{"id":7467,"date":"2026-06-24T07:10:05","date_gmt":"2026-06-24T07:10:05","guid":{"rendered":"https:\/\/materialparts.com\/si9243aey-t1-e3\/"},"modified":"2026-06-24T07:10:05","modified_gmt":"2026-06-24T07:10:05","slug":"si9243aey-t1-e3","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/si9243aey-t1-e3\/","title":{"rendered":"SI9243AEY-T1-E3"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The SI9243AEY-T1-E3 from Vishay Siliconix is an ISO 9141-compatible single-ended bus transceiver for automotive diagnostic communication. Operating from 6V to 36V battery supply with reverse battery protection and 200kBaud data rate, it provides robust bidirectional serial communication in SOIC-8 package.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Supply Voltage (VBAT)<\/td>\n6V to 36V<\/td>\n<\/tr>\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n200 kBaud (typical)<\/td>\n<\/tr>\n
Reverse Battery Protection<\/td>\nDown to -24V<\/td>\n<\/tr>\n
Standby Current (IBAT)<\/td>\n1 \u03bcA @ VDD=0.5V<\/td>\n<\/tr>\n
Quiescent Current (OFF)<\/td>\n120 \u03bcA (IBAT)<\/td>\n<\/tr>\n
ESD Rating<\/td>\n2 kV<\/td>\n<\/tr>\n
Protocol<\/td>\nISO 9141<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-8<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • ISO 9141 compliant for automotive diagnostic bus communication<\/li>\n
  • Wide 6V to 36V battery supply operation with reverse protection to -24V<\/li>\n
  • Overtemperature shutdown function for K output protection<\/li>\n
  • Short circuit protection to VBAT on K and L pins<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Automotive OBD diagnostic interfaces<\/li>\n
    • Vehicle ECU communication modules<\/li>\n
    • ISO 9141\/K-Line protocol adapters<\/li>\n
    • Automotive service tool interfaces<\/li>\n
    • Industrial single-wire bus communication<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SI9243AEY-T1-E3 from Vishay Siliconix is an ISO 9141-compatible single-ended bus transceiver for automotive diagnostic communication. Operating from 6V to 36V battery supply with reverse battery protection and 200kBaud data rate, it provides robust bidirectional serial communication in SOIC-8 package. Key Specifications Supply Voltage (VBAT) 6V to 36V Data Rate 200 kBaud (typical) […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[136],"class_list":["post-7467","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-vishay"],"acf":{"brief_explanation":"ISO 9141 bus transceiver, 6-36V VBAT, 200kBaud, reverse protection, SOIC-8","date_code":"","package_case":"SOIC-8 (5 x 4 mm)","in_stock":5678,"datasheet":"https:\/\/www.vishay.com\/docs\/70788\/si9243a.pdf","price":".20 @ 1ku","product_introduction":"The SI9243AEY-T1-E3 from Vishay Siliconix is a monolithic single-ended bus transceiver designed for bidirectional serial communication in automotive diagnostic applications compliant with the ISO 9141 standard. Operating from a 6V to 36V battery supply, it provides the physical layer interface between a microcontroller UART and the single-wire K\/L diagnostic bus. The device features comprehensive protection including reverse battery protection down to -24V, overtemperature shutdown, short-circuit protection to VBAT, and defined output states for fault conditions. With typical transmit speeds of 200kBaud and ultra-low 1\u03bcA standby current, it is well-suited for automotive ECU diagnostic ports and service tool interfaces.","working_principle":"The SI9243AEY operates as a bidirectional single-ended bus transceiver. (1) In transmit mode (TX low), the internal MOSFET pulls the K line low, with the TX signal inverted and driven onto the bus. The processor monitors RXK and TX to verify correct bus operation, detecting faults when they do not mirror each other. (2) In receive mode, the K and L pin voltages are internally compared to VBAT\/2. If the bus voltage is below VBAT\/2, RXK\/RXL output low; if above, they output high. (3) Protection circuits include overtemperature shutdown that disables the K output when the die temperature exceeds the threshold, and short-circuit detection that disables the K output and sets the fault flag when VBAT short is detected. (4) The fault output (open-drain) provides an interrupt to the microcontroller when overtemperature or short-circuit conditions occur.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>TX<\/td>Transmit data input (active low)<\/td><\/tr>
      2<\/td>RXL<\/td>Receive L line data output<\/td><\/tr>
      3<\/td>RXK<\/td>Receive K line data output<\/td><\/tr>
      4<\/td>VBAT<\/td>Battery supply (6-36V)<\/td><\/tr>
      5<\/td>L<\/td>L line bus connection<\/td><\/tr>
      6<\/td>K<\/td>K line bus connection<\/td><\/tr>
      7<\/td>GND<\/td>Ground<\/td><\/tr>
      8<\/td>VDD<\/td>Logic supply (5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive OBD-II diagnostic connector K-line interface<\/li>
      • Vehicle ECU diagnostic communication ports per ISO 9141<\/li>
      • Automotive service tool K\/L-line adapters<\/li>
      • ISO 9141 protocol converters and gateway modules<\/li>
      • Industrial single-wire bus communication with high-voltage protection<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        SI9243AEY<\/td>Vishay<\/td>Standard (non-lead-free) version<\/td><\/tr>
        L9637D<\/td>STMicroelectronics<\/td>ISO 9141 transceiver, SOIC-8<\/td><\/tr>
        MC33290<\/td>NXP<\/td>ISO K-line transceiver, SOIC-8<\/td><\/tr>
        TJA1021T<\/td>NXP<\/td>LIN transceiver (different protocol)<\/td><\/tr>
        SN65HVDA100<\/td>TI<\/td>ISO 9141 transceiver<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7467","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=7467"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7467\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7467"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7467"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}