{"id":2152,"date":"2026-05-14T06:45:24","date_gmt":"2026-05-14T06:45:24","guid":{"rendered":"https:\/\/materialparts.com\/mmun2211lt1g\/"},"modified":"2026-05-14T06:45:24","modified_gmt":"2026-05-14T06:45:24","slug":"mmun2211lt1g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/mmun2211lt1g\/","title":{"rendered":"MMUN2211LT1G"},"content":{"rendered":"

Productos<\/h2>\n

The MMUN2211LT1G is an NPN bias resistor transistor (BRT \/ digital transistor) from onsemi, integrating a single NPN transistor with a monolithic bias resistor network (R1 = 10k\u03a9, R2 = 10k\u03a9) in a compact SOT-23-3 package. This pre-biased transistor simplifies circuit design by eliminating external bias resistors, reducing component count and board space. It is designed for general-purpose switching and digital interface applications.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Fabricante<\/td>\nonsemi<\/td>\n<\/tr>\n
Tipo<\/td>\nNPN Digital Transistor (BRT)<\/td>\n<\/tr>\n
Bias Resistor R1<\/td>\n10k\u03a9 (series base resistor)<\/td>\n<\/tr>\n
Bias Resistor R2<\/td>\n10k\u03a9 (base-emitter shunt resistor)<\/td>\n<\/tr>\n
Resistor Ratio R1\/R2<\/td>\n1<\/td>\n<\/tr>\n
VCEO (Collector-Emitter Voltage)<\/td>\n50V<\/td>\n<\/tr>\n
IC (Collector Current)<\/td>\n100mA<\/td>\n<\/tr>\n
hFE (DC Current Gain)<\/td>\n35 min (at IC = 5mA)<\/td>\n<\/tr>\n
VCE(sat) (Collector-Emitter Saturation)<\/td>\n0.3V max @ IC = 10mA<\/td>\n<\/tr>\n
Power Dissipation<\/td>\n246mW<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-55\u00b0C to +150\u00b0C<\/td>\n<\/tr>\n
Paquete<\/td>\nSOT-23-3 (TO-236)<\/td>\n<\/tr>\n
Budgetary Price<\/td>\n$0.03 @ 3ku<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Integrated bias resistors: R1 = 10k\u03a9, R2 = 10k\u03a9<\/li>\n
  • Eliminates external resistor components, reducing BOM and board space<\/li>\n
  • 50V collector-emitter voltage rating<\/li>\n
  • 100mA collector current capability<\/li>\n
  • Logic-level drive compatible via integrated base resistor<\/li>\n
  • SOT-23-3 surface-mount package<\/li>\n
  • Low VCE(sat): 0.3V max at 10mA<\/li>\n
  • Wide operating temperature: -55\u00b0C to +150\u00b0C<\/li>\n
  • Equivalent to DTC114EE \/ MUN2211<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • GPIO signal level conversion and interface<\/li>\n
    • Relay and LED driver circuits<\/li>\n
    • Digital logic signal buffering<\/li>\n
    • Microcontroller output expansion<\/li>\n
    • General-purpose switching and driver applications<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MMUN2211LT1G is an NPN bias resistor transistor (BRT \/ digital transistor) from onsemi, integrating a single NPN transistor with a monolithic bias resistor network (R1 = 10k\u03a9, R2 = 10k\u03a9) in a compact SOT-23-3 package. This pre-biased transistor simplifies circuit design by eliminating external bias resistors, reducing component count and board space. […]<\/p>\n","protected":false},"author":2,"featured_media":2163,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,25],"tags":[],"chip_brand":[182],"class_list":["post-2152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-onsemi"],"acf":{"brief_explanation":"NPN digital transistor, R1=10k\u03a9 R2=10k\u03a9, 50V, 100mA, SOT-23-3, pre-biased BRT switch","date_code":"","package_case":"SOT-23-3 (TO-236, SC-59)","in_stock":8500,"datasheet":"https:\/\/www.onsemi.com\/products\/discrete\/digital-transistors\/MMUN2211LT1G","price":"$0.03 @ 3ku","product_introduction":"The MMUN2211LT1G is an NPN bias resistor transistor (BRT) from onsemi's digital transistor series, integrating a single NPN switching transistor with a monolithic bias resistor network consisting of R1 = 10k\u03a9 (series base resistor) and R2 = 10k\u03a9 (base-emitter shunt resistor). This pre-biased configuration eliminates the need for external bias resistors, reducing component count from three (transistor + two resistors) to one, simplifying PCB layout and saving board space. The 10k\u03a9\/10k\u03a9 resistor values (R1\/R2 ratio = 1) are optimized for direct drive from 5V logic outputs, providing appropriate base drive current while the shunt resistor ensures fast turn-off. The device is rated for 50V VCEO, 100mA collector current, and 246mW power dissipation, suitable for general-purpose switching, signal interfacing, and driver applications.","working_principle":"

