{"id":2950,"date":"2026-05-28T15:08:20","date_gmt":"2026-05-28T15:08:20","guid":{"rendered":"https:\/\/materialparts.com\/lm139j\/"},"modified":"2026-05-28T15:08:20","modified_gmt":"2026-05-28T15:08:20","slug":"lm139j","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm139j\/","title":{"rendered":"LM139J"},"content":{"rendered":"

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

The LM139J from Texas Instruments is a quad differential comparator in a CDIP-14 package rated for the full military temperature range of -55\u00b0C to +125\u00b0C. It consists of four independent precision voltage comparators designed to operate from a single power supply over a wide range of 2V to 36V, featuring low power consumption, open-collector outputs, and input common-mode range that includes ground.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n4 independent comparators<\/td>\n<\/tr>\n
Supply Voltage Range<\/td>\n2V to 36V (single) or +\/-1V to +\/-18V (dual)<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n5 mV max (military grade)<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n25 nA typical<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nOpen-collector<\/td>\n<\/tr>\n
Response Time<\/td>\n1.3 \u00b5s typical<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nCDIP-14 (21.30 x 7.60 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Four independent precision comparators in one package<\/li>\n
  • Wide single supply voltage range: 2V to 36V<\/li>\n
  • Input common-mode voltage range includes ground<\/li>\n
  • Low input bias current: 25 nA typical<\/li>\n
  • Open-collector outputs for wired-AND connections<\/li>\n
  • Low output saturation voltage: 250 mV at 4 mA<\/li>\n
  • Compatible with TTL, DTL, ECL, MOS, and CMOS logic<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Military and aerospace systems requiring full mil-temp range<\/li>\n
    • Zero-crossing detectors and level shifters<\/li>\n
    • Window comparators and threshold detectors<\/li>\n
    • Oscillator and timing circuits<\/li>\n
    • Industrial control and instrumentation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM139J from Texas Instruments is a quad differential comparator in a CDIP-14 package rated for the full military temperature range of -55\u00b0C to +125\u00b0C. It consists of four independent precision voltage comparators designed to operate from a single power supply over a wide range of 2V to 36V, featuring low power consumption, […]<\/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":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-2950","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad differential comparator, mil-temp -55\/+125C, open-collector, CDIP-14","date_code":"","package_case":"CDIP-14 (21.30 x 7.60 mm)","in_stock":14149,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm139-n.pdf","price":"","product_introduction":"The LM139J is a military-grade quad differential comparator from Texas Instruments, characterized for operation over the full military temperature range of -55\u00b0C to +125\u00b0C. It comprises four independent precision voltage comparators in a hermetic CDIP-14 package. Each comparator features an open-collector output capable of sinking up to 16 mA, low input bias current of 25 nA, and an input common-mode range that includes ground. The devices are designed to operate from a single power supply or dual supplies, making them versatile for a wide range of military and industrial applications.","working_principle":"Each of the four comparators in the LM139J compares the voltage at its inverting input (-) against the voltage at its non-inverting input (+). When the non-inverting input is higher than the inverting input plus the offset voltage, the open-collector output transistor turns off (high impedance). When the inverting input exceeds the non-inverting input plus offset, the output transistor turns on and sinks current to ground. The open-collector configuration allows multiple outputs to be wired-AND connected. The input stage uses a differential pair with PNP transistors, enabling the common-mode range to extend to ground even on single supply. A compensation capacitor provides stable operation without external components.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>OUT2<\/td>Output<\/td>Comparator 2 open-collector output<\/td><\/tr>
      2<\/td>OUT1<\/td>Output<\/td>Comparator 1 open-collector output<\/td><\/tr>
      3<\/td>VCC<\/td>Power<\/td>Positive supply voltage (2-36V)<\/td><\/tr>
      4<\/td>IN1-<\/td>Input<\/td>Comparator 1 inverting input<\/td><\/tr>
      5<\/td>IN1+<\/td>Input<\/td>Comparator 1 non-inverting input<\/td><\/tr>
      6<\/td>IN2-<\/td>Input<\/td>Comparator 2 inverting input<\/td><\/tr>
      7<\/td>IN2+<\/td>Input<\/td>Comparator 2 non-inverting input<\/td><\/tr>
      8<\/td>IN3-<\/td>Input<\/td>Comparator 3 inverting input<\/td><\/tr>
      9<\/td>IN3+<\/td>Input<\/td>Comparator 3 non-inverting input<\/td><\/tr>
      10<\/td>IN4-<\/td>Input<\/td>Comparator 4 inverting input<\/td><\/tr>
      11<\/td>IN4+<\/td>Input<\/td>Comparator 4 non-inverting input<\/td><\/tr>
      12<\/td>GND<\/td>Power<\/td>Ground \/ negative supply<\/td><\/tr>
      13<\/td>OUT4<\/td>Output<\/td>Comparator 4 open-collector output<\/td><\/tr>
      14<\/td>OUT3<\/td>Output<\/td>Comparator 3 open-collector output<\/td><\/tr><\/table>","application_scenarios":"
      • Military and aerospace systems requiring -55\u00b0C to +125\u00b0C operation<\/li>
      • Zero-crossing detectors in power line monitoring<\/li>
      • Window comparators for over\/under voltage detection<\/li>
      • Relay and lamp driver circuits using open-collector output<\/li>
      • Industrial instrumentation and process control<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM239J<\/td>CDIP-14<\/td>-25\u00b0C to +125\u00b0C industrial grade<\/td><\/tr>
        TI<\/td>LM339J<\/td>CDIP-14<\/td>0\u00b0C to +70\u00b0C commercial grade<\/td><\/tr>
        TI<\/td>LM2901J<\/td>CDIP-14<\/td>-40\u00b0C to +125\u00b0C automotive grade<\/td><\/tr>
        STMicroelectronics<\/td>LM139D<\/td>SOIC-14<\/td>Mil-temp, SOIC package<\/td><\/tr>
        onsemi<\/td>LM139J<\/td>CDIP-14<\/td>Second-source equivalent<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2950","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=2950"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2950\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2950"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}