{"id":5190,"date":"2026-06-09T10:12:33","date_gmt":"2026-06-09T10:12:33","guid":{"rendered":"https:\/\/materialparts.com\/thvd1520dr\/"},"modified":"2026-06-09T10:12:33","modified_gmt":"2026-06-09T10:12:33","slug":"thvd1520dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/thvd1520dr\/","title":{"rendered":"THVD1520DR"},"content":{"rendered":"

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

THVD1520DR from TI is a 3.3V\/5V RS-485 transceiver with +\/-16kV IEC ESD and true fail-safe. 500kbps for Modbus\/BACnet. 1\/4 unit load = 128 nodes. Fail-safe: open\/short\/idle bus = HIGH.<\/p>\n

\u0645\u0628\u062f\u0623 \u0627\u0644\u0639\u0645\u0644<\/h2>\n

Differential driver converts TX to A\/B bus signals. Receiver converts bus to RX. Fail-safe biases receiver threshold above 0V, so undriven bus = HIGH. DE\/RE control driver\/receiver enable.<\/p>\n

Pin Description<\/h2>\n\n\n\n\n\n\n\n\n\n
\u062f\u0628\u0648\u0633<\/th>\n\u0627\u0644\u0627\u0633\u0645<\/th>\n\u0627\u0644\u0648\u0638\u064a\u0641\u0629<\/th>\n<\/tr>\n
1<\/td>\nRO<\/td>\nReceiver output<\/td>\n<\/tr>\n
2<\/td>\n\u0625\u0639\u0627\u062f\u0629<\/td>\nRx enable (low)<\/td>\n<\/tr>\n
3<\/td>\nDE<\/td>\nDriver enable<\/td>\n<\/tr>\n
4<\/td>\nDI<\/td>\nDriver input<\/td>\n<\/tr>\n
6<\/td>\nA<\/td>\nNon-inverting bus<\/td>\n<\/tr>\n
7<\/td>\nB<\/td>\nInverting bus<\/td>\n<\/tr>\n
8<\/td>\nVCC<\/td>\n3.0-5.5V supply<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
    \n
  • Modbus RTU communication<\/li>\n
  • BACnet building automation<\/li>\n
  • HVAC control buses<\/li>\n<\/ul>\n

    Alternative Models<\/h2>\n\n\n\n\n
    \u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629<\/th>\n\u0631\u0642\u0645 \u0627\u0644\u062c\u0632\u0621<\/th>\n\u0627\u0644\u0645\u0644\u0627\u062d\u0638\u0627\u062a<\/th>\n<\/tr>\n
    TI<\/td>\nTHVD1550DR<\/td>\n50Mbps version<\/td>\n<\/tr>\n
    ADI<\/td>\nADM3077EARZ<\/td>\nLow-power RS-485<\/td>\n<\/tr>\n<\/table>","protected":false},"excerpt":{"rendered":"

    Product Overview THVD1520DR from TI is a 3.3V\/5V RS-485 transceiver with +\/-16kV IEC ESD and true fail-safe. 500kbps for Modbus\/BACnet. 1\/4 unit load = 128 nodes. Fail-safe: open\/short\/idle bus = HIGH. Working Principle Differential driver converts TX to A\/B bus signals. Receiver converts bus to RX. Fail-safe biases receiver threshold above 0V, so undriven bus […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[138],"class_list":["post-5190","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"RS-485 transceiver, 500kbps, +\/-16kV ESD, fail-safe, SOIC-8","date_code":"","package_case":"SOIC-8 (4.9 x 3.9 x 1.5mm, 1.27mm pitch)","in_stock":3535,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/thvd1520.pdf","price":"$0.65 @ 1ku","product_introduction":"THVD1520DR from TI is a 3.3V\/5V RS-485 transceiver with +\/-16kV IEC ESD and true fail-safe. 500kbps for Modbus\/BACnet. 1\/4 unit load = 128 nodes. Fail-safe: open\/short\/idle bus = HIGH.","working_principle":"Differential driver converts TX to A\/B bus signals. Receiver converts bus to RX. Fail-safe biases receiver threshold above 0V, so undriven bus = HIGH. DE\/RE control driver\/receiver enable.","pin_description":"
    Pin<\/th>Name<\/th>Function<\/th><\/tr>
    1<\/td>RO<\/td>Receiver output<\/td><\/tr>
    2<\/td>RE<\/td>Rx enable (low)<\/td><\/tr>
    3<\/td>DE<\/td>Driver enable<\/td><\/tr>
    4<\/td>DI<\/td>Driver input<\/td><\/tr>
    6<\/td>A<\/td>Non-inverting bus<\/td><\/tr>
    7<\/td>B<\/td>Inverting bus<\/td><\/tr>
    8<\/td>VCC<\/td>3.0-5.5V supply<\/td><\/tr><\/table>","application_scenarios":"
    • Modbus RTU communication<\/li>
    • BACnet building automation<\/li>
    • HVAC control buses<\/li><\/ul>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Notes<\/th><\/tr>
      TI<\/td>THVD1550DR<\/td>50Mbps version<\/td><\/tr>
      ADI<\/td>ADM3077EARZ<\/td>Low-power RS-485<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5190","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=5190"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5190\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5190"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5190"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}