{"id":3339,"date":"2026-06-01T01:58:34","date_gmt":"2026-06-01T01:58:34","guid":{"rendered":"https:\/\/materialparts.com\/si8421ab-d-isr\/"},"modified":"2026-06-01T01:58:34","modified_gmt":"2026-06-01T01:58:34","slug":"si8421ab-d-isr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/si8421ab-d-isr\/","title":{"rendered":"SI8421AB-D-ISR"},"content":{"rendered":"

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

The SI8421AB-D-ISR from Skyworks Solutions (formerly Silicon Labs) is a 2-channel digital isolator with 1 forward and 1 reverse channel in SOIC-8 narrow body. It provides 2500Vrms isolation with capacitive coupling technology, supporting data rates up to 150Mbps with less than 10ns propagation delay.<\/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
Isolation Rating<\/td>\n2500 Vrms (1 minute)<\/td>\n<\/tr>\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\nDC to 150 Mbps<\/td>\n<\/tr>\n
\u0627\u0644\u0642\u0646\u0648\u0627\u062a<\/td>\n2 (1 forward, 1 reverse)<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n<10ns worst case<\/td>\n<\/tr>\n
\u062a\u0634\u0648\u064a\u0647 \u0639\u0631\u0636 \u0627\u0644\u0646\u0628\u0636<\/td>\n1.5ns typical<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2.7V to 5.5V<\/td>\n<\/tr>\n
Supply Current<\/td>\n<2.1mA per channel at 1Mbps<\/td>\n<\/tr>\n
CMTI<\/td>\n25kV\/us typical<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to 125 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-8 narrow body (3.9mm wide)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-low power: <2.1mA per channel at 1Mbps (5V)<\/li>\n
  • High speed: up to 150Mbps<\/li>\n
  • Precise timing: <10ns worst case propagation delay<\/li>\n
  • 1.5ns pulse width distortion, 0.5ns channel skew<\/li>\n
  • 2500Vrms isolation, 25kV\/us CMTI<\/li>\n
  • No start-up initialization required<\/li>\n
  • 2.7V to 5.5V supply range<\/li>\n
  • UL1577, CSA, VDE certified<\/li>\n
  • 60-year life at rated working voltage<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Isolated SPI and UART communication<\/li>\n
    • Industrial automation signal isolation<\/li>\n
    • Motor drive feedback isolation<\/li>\n
    • Isolated ADC\/DAC interfaces<\/li>\n
    • Power inverter control signal isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SI8421AB-D-ISR from Skyworks Solutions (formerly Silicon Labs) is a 2-channel digital isolator with 1 forward and 1 reverse channel in SOIC-8 narrow body. It provides 2500Vrms isolation with capacitive coupling technology, supporting data rates up to 150Mbps with less than 10ns propagation delay. Key Specifications Isolation Rating 2500 Vrms (1 minute) Data […]<\/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":[183],"class_list":["post-3339","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-skyworks"],"acf":{"brief_explanation":"2-ch digital isolator, 1F\/1R, 2500Vrms, 150Mbps, SOIC-8 narrow","date_code":"","package_case":"SOIC-8 Narrow Body (4.9 x 3.9 x 1.5 mm, 1.27mm pitch)","in_stock":2909,"datasheet":"https:\/\/www.skyworksinc.com\/en\/products\/isolation-devices\/si8421ab-d-isr","price":"$1.52 @ 1ku","product_introduction":"The SI8421AB-D-ISR from Skyworks (Silicon Labs) is a 2-channel digital isolator with 1 forward and 1 reverse channel, providing 2500Vrms isolation using capacitive coupling. Supports up to 150Mbps with ultra-low propagation delay (<10ns) and 1.5ns pulse width distortion. Ultra-low power consumption (<2.1mA\/ch at 1Mbps). Wide 2.7-5.5V supply. UL1577, CSA, and VDE certified. 25kV\/us CMTI.","working_principle":"Uses capacitive isolation with on-chip transformers fabricated in a CMOS process. Data is encoded and transmitted across the isolation barrier as high-frequency pulses via capacitors. The receiver decodes the pulses back to digital signals. A refresh mechanism continuously updates the output state. The bidirectional (1F\/1R) configuration enables isolated SPI or UART where one signal goes forward (e.g., MOSI\/TX) and one returns (e.g., MISO\/RX). No initialization is needed at startup.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDD1<\/td>Power<\/td>Side 1 supply (2.7-5.5V)<\/td><\/tr>
      2<\/td>INA<\/td>Input<\/td>Forward channel input<\/td><\/tr>
      3<\/td>OUTB<\/td>Output<\/td>Reverse channel output<\/td><\/tr>
      4<\/td>GND1<\/td>Ground<\/td>Side 1 ground<\/td><\/tr>
      5<\/td>GND2<\/td>Ground<\/td>Side 2 ground<\/td><\/tr>
      6<\/td>INB<\/td>Input<\/td>Reverse channel input<\/td><\/tr>
      7<\/td>OUTA<\/td>Output<\/td>Forward channel output<\/td><\/tr>
      8<\/td>VDD2<\/td>Power<\/td>Side 2 supply (2.7-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Isolated SPI communication to high-voltage ADC\/DAC<\/li>
      • Isolated UART between MCU and RS-485 transceiver<\/li>
      • Motor drive gate driver control signal isolation<\/li>
      • Industrial PLC I\/O module signal isolation<\/li>
      • Battery management system communication isolation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Skyworks<\/td>SI8420AB-D-ISR<\/td>SOIC-8<\/td>2 forward channels<\/td><\/tr>
        TI<\/td>ISO7221CDR<\/td>SOIC-8<\/td>150Mbps, 1F\/1R, 3.3\/5V<\/td><\/tr>
        ADI<\/td>ADuM1201CRZ<\/td>SOIC-8<\/td>25Mbps, 1F\/1R<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3339","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=3339"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3339\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3339"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3339"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}