{"id":11225,"date":"2026-07-26T02:22:31","date_gmt":"2026-07-26T02:22:31","guid":{"rendered":"https:\/\/ic-vendor.com\/sn65hvd34dr\/"},"modified":"2026-07-26T02:22:31","modified_gmt":"2026-07-26T02:22:31","slug":"sn65hvd34dr","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/sn65hvd34dr\/","title":{"rendered":"SN65HVD34DR"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The Texas Instruments SN65HVD34DR is a 3.3V full-duplex RS-485 transceiver with independent driver and receiver enables. Signaling rate up to 5Mbps, 256 nodes, -9V to 14V fault protection, and 15kV HBM ESD in a 14-pin SOIC package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Transceivers<\/td>\n1 Driver \/ 1 Receiver<\/td>\n<\/tr>\n
Duplex<\/td>\nFull<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n3.0V to 3.6V (nom. 3.3V)<\/td>\n<\/tr>\n
Signaling Rate<\/td>\n5 Mbps<\/td>\n<\/tr>\n
Fault Protection<\/td>\n-9V to +14V<\/td>\n<\/tr>\n
Common-Mode Range<\/td>\n-7V to +12V<\/td>\n<\/tr>\n
Nodes<\/td>\n256 (1\/8 unit load)<\/td>\n<\/tr>\n
ESD (HBM)<\/td>\n>15 kV on bus pins<\/td>\n<\/tr>\n
Standby Current<\/td>\n<1 uA<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-14 (8.65×6.0mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Full-duplex with independent DE\/RE enables<\/li>\n
  • 1\/8 unit load (256 nodes on bus)<\/li>\n
  • Bus-pin ESD >15kV HBM<\/li>\n
  • Fail-safe for idle, open, and shorted bus<\/li>\n
  • Hot-plug fault-free power-up\/down<\/li>\n
  • Driver current limit and thermal shutdown<\/li>\n
  • 5V tolerant inputs<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial RS-485\/RS-422 network nodes<\/li>\n
    • Process automation and PLC communication<\/li>\n
    • Building HVAC control bus<\/li>\n
    • Instrumentation and measurement systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The Texas Instruments SN65HVD34DR is a 3.3V full-duplex RS-485 transceiver with independent driver and receiver enables. Signaling rate up to 5Mbps, 256 nodes, -9V to 14V fault protection, and 15kV HBM ESD in a 14-pin SOIC package. Key Specifications Transceivers 1 Driver \/ 1 Receiver Duplex Full Supply Voltage 3.0V to 3.6V (nom. […]<\/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":[19,13],"tags":[2498],"chip_brand":[138],"class_list":["post-11225","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","tag-sn65hvd34dr","chip_brand-ti"],"acf":{"brief_explanation":"3.3V full-duplex RS-485 transceiver, 5Mbps, 256 nodes, 15kV ESD, SOIC-14","date_code":"","package_case":"SOIC-14 (8.65x6.0mm)","in_stock":8900,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn65hvd34.pdf","price":".08 @ 1ku","product_introduction":"The SN65HVD34DR from Texas Instruments is a 3.3V full-duplex RS-485 transceiver with 5Mbps signaling rate in a 14-pin SOIC package. The device features independent active-high driver enable (DE) and active-low receiver enable (RE) for full-duplex communication. As a 1\/8 unit load device, it supports up to 256 nodes on a single RS-485 bus. Built-in fault protection covers -9V to +14V on bus pins with >15kV HBM ESD rating. Fail-safe receiver ensures known output state for idle, open, or shorted bus conditions. Hot-plug capable with <1uA standby current.","working_principle":"The SN65HVD34 uses a differential driver output stage that converts single-ended TTL\/CMOS logic levels to RS-485 differential signals (A\/B pair). The differential receiver converts the bus differential voltage back to single-ended logic. When both DE and RE are disabled, the device enters <1uA standby mode. The driver includes output current limiting (250mA per RS-485 spec) and thermal shutdown for bus contention protection. The receiver incorporates a fail-safe bias network that forces the output high when the differential input voltage is between -200mV and +200mV (idle, open, or shorted bus). Hot-plug circuitry ensures glitch-free output during power-up and power-down transients.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>RE<\/td>Input<\/td>Receiver enable (active low)<\/td><\/tr>
      2<\/td>DE<\/td>Input<\/td>Driver enable (active high)<\/td><\/tr>
      3<\/td>D<\/td>Input<\/td>Driver data input<\/td><\/tr>
      4<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      5-8<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      9<\/td>A<\/td>I\/O<\/td>Bus non-inverting I\/O<\/td><\/tr>
      10<\/td>B<\/td>I\/O<\/td>Bus inverting I\/O<\/td><\/tr>
      11-12<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      13<\/td>R<\/td>Output<\/td>Receiver data output<\/td><\/tr>
      14<\/td>VCC<\/td>Power<\/td>3.3V supply<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial Modbus RTU RS-485 network<\/li>
      • Building automation BACnet MS\/TP bus<\/li>
      • Process control PROFIBUS-DP node<\/li>
      • Laboratory instrument GPIB-like interface<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        SN65HVD33DR<\/td>TI<\/td>25Mbps higher speed variant<\/td><\/tr>
        THVD1450DR<\/td>TI<\/td>5V supply, wider temp range<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/11225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=11225"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/11225\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=11225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=11225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=11225"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=11225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}