{"id":2515,"date":"2026-05-22T03:29:02","date_gmt":"2026-05-22T03:29:02","guid":{"rendered":"https:\/\/materialparts.com\/lm339n\/"},"modified":"2026-05-22T03:29:02","modified_gmt":"2026-05-22T03:29:02","slug":"lm339n","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm339n\/","title":{"rendered":"LM339N"},"content":{"rendered":"

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

The LM339N is a quad differential comparator manufactured by Texas Instruments. It consists of four independent voltage comparators designed to operate from a single power supply over a wide range of voltages. The device features low input bias current, low offset voltage, and outputs that can sink up to 25mA, making it one of the most popular general-purpose comparators for industrial and consumer applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u901a\u9053\u6570<\/td>\n4<\/td>\n<\/tr>\n
Supply Voltage Range<\/td>\n2V to 36V single, +\/-1V to +\/-18V dual<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n5mV max<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n25nA typical<\/td>\n<\/tr>\n
Response Time<\/td>\n1.3us typical<\/td>\n<\/tr>\n
Output Sink Current<\/td>\n16mA typical<\/td>\n<\/tr>\n
Input Common-Mode Range<\/td>\n0V to VCC-1.5V<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0C to 70C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPDIP-14<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Four independent comparators in one package<\/li>\n
  • Wide supply voltage range (2V to 36V)<\/li>\n
  • Input common-mode range includes ground<\/li>\n
  • Open-collector outputs for wired-OR<\/li>\n
  • Low input bias current (25nA)<\/li>\n
  • Fast response time (1.3us)<\/li>\n
  • Compatible with all logic families<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Voltage level detection and comparison<\/li>\n
    • Zero-crossing detectors<\/li>\n
    • Oscillator and timing circuits<\/li>\n
    • Battery monitoring circuits<\/li>\n
    • Window comparators and threshold detectors<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM339N is a quad differential comparator manufactured by Texas Instruments. It consists of four independent voltage comparators designed to operate from a single power supply over a wide range of voltages. The device features low input bias current, low offset voltage, and outputs that can sink up to 25mA, making it one […]<\/p>\n","protected":false},"author":2,"featured_media":2594,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[138],"class_list":["post-2515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad Differential Comparator, 2-36V supply, open-collector output, PDIP-14","date_code":"","package_case":"PDIP-14 (19.18 x 6.35 x 5.08 mm)","in_stock":7543,"datasheet":"https:\/\/www.ti.com\/product\/LM339","price":"$0.44 @ 1ku","product_introduction":"The LM339N from Texas Instruments is a quad differential comparator in a 14-pin DIP package. It contains four independent comparators with open-collector outputs, each capable of sinking up to 16mA. The device operates from a single 2V to 36V supply with input common-mode range that includes ground. Its open-collector output configuration allows wired-OR connections and direct interface with TTL and CMOS logic families. The LM339 is one of the most widely used comparators in industrial and consumer electronics.","working_principle":"Each comparator in the LM339N consists of a differential input stage and an open-collector output stage. The comparator continuously monitors the voltage difference between its inverting and non-inverting inputs. When the non-inverting input voltage exceeds the inverting input, the output transistor turns off (open circuit). When the inverting input exceeds the non-inverting input, the output transistor turns on, sinking current to ground. The open-collector output requires an external pull-up resistor to establish the high logic level. This configuration allows multiple outputs to be connected together for wired-OR logic.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>2OUT<\/td>Output<\/td>Comparator 2 output<\/td><\/tr>
      2<\/td>2OUT<\/td>Output<\/td>Comparator 1 output<\/td><\/tr>
      3<\/td>VCC<\/td>Power<\/td>Positive supply (2-36V)<\/td><\/tr>
      4<\/td>1IN-<\/td>Input<\/td>Comparator 1 inverting input<\/td><\/tr>
      5<\/td>1IN+<\/td>Input<\/td>Comparator 1 non-inverting input<\/td><\/tr>
      6<\/td>2IN-<\/td>Input<\/td>Comparator 2 inverting input<\/td><\/tr>
      7<\/td>2IN+<\/td>Input<\/td>Comparator 2 non-inverting input<\/td><\/tr>
      8<\/td>3IN-<\/td>Input<\/td>Comparator 3 inverting input<\/td><\/tr>
      9<\/td>3IN+<\/td>Input<\/td>Comparator 3 non-inverting input<\/td><\/tr>
      10<\/td>4IN-<\/td>Input<\/td>Comparator 4 inverting input<\/td><\/tr>
      11<\/td>4IN+<\/td>Input<\/td>Comparator 4 non-inverting input<\/td><\/tr>
      12<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      13<\/td>4OUT<\/td>Output<\/td>Comparator 4 output<\/td><\/tr>
      14<\/td>3OUT<\/td>Output<\/td>Comparator 3 output<\/td><\/tr><\/table>","application_scenarios":"
      • Voltage level detection and battery monitoring<\/li>
      • Zero-crossing detection in AC signal processing<\/li>
      • Window comparators for alarm and trip circuits<\/li>
      • Oscillator and timing waveform generators<\/li>
      • Logic level translation between different voltage domains<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>LM339N<\/td>PDIP-14<\/td>Direct equivalent<\/td><\/tr>
        STMicroelectronics<\/td>LM339DT<\/td>SOIC-14<\/td>SMD version<\/td><\/tr>
        Texas Instruments<\/td>LM2901N<\/td>PDIP-14<\/td>Automotive grade, extended temp<\/td><\/tr>
        Microchip<\/td>MCP6544-I\/P<\/td>PDIP-14<\/td>Push-pull output, low voltage alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2515","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=2515"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2515\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2594"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2515"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}