{"id":7546,"date":"2026-06-26T04:21:47","date_gmt":"2026-06-26T04:21:47","guid":{"rendered":"https:\/\/materialparts.com\/tps3813k33dbvr\/"},"modified":"2026-06-26T04:21:47","modified_gmt":"2026-06-26T04:21:47","slug":"tps3813k33dbvr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps3813k33dbvr\/","title":{"rendered":"TPS3813K33DBVR"},"content":{"rendered":"

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

The TPS3813K33DBVR from Texas Instruments is a processor supervisory circuit with window watchdog timer and 2.93V voltage monitoring in SOT-23-6 package for safety-critical systems.<\/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\n
Threshold Voltage (VIT)<\/td>\n2.93 V (monitors 3.3V rail)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2V to 6V<\/td>\n<\/tr>\n
Supply Current<\/td>\n9 uA typical<\/td>\n<\/tr>\n
Reset Delay<\/td>\n25 ms fixed (power-on reset)<\/td>\n<\/tr>\n
Watchdog Type<\/td>\nWindow watchdog (programmable)<\/td>\n<\/tr>\n
Watchdog Timeout<\/td>\n0.25s to 2.5s (programmable via WDT pin)<\/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
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-6 (DBV suffix)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Window watchdog requires trigger within programmable time window<\/li>\n
  • 2.93V threshold monitors 3.3V supply rail<\/li>\n

9uA ultra-low supply current<\/li>\n<\/tr>\n
25ms fixed power-on reset delay<\/li>\nOpen-drain reset output for wired-OR<\/li>\n<\/ul>\n

\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
    \n
  • Safety-critical DSP and processor supervision<\/li>\n
  • Automotive ECU processor monitoring<\/li>\n
  • Industrial controller window watchdog<\/li>\n
  • Electricity meter supervisory circuit<\/li>\n
  • Medical infusion pump safety monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

    Product Overview The TPS3813K33DBVR from Texas Instruments is a processor supervisory circuit with window watchdog timer and 2.93V voltage monitoring in SOT-23-6 package for safety-critical systems. Key Specifications Threshold Voltage (VIT) 2.93 V (monitors 3.3V rail) Supply Voltage 2V to 6V Supply Current 9 uA typical Reset Delay 25 ms fixed (power-on reset) Watchdog Type […]<\/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-7546","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, 2.93V threshold, SOT-23-6","date_code":"","package_case":"SOT-23-6 (2.9 x 2.8 x 1.45 mm)","in_stock":8900,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps3813.pdf","price":"$0.76 @ 1ku","product_introduction":"The TPS3813K33DBVR from Texas Instruments is a processor supervisory circuit with a window watchdog timer designed for safety-critical applications. The device monitors a 3.3V supply rail with a 2.93V threshold voltage (+\/-2.4% accuracy) and provides an open-drain reset output. The window watchdog requires the supervised processor to trigger the WDI pin within a programmable time window; triggering too early or too late causes a reset. The watchdog timeout is programmable from 0.25s to 2.5s via the WDT pin (connect to GND, VDD, or external capacitor). The K33 suffix indicates 2.93V threshold for 3.3V rail monitoring. The DBVR suffix denotes SOT-23-6 package with tape and reel.","working_principle":"The TPS3813K33DBVR operates as a voltage supervisor with window watchdog. (1) The voltage supervisor monitors VDD through an internal resistor divider compared with a bandgap reference. When VDD drops below the 2.93V threshold, the RESET output asserts low. After VDD rises above the threshold, an internal 25ms timer delays the RESET de-assertion to ensure a proper system reset. (2) The window watchdog provides more stringent supervision than a standard watchdog. The supervised processor must trigger the WDI pin with a falling edge within a defined time window. The upper limit of the window is set by the WDT pin (0.25s, 1s, or 2.5s depending on connection). The lower limit (window ratio) is set by the WDR pin. If the processor triggers WDI too early (below the lower limit) or too late (above the upper limit), a reset is generated. (3) The 9uA supply current enables use in battery-powered systems. The open-drain reset output can be connected to other supervisor outputs in a wired-OR configuration for multi-voltage monitoring.","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":"
    • Safety-critical DSP and processor supervision with window watchdog<\/li>
    • Automotive ECU processor monitoring for ISO 26262 compliance<\/li>
    • Industrial controller window watchdog for SIL-rated systems<\/li>
    • Electricity meter supervisory circuit with 2.93V threshold<\/li>
    • Medical infusion pump safety monitoring with programmable window<\/li><\/ul>","alternative_models":"
      Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
      TPS3813J25DBVR<\/td>TI<\/td>2.25V threshold (monitors 2.5V)<\/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>
      TSM1025ILT<\/td>ST<\/td>Window watchdog, 2.93V, similar<\/td><\/tr>
      MAX6818MJE<\/td>ADI<\/td>Multi-voltage watchdog, different pkg<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7546","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=7546"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/7546\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=7546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=7546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=7546"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7546"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}