{"id":3332,"date":"2026-06-01T01:58:22","date_gmt":"2026-06-01T01:58:22","guid":{"rendered":"https:\/\/materialparts.com\/st3485ecdr\/"},"modified":"2026-06-01T01:58:22","modified_gmt":"2026-06-01T01:58:22","slug":"st3485ecdr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/st3485ecdr\/","title":{"rendered":"ST3485ECDR"},"content":{"rendered":"

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

The ST3485ECDR from STMicroelectronics is a 3.3V powered, ESD protected RS-485\/RS-422 transceiver in SO-8. It guarantees 12Mbps data rate with half-duplex operation, industry-standard 75176 pinout, and supports up to 64 transceivers on the bus.<\/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\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n12 Mbps guaranteed<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3.0V to 3.6V (3.3V nominal)<\/td>\n<\/tr>\n
ESD Protection<\/td>\n+\/-15kV IEC 61000-4-2 air, +\/-8kV contact<\/td>\n<\/tr>\n
Common Mode Range<\/td>\n-7V to 12V<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n1uA max<\/td>\n<\/tr>\n
Supply Current<\/td>\n2.2mA max<\/td>\n<\/tr>\n
Drivers\/Receivers<\/td>\n1\/1 (half duplex)<\/td>\n<\/tr>\n
Bus Transceivers<\/td>\nUp to 64 on bus<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0 to 70 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSO-8 (SOT96-1)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 3.3V single supply, no charge pump<\/li>\n
  • +\/-15kV ESD protection on bus pins<\/li>\n
  • Interoperable with 5V logic<\/li>\n
  • 1uA shutdown mode<\/li>\n
  • 12Mbps guaranteed data rate<\/li>\n
  • -7V to 12V common mode range<\/li>\n
  • Industry standard 75176 pinout<\/li>\n
  • Current limiting and thermal shutdown<\/li>\n
  • Guaranteed high receiver output for floating inputs<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial RS-485\/RS-422 networks<\/li>\n
    • 3.3V UART to RS-485 conversion<\/li>\n
    • Half-duplex multidrop bus communication<\/li>\n
    • Building automation systems<\/li>\n
    • Meter reading and remote I\/O<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ST3485ECDR from STMicroelectronics is a 3.3V powered, ESD protected RS-485\/RS-422 transceiver in SO-8. It guarantees 12Mbps data rate with half-duplex operation, industry-standard 75176 pinout, and supports up to 64 transceivers on the bus. Key Specifications Data Rate 12 Mbps guaranteed Supply Voltage 3.0V to 3.6V (3.3V nominal) ESD Protection +\/-15kV IEC 61000-4-2 […]<\/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":[142],"class_list":["post-3332","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-st"],"acf":{"brief_explanation":"3.3V RS-485\/RS-422 transceiver, 12Mbps, 15kV ESD, half-duplex, SO-8","date_code":"","package_case":"SO-8 \/ SOT96-1 (4.9 x 3.9 x 1.75 mm)","in_stock":4532,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/st3485eb.pdf","price":"$0.71 @ 1ku","product_introduction":"The ST3485ECDR from STMicroelectronics is a 3.3V RS-485\/RS-422 transceiver with +\/-15kV ESD protection and 12Mbps data rate. Half-duplex with industry-standard 75176 pinout, supports up to 64 nodes on the bus. Features current limiting, thermal shutdown, and 1uA shutdown current. Commercial temperature range (0-70 C) in SO-8 package.","working_principle":"The driver converts single-ended TX data to differential signals on the A\/B bus lines. The receiver converts differential bus signals back to single-ended RX data. DE (driver enable) and RE (receiver enable) control half-duplex direction. When DE=low and RE=high, the device enters 1uA shutdown mode. The driver includes current limiting and thermal shutdown to protect against bus faults. High-impedance receiver output is guaranteed when inputs are floating.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>RO<\/td>Output<\/td>Receiver output<\/td><\/tr>
      2<\/td>RE<\/td>Input<\/td>Receiver enable (active low)<\/td><\/tr>
      3<\/td>DE<\/td>Input<\/td>Driver enable (active high)<\/td><\/tr>
      4<\/td>DI<\/td>Input<\/td>Driver data input<\/td><\/tr>
      5<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      6<\/td>A<\/td>I\/O<\/td>Non-inverting bus terminal<\/td><\/tr>
      7<\/td>B<\/td>I\/O<\/td>Inverting bus terminal<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>3.3V supply<\/td><\/tr><\/table>","application_scenarios":"
      • 3.3V MCU RS-485 communication interface<\/li>
      • Modbus RTU half-duplex multidrop network<\/li>
      • Building automation HVAC controllers<\/li>
      • Industrial meter reading and telemetry<\/li>
      • Half-duplex RS-422 backward-compatible links<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ST<\/td>ST3485EBDR<\/td>SO-8<\/td>Industrial temp -40 to 85 C<\/td><\/tr>
        ST<\/td>ST3485EIDT<\/td>SO-8<\/td>Extended -40 to 125 C<\/td><\/tr>
        TI<\/td>SN65HVD1176DR<\/td>SOIC-8<\/td>3.3V, 30Mbps, pin compatible<\/td><\/tr>
        MaxLinear<\/td>SP3485CN-L<\/td>SOIC-8<\/td>3.3V, 10Mbps, compatible<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3332","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=3332"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3332\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3332"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3332"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}