{"id":3557,"date":"2026-06-06T10:26:00","date_gmt":"2026-06-06T10:26:00","guid":{"rendered":"https:\/\/materialparts.com\/max813lesat\/"},"modified":"2026-06-06T10:26:00","modified_gmt":"2026-06-06T10:26:00","slug":"max813lesat","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/max813lesat\/","title":{"rendered":"MAX813LESA+T"},"content":{"rendered":"

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

The MAX813LESA+T from Analog Devices (formerly Maxim) is a low-cost microprocessor supervisory circuit providing reset, watchdog, and power-fail monitoring. With a 4.65V reset threshold and active-high RESET output, it includes a 1.6-second watchdog timer, 200 ms reset timeout, manual reset input, and a 1.25V threshold detector for power-fail warning. The ESA+T denotes the SOIC-8 industrial tape-and-reel version.<\/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
\u0627\u0644\u0646\u0648\u0639<\/td>\nMicroprocessor Supervisor<\/td>\n<\/tr>\n
Reset Threshold<\/td>\n4.65V (nominal)<\/td>\n<\/tr>\n
Reset Output<\/td>\nActive-High, Push-Pull<\/td>\n<\/tr>\n
Reset Timeout<\/td>\n200 ms (typ)<\/td>\n<\/tr>\n
Watchdog Timeout<\/td>\n1.6 seconds (typ)<\/td>\n<\/tr>\n
PFI Threshold<\/td>\n1.25V (power-fail input)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n1.2V – 5.5V<\/td>\n<\/tr>\n
Supply Current<\/td>\n150 uA (typ)<\/td>\n<\/tr>\n
Manual Reset<\/td>\nYes (debounced, active low)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-8 Narrow<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 4.65V precision reset threshold for 5V systems<\/li>\n
  • Active-high push-pull RESET output (no pull-up needed)<\/li>\n
  • 1.6-second watchdog timer with independent WDO output<\/li>\n
  • Debounced manual reset input (MR, active low)<\/li>\n
  • 1.25V threshold detector for power-fail warning (PFI\/PFO)<\/li>\n
  • Reset valid down to VCC = 1V<\/li>\n
  • 200 ms reset pulse width<\/li>\n
  • Low 150 uA supply current<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 5V microprocessor system reset and supervision<\/li>\n
    • Power-fail warning for battery backup systems<\/li>\n
    • Watchdog monitoring for critical embedded controllers<\/li>\n
    • Industrial controller supervision and fault detection<\/li>\n
    • Portable instrument power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX813LESA+T from Analog Devices (formerly Maxim) is a low-cost microprocessor supervisory circuit providing reset, watchdog, and power-fail monitoring. With a 4.65V reset threshold and active-high RESET output, it includes a 1.6-second watchdog timer, 200 ms reset timeout, manual reset input, and a 1.25V threshold detector for power-fail warning. The ESA+T denotes the […]<\/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":[165],"class_list":["post-3557","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-adi"],"acf":{"brief_explanation":"Microprocessor supervisor, 4.65V reset, active-high, watchdog, manual reset, SOIC-8","date_code":"","package_case":"SOIC-8 Narrow (3.90 x 4.90 x 1.27 mm)","in_stock":10975,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX705-MAX708-MAX813L.pdf","price":"$0.80 @ 1ku","product_introduction":"The MAX813LESA+T from Analog Devices (formerly Maxim Integrated) is a low-cost microprocessor supervisory circuit that integrates reset generation, watchdog monitoring, and power-fail detection in a single SOIC-8 package. It provides a 4.65V precision reset threshold with an active-high push-pull RESET output, eliminating the need for an external pull-up resistor. The independent watchdog output (WDO) goes low if the watchdog input (WDI) is not toggled within 1.6 seconds. A 1.25V threshold detector with PFI input and PFO output monitors an unregulated supply for early power-fail warning. The debounced manual reset input (MR) allows push-button reset.","working_principle":"The MAX813LESA+T monitors VCC through an internal resistive divider and bandgap reference. When VCC drops below 4.65V, the RESET output is asserted high. After VCC rises above the threshold, RESET remains active for 200 ms (reset timeout) to allow the microprocessor and power supply to stabilize. The watchdog timer is a monostable multivibrator triggered by transitions on WDI; if no transition occurs within 1.6 seconds, WDO goes low. The PFI comparator compares the voltage at the PFI pin against the internal 1.25V reference; when PFI drops below 1.25V, PFO goes low, providing early warning of power failure. The MR input is debounced and ORed with the internal reset generator.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>MR<\/td>Input<\/td>Manual reset input (active low, debounced)<\/td><\/tr>
      2<\/td>VCC<\/td>Power<\/td>Supply voltage (1.2-5.5V)<\/td><\/tr>
      3<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      4<\/td>PFI<\/td>Input<\/td>Power-fail input (1.25V threshold)<\/td><\/tr>
      5<\/td>PFO<\/td>Output<\/td>Power-fail output (active low)<\/td><\/tr>
      6<\/td>WDI<\/td>Input<\/td>Watchdog input<\/td><\/tr>
      7<\/td>RESET<\/td>Output<\/td>Reset output (active high, push-pull)<\/td><\/tr>
      8<\/td>WDO<\/td>Output<\/td>Watchdog output (active low)<\/td><\/tr><\/table>","application_scenarios":"
      • 5V MCU supervision: Power-on reset and brownout detection for 5V microcontrollers<\/li>
      • Watchdog: Hardware fault detection with 1.6s timeout for critical controllers<\/li>
      • Power-fail warning: Early detection for battery backup and graceful shutdown<\/li>
      • Manual reset: Debounced push-button interface for operator-initiated reset<\/li>
      • Industrial PLC: Comprehensive power and software supervision in one chip<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ADI<\/td>MAX707ESA+T<\/td>SOIC-8<\/td>Active-low RESET, same function<\/td><\/tr>
        TI<\/td>TPS3823-33DBVR<\/td>SOT-23-5<\/td>Watchdog, 3.08V threshold, smaller pkg<\/td><\/tr>
        TI<\/td>TPS3839K33DBVR<\/td>SOT-23-3<\/td>Voltage monitor only, 2.93V, nano-power<\/td><\/tr>
        Microchip<\/td>TC1232COA<\/td>SOIC-8<\/td>Watchdog supervisor, pin-compatible<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3557","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=3557"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3557\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3557"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3557"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}