{"id":7075,"date":"2026-06-23T03:22:37","date_gmt":"2026-06-23T03:22:37","guid":{"rendered":"https:\/\/materialparts.com\/thvd1419dt\/"},"modified":"2026-06-23T03:22:37","modified_gmt":"2026-06-23T03:22:37","slug":"thvd1419dt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/thvd1419dt\/","title":{"rendered":"THVD1419DT"},"content":{"rendered":"

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

The THVD1419DT from Texas Instruments is a 3.3V to 5V half-duplex RS-485 transceiver with integrated surge protection. By embedding TVS diodes in the standard 8-pin SOIC package, it provides IEC 61000-4-5 2.5kV surge protection without external components, making it ideal for robust industrial and building automation communication links.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n3 V to 5.5 V<\/td>\n<\/tr>\n
Signaling Rate<\/td>\n250 kbps<\/td>\n<\/tr>\n
Duplex<\/td>\nHalf<\/td>\n<\/tr>\n
ESD Protection (IEC Contact)<\/td>\n+\/-8 kV<\/td>\n<\/tr>\n
Surge Protection (IEC 61000-4-5)<\/td>\n+\/-2.5 kV<\/td>\n<\/tr>\n
Common-Mode Range<\/td>\n+\/-12 V<\/td>\n<\/tr>\n
Receiver Hysteresis<\/td>\n30 mV<\/td>\n<\/tr>\n
Standby Current<\/td>\n< 2 uA<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +125C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Integrated TVS diodes provide IEC surge protection without external components<\/li>\n
  • +\/-8kV IEC 61000-4-2 contact discharge ESD protection<\/li>\n
  • +\/-2.5kV IEC 61000-4-5 surge protection for cable transients<\/li>\n
  • +\/-30kV IEC air-gap discharge protection<\/li>\n
  • Wide +\/-12V common-mode range for long cable runs<\/li>\n
  • Glitch-free power-up\/down for hot-plug capability<\/li>\n
  • Open, short, and idle bus failsafe receiver<\/li>\n
  • 1\/8 unit load supports up to 256 bus nodes<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Building automation and HVAC RS-485 networks<\/li>\n
    • Industrial factory automation and control<\/li>\n
    • Smart meters and grid infrastructure<\/li>\n
    • Video surveillance communication links<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The THVD1419DT from Texas Instruments is a 3.3V to 5V half-duplex RS-485 transceiver with integrated surge protection. By embedding TVS diodes in the standard 8-pin SOIC package, it provides IEC 61000-4-5 2.5kV surge protection without external components, making it ideal for robust industrial and building automation communication links. Key Specifications Supply Voltage 3 […]<\/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-7075","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"RS-485 transceiver, 250kbps, integrated surge protection, +\/-2.5kV, 3-5.5V, SOIC-8, -40 to +125C","date_code":"","package_case":"SOIC-8 (4.90 x 3.91 x 1.58 mm)","in_stock":5200,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/thvd1419.pdf","price":"$1.75 @ 1ku","product_introduction":"The THVD1419DT from Texas Instruments is a 3.3V to 5V half-duplex RS-485 transceiver with integrated surge protection in a standard SOIC-8 package. The integrated TVS diodes provide IEC 61000-4-5 +\/-2.5kV surge protection and IEC 61000-4-2 +\/-8kV contact discharge ESD protection, eliminating the need for external protection components and reducing board space. The device supports data rates up to 250 kbps with a wide +\/-12V common-mode range suitable for long cable runs. Features include 30 mV receiver hysteresis for noise rejection, glitch-free power-up\/down for hot-plug capability, open\/short\/idle bus failsafe, and 1\/8 unit load supporting up to 256 nodes on the bus. Standby current is below 2 uA.","working_principle":"The THVD1419DT integrates an RS-485 transceiver with TVS surge protection diodes. (1) Transmitter: The driver converts single-ended TTL\/CMOS logic levels (D input) to differential RS-485 signals (A and B bus outputs) compliant with TIA\/EIA-485A. The driver output is enabled by the DE (driver enable) pin. When disabled, the driver outputs are high-impedance. (2) Receiver: The receiver converts differential RS-485 bus signals (A and B) to single-ended logic levels (R output). The receiver is enabled when RE is low and disabled (high-impedance R output) when RE is high. With 30 mV hysteresis, the receiver rejects noise on the bus. (3) Failsafe: Open, short, and idle bus conditions bias the receiver output to a known high state, preventing erroneous data. (4) Surge Protection: Integrated bidirectional TVS diodes on the A and B bus pins clamp voltage transients from cable-coupled surge events, providing IEC 61000-4-5 +\/-2.5kV protection without external components.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>R<\/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>D<\/td>Input<\/td>Driver data input<\/td><\/tr>
      5<\/td>GND<\/td>Ground<\/td>Ground reference<\/td><\/tr>
      6<\/td>A<\/td>I\/O<\/td>Non-inverting bus I\/O<\/td><\/tr>
      7<\/td>B<\/td>I\/O<\/td>Inverting bus I\/O<\/td><\/tr>
      8<\/td>VCC<\/td>Power<\/td>Supply voltage (3-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Building automation and HVAC RS-485 networks with integrated surge protection<\/li>
      • Industrial factory automation and control with hot-plug capability<\/li>
      • Smart meters and grid infrastructure with robust cable transient immunity<\/li>
      • Video surveillance communication links with IEC 61000-4-5 surge rating<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>THVD1429DT<\/td>SOIC-8<\/td>20 Mbps version with surge<\/td><\/tr>
        TI<\/td>SN65HVD75DR<\/td>SOIC-8<\/td>3.3V, 20Mbps, no surge<\/td><\/tr>
        Analog Devices<\/td>ADM3485EARZ<\/td>SOIC-8<\/td>3.3V, 12Mbps<\/td><\/tr>
        Maxim<\/td>MAX3485ECSA+<\/td>SOIC-8<\/td>3.3V, 10Mbps<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7075","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=7075"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7075\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7075"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7075"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}