{"id":7946,"date":"2026-06-28T06:01:46","date_gmt":"2026-06-28T06:01:46","guid":{"rendered":"https:\/\/materialparts.com\/lm393n-3\/"},"modified":"2026-06-28T11:45:29","modified_gmt":"2026-06-28T11:45:29","slug":"lm393n-3","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm393n-3\/","title":{"rendered":"LM393N"},"content":{"rendered":"

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

The LM393N from Texas Instruments is a dual differential comparator with open-collector outputs, 2V-36V supply range, ground-including common-mode range, and low power consumption in a compact 8-pin PDIP package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Number of Comparators<\/td>\n2 (dual, independent)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2V to 36V (single) or \u00b11V to \u00b118V (dual)<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n2mV typical, 5mV max<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n25nA typical<\/td>\n<\/tr>\n
Input Common-Mode Range<\/td>\n0V to V+\u22121.5V (includes ground)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nOpen-collector<\/td>\n<\/tr>\n
Output Sink Current<\/td>\n6mA min, 16mA typical<\/td>\n<\/tr>\n
Response Time<\/td>\n1.3\u00b5s typical<\/td>\n<\/tr>\n
Supply Current (both)<\/td>\n0.4mA typical<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPDIP-8 (9.81 x 6.35mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Two independent comparators in 8-pin DIP<\/li>\n
  • Open-collector outputs for wired-AND<\/li>\n
  • Input common-mode includes ground<\/li>\n
  • Low offset voltage: 2mV typical<\/li>\n
  • Low supply current: 0.4mA for both<\/li>\n
  • TTL\/CMOS compatible output<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Voltage threshold detection<\/li>\n
    • Window comparator<\/li>\n
    • Oscillator circuits<\/li>\n
    • Relay and LED driver<\/li>\n
    • Sensor signal conditioning<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM393N from Texas Instruments is a dual differential comparator with open-collector outputs, 2V-36V supply range, ground-including common-mode range, and low power consumption in a compact 8-pin PDIP package. Key Specifications Number of Comparators 2 (dual, independent) Supply Voltage 2V to 36V (single) or \u00b11V to \u00b118V (dual) Input Offset Voltage 2mV typical, […]<\/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":[21,13],"tags":[],"chip_brand":[138],"class_list":["post-7946","post","type-post","status-publish","format-standard","hentry","category-audio-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual comparator, open-collector, 2-36V, GND input, PDIP-8","date_code":"","package_case":"PDIP-8 (9.81 x 6.35 x 5.08mm, 2.54mm pitch, through-hole)","in_stock":18000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm393-n.pdf","price":"$0.35 @ 1ku","product_introduction":"The LM393N from Texas Instruments is the dual version of the LM339N, containing two independent comparators in a compact 8-pin PDIP package. It shares all the key characteristics of the LM339 family: open-collector outputs, ground-including input common-mode range, 2mV typical offset voltage, and 1.3\u00b5s response time. The smaller 8-pin package makes the LM393 ideal for applications needing only one or two comparators, saving board space compared to the 14-pin LM339. The open-collector outputs can be tied together for wired-AND logic \u2014 useful for window comparators where the output should be HIGH only when the input is within a specified range. The N suffix denotes the commercial temperature range (0\u00b0C to +70\u00b0C) in PDIP-8. For single-comparator applications, the TL331 (same family, one comparator, SOT-23) saves even more space.","working_principle":"Each comparator in the LM393N continuously monitors the voltage difference between its non-inverting (+) and inverting (\u2212) inputs. When V+ > V\u2212, the internal output transistor is OFF, and the open-collector output floats (appears HIGH through the external pull-up resistor). When V+ < V\u2212, the output transistor turns ON, sinking current to ground and pulling the output LOW. The comparator has no internal hysteresis; adding positive feedback (a resistor from output to the non-inverting input) creates hysteresis that prevents output oscillation when the input signal is near the threshold. The input common-mode range includes ground, meaning both inputs can be at 0V without causing phase inversion or latch-up. The open-collector output requires a pull-up resistor to a supply voltage (which can be different from the comparator's VCC), enabling level translation: the comparator can run from 12V while the output pulls up to 5V for TTL logic compatibility.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>1OUT<\/td>Output<\/td>Comparator 1 output (open-collector)<\/td><\/tr>\n
      2<\/td>1IN\u2212<\/td>Input<\/td>Comparator 1 inverting input<\/td><\/tr>\n
      3<\/td>1IN+<\/td>Input<\/td>Comparator 1 non-inverting input<\/td><\/tr>\n
      4<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      5<\/td>2IN+<\/td>Input<\/td>Comparator 2 non-inverting input<\/td><\/tr>\n
      6<\/td>2IN\u2212<\/td>Input<\/td>Comparator 2 inverting input<\/td><\/tr>\n
      7<\/td>2OUT<\/td>Output<\/td>Comparator 2 output (open-collector)<\/td><\/tr>\n
      8<\/td>VCC<\/td>Power<\/td>Supply (2V to 36V)<\/td><\/tr>\n<\/table>\n

