{"id":8724,"date":"2026-06-30T05:19:58","date_gmt":"2026-06-30T05:19:58","guid":{"rendered":"https:\/\/materialparts.com\/sn65hvd74dr\/"},"modified":"2026-06-30T05:19:58","modified_gmt":"2026-06-30T05:19:58","slug":"sn65hvd74dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/sn65hvd74dr\/","title":{"rendered":"SN65HVD74DR"},"content":{"rendered":"

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

The SN65HVD74DR is a Texas Instruments 3.3 V full-duplex RS-485 transceiver with \u00b112 kV IEC ESD protection and 20 Mbps data rate. The device is fully enabled with no external enable pins, features 70 mV receiver hysteresis for noise immunity, and supports up to 256 nodes on the bus. It is packaged in an 8-pin SOIC and operates from -40\u00b0C to +125\u00b0C.<\/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
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n20 Mbps<\/td>\n<\/tr>\n
Duplex<\/td>\nFull-Duplex<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3.3 V<\/td>\n<\/tr>\n
ESD (IEC)<\/td>\n\u00b112 kV contact<\/td>\n<\/tr>\n
ESD (HBM)<\/td>\n>\u00b130 kV<\/td>\n<\/tr>\n
Common-Mode Range<\/td>\n-7 V to +12 V<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 20 Mbps full-duplex operation<\/li>\n
  • \u00b112 kV IEC 61000-4-2 ESD<\/li>\n
  • >\u00b130 kV HBM ESD protection<\/li>\n
  • No external enable pins required<\/li>\n
  • 70 mV receiver hysteresis<\/li>\n
  • 256 nodes on bus (1\/8 unit load)<\/li>\n
  • 5 V tolerant logic inputs<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial automation networks<\/li>\n
    • Building automation and HVAC<\/li>\n
    • Security and surveillance systems<\/li>\n
    • Encoder and decoder interfaces<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN65HVD74DR is a Texas Instruments 3.3 V full-duplex RS-485 transceiver with \u00b112 kV IEC ESD protection and 20 Mbps data rate. The device is fully enabled with no external enable pins, features 70 mV receiver hysteresis for noise immunity, and supports up to 256 nodes on the bus. It is packaged in […]<\/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":[138],"class_list":["post-8724","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"3.3V full-duplex RS-485 transceiver, 20Mbps, \u00b112kV IEC ESD, no enable pins, 8-SOIC","date_code":"","package_case":"8-Pin SOIC (4.9 x 3.9 x 1.27 mm)","in_stock":11450,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn65hvd7x.pdf","price":"$1.817 @ 1ku","product_introduction":"The SN65HVD74DR is a Texas Instruments 3.3 V full-duplex RS-485 transceiver optimized for 20 Mbps data rate with robust ESD protection. The \u00b112 kV IEC 61000-4-2 and >\u00b130 kV HBM ESD ratings protect against electrostatic discharge in harsh industrial environments. The device is fully enabled without external enable pins, simplifying design. A 70 mV receiver hysteresis provides excellent noise rejection on long bus cables. The 1\/8 unit load allows up to 256 nodes on a single bus. 5 V tolerant logic inputs are compatible with both 3.3 V and 5 V controllers. Packaged in an 8-pin SOIC rated for -40\u00b0C to +125\u00b0C.","working_principle":"The SN65HVD74 operates as a full-duplex RS-485 transceiver with independent driver and receiver paths. The driver converts single-ended TTL\/CMOS logic (DI input) into differential signals on the Y and Z bus outputs, while the receiver converts differential bus signals (A and B inputs) into single-ended logic (RO output). The driver and receiver are always enabled (no DE\/RE control pins), simplifying the design for full-duplex point-to-point applications. The 70 mV receiver hysteresis ensures reliable data reception in the presence of common-mode noise, while the wide common-mode range (-7 V to +12 V) supports long cable runs with ground potential differences.","pin_description":"
      Pin<\/th>Mnemonic<\/th>Description<\/th><\/tr>
      1<\/td>RO<\/td>Receiver output<\/td><\/tr>
      2<\/td>DI<\/td>Driver data input<\/td><\/tr>
      3<\/td>GND<\/td>Ground<\/td><\/tr>
      4<\/td>Y<\/td>Driver non-inverting output<\/td><\/tr>
      5<\/td>Z<\/td>Driver inverting output<\/td><\/tr>
      6<\/td>B<\/td>Receiver inverting input<\/td><\/tr>
      7<\/td>A<\/td>Receiver non-inverting input<\/td><\/tr>
      8<\/td>VCC<\/td>3.3V supply<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial fieldbus communication with \u00b112kV IEC ESD and 256-node support<\/li>\n
      • Building automation HVAC controllers with 70mV noise hysteresis<\/li>\n
      • Security and surveillance system multi-drop RS-485 networks<\/li>\n
      • Encoder\/decoder interfaces requiring full-duplex 20Mbps operation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        SN65HVD73DR<\/td>TI<\/td>With enable pins, 20 Mbps<\/td><\/tr>
        SN65HVD77DR<\/td>TI<\/td>50 Mbps, no enable pins<\/td><\/tr>
        THVD1550DR<\/td>TI<\/td>50 Mbps, with enables<\/td><\/tr>
        ADM3077E<\/td>ADI<\/td>Similar 3.3V full-duplex<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8724","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=8724"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8724\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8724"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8724"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}