{"id":7547,"date":"2026-06-26T04:27:09","date_gmt":"2026-06-26T04:27:09","guid":{"rendered":"https:\/\/materialparts.com\/tps3813j25dbvr\/"},"modified":"2026-06-26T04:27:09","modified_gmt":"2026-06-26T04:27:09","slug":"tps3813j25dbvr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps3813j25dbvr\/","title":{"rendered":"TPS3813J25DBVR"},"content":{"rendered":"

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

The TPS3813J25DBVR from Texas Instruments is a processor supervisory circuit with window watchdog timer and 2.25V voltage monitoring threshold in SOT-23-6 package for safety-critical systems.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Threshold Voltage (VIT)<\/td>\n2.25 V (monitors 2.5V rail)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2V to 6V<\/td>\n<\/tr>\n
Supply Current<\/td>\n9 uA typical<\/td>\n<\/tr>\n
Reset Delay<\/td>\n25 ms fixed<\/td>\n<\/tr>\n
Watchdog Type<\/td>\nWindow watchdog (programmable)<\/td>\n<\/tr>\n
Watchdog Timeout<\/td>\n0.25s to 2.5s<\/td>\n<\/tr>\n
Reset Output<\/td>\nOpen-drain, active-low<\/td>\n<\/tr>\n
Threshold Accuracy<\/td>\n+\/-2.4%<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-6 (DBV suffix)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 2.25V threshold for 2.5V supply rail monitoring<\/li>\n
  • Window watchdog with programmable time window and ratio<\/li>\n
  • 9uA ultra-low supply current<\/li>\n
  • 25ms fixed power-on reset delay<\/li>\n
  • Open-drain reset output for wired-OR configuration<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 2.5V rail processor supervision<\/li>\n
    • Safety-critical DSP and MCU monitoring<\/li>\n
    • Industrial controller watchdog<\/li>\n
    • Automotive 2.5V logic rail monitoring<\/li>\n
    • Electricity meter supervisory circuit<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TPS3813J25DBVR from Texas Instruments is a processor supervisory circuit with window watchdog timer and 2.25V voltage monitoring threshold in SOT-23-6 package for safety-critical systems. Key Specifications Threshold Voltage (VIT) 2.25 V (monitors 2.5V rail) Supply Voltage 2V to 6V Supply Current 9 uA typical Reset Delay 25 ms fixed Watchdog Type Window […]<\/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":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-7547","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"Window watchdog supervisor, 2.25V threshold, SOT-23-6","date_code":"","package_case":"SOT-23-6 (2.9 x 2.8 x 1.45 mm)","in_stock":7650,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps3813.pdf","price":"$0.76 @ 1ku","product_introduction":"The TPS3813J25DBVR from Texas Instruments is a processor supervisory circuit with a window watchdog timer designed for safety-critical systems. The device monitors a 2.5V supply rail with a 2.25V threshold and provides an open-drain active-low reset output. The window watchdog requires the supervised processor to trigger the WDI pin within a programmable time window, with both upper and lower limits configurable via WDT and WDR pins. The J25 suffix indicates 2.25V threshold for 2.5V rail monitoring. The 9uA supply current and SOT-23-6 package make it suitable for space-constrained and battery-powered applications.","working_principle":"The TPS3813J25DBVR operates as a voltage supervisor with window watchdog for 2.5V rail monitoring. (1) The voltage supervisor monitors VDD through an internal resistor divider compared with a precision bandgap reference. When VDD drops below the 2.25V threshold, the open-drain RESET output asserts low. After VDD recovers above the threshold, a 25ms fixed delay ensures proper system reset before RESET de-asserts. (2) The window watchdog provides two-level time supervision: the processor must trigger WDI within an upper time limit (set by WDT pin: 0.25s, 1s, or 2.5s) and after a minimum lower limit (set by WDR pin). Early or late triggers cause a reset, providing stronger supervision than a simple timeout watchdog. (3) The 9uA supply current allows use in always-on battery systems. The open-drain output supports wired-OR connection with other supervisor outputs.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>WDT<\/td>Watchdog timeout programming<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td><\/tr>
      3<\/td>WDR<\/td>Watchdog window ratio setting<\/td><\/tr>
      4<\/td>RESET<\/td>Reset output (open drain, active low)<\/td><\/tr>
      5<\/td>WDI<\/td>Watchdog input (falling edge trigger)<\/td><\/tr>
      6<\/td>VDD<\/td>Supply and sense voltage (2-6V)<\/td><\/tr><\/table>","application_scenarios":"
      • 2.5V rail processor supervision with window watchdog<\/li>
      • Safety-critical DSP and MCU monitoring for SIL systems<\/li>
      • Industrial controller watchdog with programmable window<\/li>
      • Automotive 2.5V logic rail monitoring<\/li>
      • Electricity meter supervisory circuit with 9uA Iq<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        TPS3813K33DBVR<\/td>TI<\/td>2.93V threshold (monitors 3.3V)<\/td><\/tr>
        TPS3813L30DBVR<\/td>TI<\/td>2.64V threshold (monitors 3.0V)<\/td><\/tr>
        TPS3813I50DBVR<\/td>TI<\/td>4.55V threshold (monitors 5.0V)<\/td><\/tr>
        MAX6818MJE<\/td>ADI<\/td>Multi-voltage watchdog<\/td><\/tr>
        TSM1025ILT<\/td>ST<\/td>Window watchdog, similar function<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7547","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=7547"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7547\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7547"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}