{"id":6427,"date":"2026-06-16T03:33:00","date_gmt":"2026-06-16T03:33:00","guid":{"rendered":"https:\/\/materialparts.com\/max815tesat\/"},"modified":"2026-06-16T03:33:00","modified_gmt":"2026-06-16T03:33:00","slug":"max815tesat","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/max815tesat\/","title":{"rendered":"MAX815TESA+T"},"content":{"rendered":"

Productos<\/h2>\n

The MAX815TESA+T is a high-accuracy microprocessor supervisory circuit from Analog Devices (formerly Maxim Integrated). It provides power-on reset, watchdog timer, and power-fail comparator functions in a compact 8-SOIC package. The T-suffix version features a 3.03V reset threshold, making it suitable for 3.3V systems. With \u00b11% threshold accuracy and only 75\u00b5A max supply current, it ensures reliable system initialization and monitoring in critical applications.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Tipo<\/td>\nSimple Reset\/Power-On Reset<\/td>\n<\/tr>\n
Reset Threshold<\/td>\n3.03V (T suffix)<\/td>\n<\/tr>\n
Threshold Accuracy<\/td>\n\u00b11%<\/td>\n<\/tr>\n
Reset Timeout<\/td>\n140ms minimum<\/td>\n<\/tr>\n
Supply Current<\/td>\n75\u00b5A max<\/td>\n<\/tr>\n
Output Type<\/td>\nPush-Pull, Totem Pole (Active Low)<\/td>\n<\/tr>\n
Watchdog Timeout<\/td>\n1.56s<\/td>\n<\/tr>\n
Power-Fail Comparator<\/td>\n1.70V threshold<\/td>\n<\/tr>\n
Manual Reset<\/td>\nYes<\/td>\n<\/tr>\n
Paquete<\/td>\n8-SOIC (3.9mm width)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • \u00b11% reset threshold accuracy for reliable system monitoring<\/li>\n
  • Guaranteed RESET valid down to VCC = 1V<\/li>\n
  • Independent watchdog timer with 1.56s timeout<\/li>\n
  • Power-fail comparator with 1.70V threshold<\/li>\n
  • Manual reset input<\/li>\n
  • Push-pull totem pole RESET output (active low)<\/li>\n
  • Low supply current: 75\u00b5A max<\/li>\n
  • Power-supply glitch immunity<\/li>\n
  • 200ms reset time delay<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Microprocessor and DSP system supervision<\/li>\n
    • 3.3V and 5V logic power monitoring<\/li>\n
    • Battery-powered equipment supervision<\/li>\n
    • Critical system power-fail detection<\/li>\n
    • Embedded controllers and industrial automation<\/li>\n
    • Automotive ECUs requiring high-accuracy reset<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX815TESA+T is a high-accuracy microprocessor supervisory circuit from Analog Devices (formerly Maxim Integrated). It provides power-on reset, watchdog timer, and power-fail comparator functions in a compact 8-SOIC package. The T-suffix version features a 3.03V reset threshold, making it suitable for 3.3V systems. With \u00b11% threshold accuracy and only 75\u00b5A max supply current, […]<\/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":[165],"class_list":["post-6427","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-adi"],"acf":{"brief_explanation":"High-accuracy uP supervisor with \u00b11% threshold, 3.03V reset, watchdog timer, power-fail comparator in 8-SOIC","date_code":"","package_case":"8-SOIC (3.90mm width)","in_stock":5320,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX814-MAX816.pdf","price":"$3.38 @ 1ku","product_introduction":"The MAX815TESA+T is a precision microprocessor supervisory circuit from Analog Devices\/Maxim Integrated, part of the MAX814\/MAX815\/MAX816 family. It provides three critical monitoring functions in a single 8-SOIC package: power-on reset with \u00b11% threshold accuracy, an independent watchdog timer with 1.56-second timeout, and a power-fail comparator with a 1.70V threshold. The T-suffix indicates a 3.03V reset threshold, optimized for 3.3V systems with tight voltage tolerances. The push-pull totem pole RESET output is guaranteed valid down to VCC = 1V, ensuring reliable processor initialization even during slow supply ramps or brownout conditions. A manual reset input allows external triggering of the reset function.","working_principle":"The MAX815 continuously monitors the VCC supply voltage against its precision internal reference. When VCC falls below the 3.03V reset threshold, the RESET output asserts low within nanoseconds. Once VCC rises above the threshold, a 140ms minimum reset timeout holds RESET low to allow the power supply and processor to stabilize. The watchdog timer monitors activity on the WDI pin; if no transition occurs within 1.56 seconds, the WDO output asserts low, indicating a software hang. The power-fail comparator has an independent 1.70V threshold on the PFI pin, providing early warning of impending power failure via the PFO output before the main reset threshold is reached.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td><\/tr>
      2<\/td>PFI<\/td>Power-fail input (threshold = 1.70V)<\/td><\/tr>
      3<\/td>PFO<\/td>Power-fail output (low when PFI below threshold)<\/td><\/tr>
      4<\/td>WDI<\/td>Watchdog input (transition resets timer)<\/td><\/tr>
      5<\/td>WDO<\/td>Watchdog output (low on timeout or VCC below threshold)<\/td><\/tr>
      6<\/td>RESET<\/td>Active-low reset output (push-pull totem pole)<\/td><\/tr>
      7<\/td>MR<\/td>Manual reset input (active low)<\/td><\/tr>
      8<\/td>VCC<\/td>Power supply (1.2V to 5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • 3.3V Microcontroller Supervision:<\/b> The 3.03V threshold provides early reset warning for 3.3V systems with \u00b15% tolerance, ensuring the MCU is held in reset before VCC drops below 3.15V (3.3V minus 5%). Connect RESET to the MCU active-low reset pin. Add a 100k\u03a9 pulldown on RESET for valid output below 1V.<\/li>
      • Power-Fail Early Warning:<\/b> Use the PFI\/PFO comparator to monitor an upstream supply rail (e.g., 12V via resistor divider) before it reaches the 3.3V regulator. PFO can trigger an interrupt on the MCU, allowing graceful shutdown and data saving before the main reset occurs.<\/li>
      • Watchdog for Software Reliability:<\/b> Connect WDI to a GPIO pin toggled by the firmware's main loop. If the software hangs, the 1.56s watchdog timeout asserts WDO, which can be connected to MR to force a system reset, recovering from crashes automatically.<\/li><\/ul>","alternative_models":"
        Model<\/th>Threshold<\/th>Watchdog<\/th>PFI<\/th>Key Difference<\/th><\/tr>
        MAX814TEPA+T<\/td>3.03V<\/td>No<\/td>Yes<\/td>RESET + RESET outputs, no watchdog<\/td><\/tr>
        MAX816TEPA+T<\/td>Adj.<\/td>No<\/td>Yes<\/td>Adjustable reset threshold<\/td><\/tr>
        TMPM369Y2AW<\/td>3.08V<\/td>Yes<\/td>No<\/td>Similar supervisor with different threshold<\/td><\/tr>
        TPS3823-33DBVR<\/td>2.93V<\/td>Yes<\/td>No<\/td>Open-drain reset, TI alternative<\/td><\/tr>
        MCP131T-300E\/TT<\/td>3.00V<\/td>Yes<\/td>No<\/td>Push-pull, Microchip alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6427"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6427\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6427"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}