f c1 0.1 f 50 v v SI9241Aey - + - + v dd v dd v SI9241Aey - + - + v dd v dd
vishay siliconix package information document number: 71192 11-sep-06 www.vishay.com 1 dim millimeters inches min max min max a 1.35 1.75 0.053 0.069 a 1 0.10 0.20 0.004 0.008 b 0.35 0.51 0.014 0.020 c 0.19 0.25 0.0075 0.010 d 4.80 5.00 0.189 0.196 e 3.80 4.00 0.150 0.157 e 1.27 bsc 0.050 bsc h 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 l 0.50 0.93 0.020 0.037 q0808 s 0.44 0.64 0.018 0.026 ecn: c-06527-rev. i, 11-sep-06 dwg: 5498 4 3 1 2 5 6 8 7 h e h x 45 c all le a d s q 0.101 mm 0.004" l ba 1 a e d 0.25 mm (g a ge pl a ne) s oic (narrow): 8-lead jedec p a rt n u m b er: m s -012 s
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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