vishay siliconix si9243a document number: 70788 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 si9243aey 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 rx output is capable of driving cmos or 1 x lsttl load. the si9243aey is built on the vishay siliconix bic/dmos process. this process supports bipolar transistors, cmos, and dmos. an epitaxial layer prevents latchup. the si9243aey is available in a 8-pin so package and operates over the automotive temperature range (- 40 c to 125 c). the si9243aey is available in both standard and lead (pb)-free packages. pin configuration and functional block diagram tx rx l k l + - l + - k + - v bat /2 k logic and fault detect circuitry (see state diagram and truth table) v bat v dd gnd rx k v dd v dd v dd
www.vishay.com 2 document number: 70788 s11-0975-rev. f, 16-may-11 vishay siliconix si9243a 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 . tx b = 1 b = 0 short circuit tx power on power on note: over temp is an internal condition, not meant to be a logic signal. inputs state variable output table tx l a b k rx k rx l comments 0011000 1111111 0111001 1011110 xl01hizklover temp 0 l 1 0 hiz k l short circuit 1 1 1 1 1 1 1 receive mode 1011000 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, l - 16 to (v bat + 1) voltage difference v (vbat, k, l) 55 voltage on any pin (except v bat , k, l) or max. current - 0.3 v 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, l 6 to 36 digital inputs 0 to v dd
document number: 70788 s11-0975-rev. f, 16-may-11 www.vishay.com 3 vishay siliconix si9243a 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. 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 tx input low voltage v ilt full 1.5 v tx input high voltage v iht full 3.5 tx input capacitance d c int full 10 pf tx input pull-up resistance r tx v dd = 5.5 v, tx = 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 tx = 0 v full 110 ? k output capacitance d c o full 20 pf receiver l and k input high voltage v ih full 0.65 v bat v l and k input hysteresis c, d v hys full 0.05 v bat l and k input currents i ih tx = 4 v ih = v bat full 20 a rx l and rx k output low voltage v olr v ilk , v ill = 0.35 v bat i olr = 1 ma full 0.4 v rx l and rx k pull-up resistance r rx full 5 20 k ? rx k 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 k 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) tx = 0 v, v bat ? 16 v full 1.2 3 ma bat supply current off i bat(off) v iht ? v tx , v ihk ? v k , v ihl ? v l v bat ? 12 v 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) v iht ? v tx , v ihk ? v k , v ihl ? v l v bat ? 12 v full 10 a miscellaneous tx transmit baud rate br t r l = 510 ? , c l = 10 nf full 10.4 kbaud rx l and rx k 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 tx minimum pulse width d, e t tx 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: 70788 s11-0975-rev. f, 16-may-11 vishay siliconix si9243a 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 si9243aey can be either in transmit or receive mode and it contains over temperature, and short circuit v bat fault detection circuits. the voltage on the k and l pins are internally compared to v bat/2 . if the voltage on the k or l pin is less than v bat/2 then rx k or rx l output will be "low". if the voltage on the k or l pin is greater than v bat/2 then rx k or rx l output will be "high". in order to be in transmit mode, tx must be set "low". the tx signal is then internally inverted and turns the mosfet on, causing the k pin to be "low". in transmit mode, the processor monitors the rx k 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 si9243aey will turn off the k output to protect the ic. the k pin will stay in high impedance and rx k will follow the k pin. the fault will be reset when tx is toggled high. rx k , rx l and tx pins have internal pull up resistor to v dd while k and l pins have internal pull down resistors. when any one of the tx, v bat or gnd pins is open the k output is off. when the tx pin is set "high" the si9243aey is in receive mode and the internal mosfet is turned off. rx l and rx k outputs will follow l and k inputs respectively. 1 2 3 4 5 6 7 8 top view narrow body rx l rx k tx v bat k gnd so package v dd l ordering information part number temperature range SI9243AEY-T1 - 40 to 125 c SI9243AEY-T1-e3 (lead (pb)-free) pin description pin number symbol description 1 rx k k receiver, output 2 rx l l receiver, output 3 v dd positive power supply 4 tx transmit, input 5 gnd ground connection 6 k k transmit/receive, bidirectional 7 v bat battery power supply 8 l l transmit, input
document number: 70788 s11-0975-rev. f, 16-may-11 www.vishay.com 5 vishay siliconix si9243a 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. pr oducts may be manufactured at one of several qualified locatio ns. reliability data for silicon technology and package reliability represent a composite of all qualified locations. for related documents such as package/tape drawings, part marking, and reliability data, see www.vishay.com/ppg?70788 . t d(off) v k , v l v bat v dd gnd k tx si9243aey v bat r l c l 80 % 80 % 20 % 20 % t r t f - + v - + rx k 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 - + rx l rx k l tx v dd v dd v dd v b microcontroller ecu i/os ecu = electronic control unit l-line diagnostic tester 510 0.4 k-line bus v dd v bat c1 0.1 f c1 0.1 f 50 v si9243aey - + v - + - + v dd 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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