      Bias Resistor Network<\/h3>\n

      The MMUN2211LT1G integrates two resistors with the NPN transistor. R1 (10k\u03a9) is connected in series between the external base input pin and the internal transistor base, limiting base drive current. R2 (10k\u03a9) is connected between the internal base and emitter, providing a discharge path for stored base charge during turn-off and ensuring the transistor remains off when the input is floating or driven low.<\/p>\n\n

      Switching Operation<\/h3>\n

      When a logic HIGH voltage (e.g., 5V) is applied to the input pin, current flows through R1 into the transistor base, turning it on and saturating the collector-emitter junction. The base current is approximately (VIN - VBE) \/ R1. When the input goes LOW, R2 provides a discharge path for the base stored charge, ensuring fast turn-off. The R1\/R2 ratio of 1 provides balanced on\/off switching performance for 5V logic drive.<\/p>\n\n

      Input Voltage Considerations<\/h3>\n

      With R1 = 10k\u03a9, a 5V input produces approximately 430\u00b5A base current (assuming VBE = 0.7V), sufficient to drive the transistor into saturation at collector currents up to 15-20mA (hFE min = 35). For 3.3V logic, base current is reduced to approximately 260\u00b5A, supporting lower collector currents. Designers must verify saturation at their specific operating conditions.<\/p>","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>B (Base)<\/td>Input<\/td>Base input (connects to internal R1, driven by logic signal)<\/td><\/tr>\n
      2<\/td>E (Emitter)<\/td>Ground<\/td>Emitter terminal (connected to ground)<\/td><\/tr>\n
      3<\/td>C (Collector)<\/td>Output<\/td>Collector terminal (connects to load)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • GPIO signal level conversion and digital interfacing where integrated bias resistors eliminate external components<\/li>\n
      • Relay and LED driver circuits where the pre-biased transistor directly connects to microcontroller outputs<\/li>\n
      • Digital logic signal buffering and inversion in control systems with minimal component count<\/li>\n
      • Microcontroller output expansion for driving multiple loads from limited I\/O pins<\/li>\n
      • General-purpose low-side switching where the single-component BRT replaces transistor + two resistors<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Rohm<\/td>DTC114EE<\/td>SOT-23-3<\/td>Pin-compatible, R1=10k\u03a9 R2=10k\u03a9, equivalent<\/td><\/tr>\n
        onsemi<\/td>MMUN2212LT1G<\/td>SOT-23-3<\/td>R1=22k\u03a9 R2=22k\u03a9, same family, higher resistance<\/td><\/tr>\n
        onsemi<\/td>MMUN2213LT1G<\/td>SOT-23-3<\/td>R1=47k\u03a9 R2=47k\u03a9, lower base drive current<\/td><\/tr>\n
        onsemi<\/td>MMUN2214LT1G<\/td>SOT-23-3<\/td>R1=10k\u03a9 R2=47k\u03a9, faster turn-off, lower off-state leakage<\/td><\/tr>\n
        NXP<\/td>PDTA114ET<\/td>SOT-23-3<\/td>PNP equivalent, R1=10k\u03a9 R2=10k\u03a9, complementary pair<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2152","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=2152"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2152\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media\/2163"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=2152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=2152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=2152"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=2152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}