{"id":7474,"date":"2026-06-24T07:10:17","date_gmt":"2026-06-24T07:10:17","guid":{"rendered":"https:\/\/materialparts.com\/mcp120t-270i-tt\/"},"modified":"2026-06-24T07:10:17","modified_gmt":"2026-06-24T07:10:17","slug":"mcp120t-270i-tt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/mcp120t-270i-tt\/","title":{"rendered":"MCP120T-270I\/TT"},"content":{"rendered":"

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

The MCP120T-270I\/TT from Microchip Technology is a microcontroller supervisory circuit with open-drain reset output and 2.625V trip voltage. Holding the microcontroller in reset until supply voltage stabilizes, it provides precision brown-out protection in a tiny SOT-23-3 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u529f\u80fd<\/td>\nVoltage Supervisor<\/td>\n<\/tr>\n
Trip Voltage<\/td>\n2.55V to 2.70V (270)<\/td>\n<\/tr>\n
Reset Output<\/td>\nActive low, open-drain<\/td>\n<\/tr>\n
Reset Timeout<\/td>\n350 ms (typical)<\/td>\n<\/tr>\n
Operating Voltage<\/td>\n1V to 5.5V<\/td>\n<\/tr>\n
Operating Current<\/td>\n45 \u03bcA (typical)<\/td>\n<\/tr>\n
Accuracy<\/td>\n\u00b175mV over temperature<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Precision 2.625V nominal trip voltage for 2.7V systems<\/li>\n
  • Open-drain active-low reset output<\/li>\n
  • 350ms reset timeout holds MCU in reset during stabilization<\/li>\n
  • Reset valid down to VCC = 1.0V for reliable power-down behavior<\/li>\n
  • Low 45\u03bcA typical operating current<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 2.7V microcontroller brown-out detection and reset<\/li>\n
    • Power supply monitoring in battery-operated systems<\/li>\n
    • Embedded system power-on reset generation<\/li>\n
    • FPGA and CPLD power sequencing supervision<\/li>\n
    • Industrial controller watchdog reset<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MCP120T-270I\/TT from Microchip Technology is a microcontroller supervisory circuit with open-drain reset output and 2.625V trip voltage. Holding the microcontroller in reset until supply voltage stabilizes, it provides precision brown-out protection in a tiny SOT-23-3 package. Key Specifications Function Voltage Supervisor Trip Voltage 2.55V to 2.70V (270) Reset Output Active low, open-drain […]<\/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":[13,32],"tags":[],"chip_brand":[134],"class_list":["post-7474","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-low-dropout-regulators-ldo","chip_brand-microchip"],"acf":{"brief_explanation":"Voltage supervisor, 2.625V trip, open-drain reset, 350ms timeout, SOT-23-3","date_code":"","package_case":"SOT-23-3 (2.9 x 1.3 mm)","in_stock":12456,"datasheet":"https:\/\/www.microchip.com\/en-us\/product\/MCP120","price":"\/tmp\/tmp3xrpk70n.sh.35 @ 1ku","product_introduction":"The MCP120T-270I\/TT from Microchip Technology is a voltage supervisory circuit designed to keep a microcontroller in reset until the system supply voltage reaches and stabilizes at the proper operating level, and to protect against brown-out conditions when the supply drops below safe levels. The -270 trip voltage variant has a nominal threshold of 2.625V (range 2.55V to 2.70V) with \u00b175mV accuracy over temperature, making it ideal for monitoring 2.7V logic supplies. The open-drain active-low reset output is asserted whenever VDD falls below the trip point and is held for 350ms after VDD rises above threshold, ensuring the microcontroller has sufficient time to stabilize before beginning execution.","working_principle":"The MCP120T-270I\/TT operates as a precision voltage detector. (1) The internal voltage reference and comparator continuously monitor the VDD supply voltage against the trip-point threshold (2.625V nominal for the -270 variant). When VDD drops below the trip point, the reset output is immediately asserted (driven low via the open-drain output). (2) When VDD rises above the trip point, the internal timeout counter begins, holding the reset output low for 350ms (typical) to allow the power supply and clock oscillator to stabilize before the microcontroller begins executing code. (3) The open-drain output requires an external pull-up resistor to the logic supply and can be wire-ORed with other open-drain reset sources. The reset function remains valid down to VDD = 1.0V, ensuring the microcontroller is held in a known state even during deep power-down transients.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Power supply (1V to 5.5V)<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td><\/tr>
      3<\/td>RESET<\/td>Active-low reset output (open-drain)<\/td><\/tr><\/table>","application_scenarios":"
      • 2.7V microcontroller power-on reset and brown-out protection<\/li>
      • Battery-powered system low-voltage detection and safe shutdown<\/li>
      • FPGA and CPLD configuration voltage monitoring during power-up<\/li>
      • Industrial controller supervisory reset for reliable startup<\/li>
      • Multi-voltage system power sequencing with open-drain wire-OR<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        MCP130T-270I\/TT<\/td>Microchip<\/td>With internal 5k\u03a9 pull-up resistor<\/td><\/tr>
        MCP120T-300I\/TT<\/td>Microchip<\/td>3.0V trip voltage variant<\/td><\/tr>
        MCP120T-315I\/TT<\/td>Microchip<\/td>3.15V trip voltage variant<\/td><\/tr>
        TLV803EA29DBZR<\/td>TI<\/td>2.93V supervisor, SOT-23-3<\/td><\/tr>
        MAX809TR29<\/td>Maxim<\/td>2.93V supervisor, SOT-23-3<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7474","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=7474"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7474\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7474"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}