      LM393N uses the PDIP-8 package with standard dual comparator pinout: Pin 1 = Output A (open-collector), Pin 2 = Inverting Input A (-), Pin 3 = Non-inverting Input A (+), Pin 4 = GND, Pin 5 = Non-inverting Input B (+), Pin 6 = Inverting Input B (-), Pin 7 = Output B (open-collector), Pin 8 = VCC. The open-collector outputs require external pull-up resistors to VCC or a separate logic supply. This allows output level shifting \u2014 the pull-up voltage can differ from VCC. Maximum output sink current is 16mA. Input common-mode range includes ground. Pinout is identical to LM2903, LM393A, and LM2903V comparators. For surface-mount, LM393DR (SOIC-8) provides the same pinout.<\/p>","application_scenarios":"

        \n
      • Window Comparator:<\/strong> Comp1: IN+=signal, IN\u2212=upper limit; Comp2: IN\u2212=signal, IN+=lower limit; outputs wired-AND; HIGH only when within window<\/li>\n
      • RC Oscillator:<\/strong> Output feeds back to IN+ through resistor divider; RC on IN\u2212; oscillates at ~1\/(2\u00d7R\u00d7C\u00d7ln(3))<\/li>\n
      • Sensor Threshold:<\/strong> IN+ = sensor voltage; IN\u2212 = reference (TL431 or divider); output drives relay or LED through transistor<\/li>\n
      • Overcurrent Detect:<\/strong> IN+ = shunt voltage; IN\u2212 = threshold; output trips shutdown circuit when current exceeds limit<\/li>\n
      • Level Shifter:<\/strong> Comparator at 12V supply; pull-up to 5V; converts 12V logic to 5V TTL-compatible output<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Specs<\/th><\/tr>\n
        LM393AN<\/td>TI<\/td>Improved version with lower 2mV max offset voltage for precision threshold detection circuits<\/td>DIP-8<\/td>1.3\u00b5s\/2-36V<\/td><\/tr>\n
        LM2903N<\/td>TI<\/td>Automotive-grade -40 to +125C version for under-hood and industrial comparator applications<\/td>DIP-8<\/td>1.3\u00b5s\/-40-125C<\/td><\/tr>\n
        LM339N<\/td>TI<\/td>Quad comparator version (4 channels) in DIP-14 for multi-channel threshold detection<\/td>DIP-14<\/td>1.3\u00b5s\/4-ch<\/td><\/tr>\n
        TLV3202AIDR<\/td>TI<\/td>High-speed 40ns dual comparator with push-pull output for fast signal detection<\/td>SOIC-8<\/td>40ns\/2.7-5.5V<\/td><\/tr>\n
        LTC6702IS8<\/td>ADI<\/td>Micro-power 18-bit configurable comparator with 200nA supply for battery monitoring<\/td>SOIC-8<\/td>18-bit\/200nA<\/td><\/tr>\n<\/table>\n

        LM393 is the industry-standard dual voltage comparator with open-drain output and 2-36V supply range. The 1.3\u00b5s response time suits general-purpose threshold detection. LM393AN offers lower offset voltage. LM339 provides 4 comparators in DIP-14. For high-speed applications, TLV3202 offers 40ns response with push-pull output at 2.7-5.5V supply.<\/p>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7946","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=7946"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7946\/revisions"}],"predecessor-version":[{"id":8226,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7946\/revisions\/8226"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7946"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}