{"id":2734,"date":"2026-05-25T02:05:51","date_gmt":"2026-05-25T02:05:51","guid":{"rendered":"https:\/\/materialparts.com\/iso7421dr\/"},"modified":"2026-05-25T02:05:51","modified_gmt":"2026-05-25T02:05:51","slug":"iso7421dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/iso7421dr\/","title":{"rendered":"ISO7421DR"},"content":{"rendered":"

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

The ISO7421DR from Texas Instruments is a dual-channel 1\/1 digital isolator in an 8-SOIC package. Using capacitive SiO2 isolation, it provides 2500Vrms galvanic isolation with 1Mbps data rate and 9ns typical propagation delay for industrial communication interfaces.<\/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
\u0627\u0644\u0642\u0646\u0648\u0627\u062a<\/td>\n2 (1 forward \/ 1 reverse)<\/td>\n<\/tr>\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n1Mbps<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0639\u0632\u0644<\/td>\n2500Vrms (1 min, UL1577)<\/td>\n<\/tr>\n
CMTI<\/td>\n25kV\/us minimum<\/td>\n<\/tr>\n
\u062a\u0623\u062e\u064a\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631<\/td>\n9ns typical, 14ns max<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3.3V \/ 5V (both sides)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n8-SOIC (narrow body)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40\u00b0C to +105\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Dual-channel with 1 forward \/ 1 reverse configuration<\/li>\n
  • 2500Vrms isolation per UL1577<\/li>\n
  • 4242Vpk transient isolation per VDE 0884-10<\/li>\n
  • Capacitive SiO2 isolation barrier<\/li>\n
  • 3.3V to 5V level translation between sides<\/li>\n
  • Low 1.5mA per channel current consumption<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial RS-485\/RS-232 interface isolation<\/li>\n
    • SPI \/ I2C communication isolation<\/li>\n

Motor drive signal isolation<\/td>\n<\/tr>\n
Medical equipment isolation barriers<\/td>\nPower supply feedback loop isolation<\/td>\n<\/tr>\n<\/table><\/ul>","protected":false},"excerpt":{"rendered":"

Product Overview The ISO7421DR from Texas Instruments is a dual-channel 1\/1 digital isolator in an 8-SOIC package. Using capacitive SiO2 isolation, it provides 2500Vrms galvanic isolation with 1Mbps data rate and 9ns typical propagation delay for industrial communication interfaces. Key Specifications Channels 2 (1 forward \/ 1 reverse) Data Rate 1Mbps Isolation Voltage 2500Vrms (1 […]<\/p>\n","protected":false},"author":2,"featured_media":2763,"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-2734","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual 1\/1 digital isolator, 2500Vrms, 1Mbps, 9ns prop delay, 8-SOIC","date_code":"","package_case":"8-SOIC (4.90 x 6.00 x 1.50 mm)","in_stock":10233,"datasheet":"https:\/\/www.ti.com\/product\/ISO7421","price":"$3.60 @ 1ku","product_introduction":"The ISO7421DR from Texas Instruments is a dual-channel digital isolator with one forward and one reverse channel in a narrow-body 8-SOIC package. Using capacitive coupling through a silicon dioxide (SiO2) insulation barrier, it provides 2500Vrms galvanic isolation for one minute per UL1577 and 4242Vpk per VDE 0884-10. The device supports data rates up to 1Mbps with 9ns typical propagation delay. It operates from 3.3V or 5V supplies on either side, enabling level translation across the isolation barrier. Typical current consumption is 1.5mA per channel at 3.3V.","working_principle":"The ISO7421DR uses capacitive coupling through an SiO2 insulation barrier to transmit digital signals across the isolation boundary. Each channel consists of a logic input buffer, a high-voltage capacitive coupling element, and a logic output buffer. The input signal modulates a carrier that passes through the isolation capacitor and is demodulated on the output side. The reverse channel operates identically in the opposite direction. The SiO2 barrier provides galvanic isolation while maintaining signal integrity with low propagation delay (9ns typical) and low skew (300ps typical). Common-mode transients are rejected by the differential capacitive coupling structure.","pin_description":"
Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
1<\/td>VCC1<\/td>Power<\/td>Side 1 supply (3.3V or 5V)<\/td><\/tr>
2<\/td>OUT1<\/td>Output<\/td>Forward channel output (Side 2)<\/td><\/tr>
3<\/td>IN1<\/td>Input<\/td>Forward channel input (Side 1)<\/td><\/tr>
4<\/td>GND1<\/td>Power<\/td>Side 1 ground<\/td><\/tr>
5<\/td>GND2<\/td>Power<\/td>Side 2 ground<\/td><\/tr>
6<\/td>IN2<\/td>Input<\/td>Reverse channel input (Side 2)<\/td><\/tr>
7<\/td>OUT2<\/td>Output<\/td>Reverse channel output (Side 1)<\/td><\/tr>
8<\/td>VCC2<\/td>Power<\/td>Side 2 supply (3.3V or 5V)<\/td><\/tr><\/table>","application_scenarios":"
  • RS-485\/RS-232 communication isolation barrier<\/li>
  • SPI and I2C bus isolation in industrial systems<\/li>
  • Motor drive gate driver signal isolation<\/li>
  • Medical equipment patient-side isolation<\/li>
  • Isolated power supply feedback loops<\/li><\/ul>","alternative_models":"
    Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
    TI<\/td>ISO6421DR<\/td>8-SOIC<\/td>150Mbps upgrade, pin-compatible<\/td><\/tr>
    TI<\/td>ISO7420DR<\/td>8-SOIC<\/td>2 forward channels variant<\/td><\/tr>
    ADI<\/td>ADuM1201ARZ<\/td>8-SOIC<\/td>Dual 1\/1, 25Mbps, compatible<\/td><\/tr>
    Silicon Labs<\/td>Si8621BC-B-IS<\/td>8-SOIC<\/td>Dual 1\/1, 150Mbps, compatible<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2734","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=2734"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2734\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media\/2763"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2734"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2734"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}