{"id":2948,"date":"2026-05-28T15:08:13","date_gmt":"2026-05-28T15:08:13","guid":{"rendered":"https:\/\/materialparts.com\/max809strg\/"},"modified":"2026-05-28T15:08:13","modified_gmt":"2026-05-28T15:08:13","slug":"max809strg","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/max809strg\/","title":{"rendered":"MAX809STRG"},"content":{"rendered":"

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

The MAX809STRG from onsemi is a 3-pin microprocessor reset circuit in a SOT-23 package. It provides a push-pull active-low RESET output that monitors VCC supply voltages for 2.5V, 3.0V, 3.3V, and 5.0V systems. With a minimum power-on reset pulse width of 140ms and ultra-low supply current of 0.5 \u00b5A, this device ensures reliable processor initialization without external components.<\/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
\u0627\u0644\u0648\u0638\u064a\u0641\u0629<\/td>\nMicroprocessor Reset Monitor<\/td>\n<\/tr>\n
\u0646\u0648\u0639 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\nPush-Pull Active-Low RESET<\/td>\n<\/tr>\n
Reset Threshold<\/td>\n4.63V (S version, 5V system)<\/td>\n<\/tr>\n
Reset Timeout<\/td>\n140ms minimum<\/td>\n<\/tr>\n
Supply Current<\/td>\n0.5 \u00b5A typical at 3.2V<\/td>\n<\/tr>\n
Operating Voltage<\/td>\n1.0V to 5.5V<\/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
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-3<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Precision VCC monitoring for 2.5V, 3.0V, 3.3V, and 5.0V supplies<\/li>\n
  • 140ms minimum power-on reset pulse width<\/li>\n
  • RESET output guaranteed valid to VCC = 1.0V<\/li>\n
  • Ultra-low supply current (0.5 \u00b5A typical)<\/li>\n
  • VCC transient immunity<\/li>\n
  • No external components required<\/li>\n
  • SOT-23 and SC-70 package options<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Embedded systems and microcontroller supervision<\/li>\n
    • Battery-powered portable equipment<\/li>\n
    • Computers, servers, and workstations<\/li>\n
    • Critical microprocessor power supply monitoring<\/li>\n
    • Intelligent instruments and automotive systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX809STRG from onsemi is a 3-pin microprocessor reset circuit in a SOT-23 package. It provides a push-pull active-low RESET output that monitors VCC supply voltages for 2.5V, 3.0V, 3.3V, and 5.0V systems. With a minimum power-on reset pulse width of 140ms and ultra-low supply current of 0.5 \u00b5A, this device ensures reliable […]<\/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":[13,29],"tags":[],"chip_brand":[144],"class_list":["post-2948","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-on"],"acf":{"brief_explanation":"3-pin uP reset monitor, push-pull RESET, 4.63V threshold, SOT-23","date_code":"","package_case":"SOT-23-3","in_stock":3824,"datasheet":"https:\/\/www.onsemi.com\/pdf\/datasheet\/max809s-d.pdf","price":"$0.32 @ 1ku","product_introduction":"The MAX809STRG from onsemi is a cost-effective microprocessor supervisory circuit designed to monitor power supply voltages in digital systems. It asserts an active-low RESET output whenever VCC declines below a preset threshold, maintaining the reset for at least 140ms after VCC rises above the threshold. The S suffix indicates a 4.63V threshold suitable for 5V systems. With supply current as low as 0.5 \u00b5A and no external components required, this device is ideal for battery-powered and space-constrained applications.","working_principle":"The MAX809STRG uses an internal voltage reference and comparator to continuously monitor the VCC supply. When VCC falls below the reset threshold (4.63V for the S version), the RESET output is driven low. After VCC rises above the threshold, an internal timeout counter keeps RESET low for a minimum of 140ms to ensure the microprocessor has stabilized before beginning execution. The push-pull output stage provides active drive in both directions, eliminating the need for an external pullup resistor. The device is designed to ignore fast transients on VCC, preventing false reset triggering.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      2<\/td>RESET<\/td>Output<\/td>Active-low reset output (push-pull)<\/td><\/tr>
      3<\/td>VCC<\/td>Power<\/td>Supply voltage input (monitored)<\/td><\/tr><\/table>","application_scenarios":"
      • Embedded microcontroller systems requiring reliable power-on reset<\/li>
      • Battery-powered portable devices needing ultra-low quiescent current<\/li>
      • Computers, servers, and workstations for supply supervision<\/li>
      • Automotive ECUs and intelligent instrument monitoring<\/li>
      • Hot-plug applications requiring transient-immune reset protection<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Analog Devices<\/td>MAX809TEUR+T<\/td>SOT-23-3<\/td>Original Maxim version, 4.63V threshold<\/td><\/tr>
        onsemi<\/td>MAX810STRG<\/td>SOT-23-3<\/td>Active-high RESET variant<\/td><\/tr>
        onsemi<\/td>MAX809MTRG<\/td>SOT-23-3<\/td>4.38V threshold (M version)<\/td><\/tr>
        TI<\/td>TPS3823-33DBVR<\/td>SOT-23-5<\/td>3.3V watchdog reset, 5-pin<\/td><\/tr>
        Microchip<\/td>MCP130T-300I\/TT<\/td>SOT-23-3<\/td>3.0V reset, open-drain<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2948","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=2948"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2948\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2948"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2948"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}