{"id":8489,"date":"2026-06-29T02:54:29","date_gmt":"2026-06-29T02:54:29","guid":{"rendered":"https:\/\/materialparts.com\/lm393p\/"},"modified":"2026-06-29T06:28:06","modified_gmt":"2026-06-29T06:28:06","slug":"lm393p","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm393p\/","title":{"rendered":"LM393P"},"content":{"rendered":"

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

The LM393P from Texas Instruments is a dual differential comparator in a DIP-8 through-hole package, featuring an operating voltage range from 2V to 36V, open-collector outputs, and 1.3 \u00b5s typical response time. It is one of the most widely used general-purpose comparators in electronics, suitable for voltage comparison, zero-crossing detection, and oscillator circuits across consumer and industrial applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n2 (dual)<\/td>\n<\/tr>\n
Supply Voltage Range<\/td>\n2V to 36V (single) \/ \u00b11V to \u00b118V (dual)<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n5 mV max (25\u00b0C)<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n50 nA max<\/td>\n<\/tr>\n
Response Time<\/td>\n1.3 \u00b5s typ (large signal)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nOpen-collector (requires pull-up)<\/td>\n<\/tr>\n
Output Sink Current<\/td>\n16 mA min<\/td>\n<\/tr>\n
Input Common-Mode Range<\/td>\n0V to VCC-1.5V<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +70\u00b0C (commercial)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nDIP-8 (through-hole)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide supply voltage range from 2V to 36V<\/li>\n
  • Open-collector output for wired-OR logic<\/li>\n
  • Low input bias current of 25 nA typical<\/li>\n
  • Dual independent comparators in single package<\/li>\n
  • Output compatible with TTL, MOS, and CMOS logic<\/li>\n
  • No external frequency compensation required<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Voltage level comparison and threshold detection<\/li>\n
    • Zero-crossing detection in AC circuits<\/li>\n
    • Relaxation oscillators and timing circuits<\/li>\n
    • Window comparators for alarm systems<\/li>\n
    • Battery low-voltage indicators<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM393P from Texas Instruments is a dual differential comparator in a DIP-8 through-hole package, featuring an operating voltage range from 2V to 36V, open-collector outputs, and 1.3 \u00b5s typical response time. It is one of the most widely used general-purpose comparators in electronics, suitable for voltage comparison, zero-crossing detection, and oscillator circuits […]<\/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":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-8489","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual comparator, 2-36V, open-collector, 1.3\u00b5s, DIP-8, general purpose","date_code":"","package_case":"DIP-8 (9.81 x 6.35 x 4.57 mm)","in_stock":5658,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm393.pdf","price":"$0.28 @ 1ku","product_introduction":"The Texas Instruments LM393P is the industry-standard dual differential comparator in a DIP-8 through-hole package. It consists of two independent voltage comparators designed to operate from a single power supply over a wide 2V to 36V range, or from dual supplies up to \u00b118V. The open-collector output configuration allows wired-OR connections and level shifting to any voltage up to 36V independent of the supply, making it versatile for interfacing between different voltage domains. With a typical response time of 1.3 \u00b5s and input bias current of 25 nA, it provides adequate performance for most general-purpose comparison applications. The LM393 is one of the most ubiquitous comparator ICs in the electronics industry, with multiple second-source manufacturers ensuring long-term availability.","working_principle":"The LM393P consists of two independent differential comparators, each comparing the voltage at the non-inverting input (+) against the inverting input (-). When the non-inverting input voltage exceeds the inverting input by more than the input offset voltage (typically 1-5 mV), the output transistor turns off, allowing the open-collector output to be pulled high by an external pull-up resistor. When the inverting input exceeds the non-inverting input, the output transistor turns on, sinking current to ground. The open-collector configuration provides several advantages: wired-OR logic by connecting multiple outputs together, level shifting to voltages higher than the supply (the output can be pulled up to 36V regardless of VCC), and current sinking capability of up to 16 mA. The input common-mode range extends from ground to VCC-1.5V, limiting the usable input range near the positive supply rail. No external compensation is required for stable operation.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>1OUT<\/td>Comparator 1 Output (Open-Collector)<\/td><\/tr>
      2<\/td>1IN-<\/td>Comparator 1 Inverting Input<\/td><\/tr>
      3<\/td>1IN+<\/td>Comparator 1 Non-Inverting Input<\/td><\/tr>
      4<\/td>GND<\/td>Ground \/ Negative Supply<\/td><\/tr>
      5<\/td>2IN+<\/td>Comparator 2 Non-Inverting Input<\/td><\/tr>
      6<\/td>2IN-<\/td>Comparator 2 Inverting Input<\/td><\/tr>
      7<\/td>2OUT<\/td>Comparator 2 Output (Open-Collector)<\/td><\/tr>
      8<\/td>VCC<\/td>Positive Supply (2-36V)<\/td><\/tr><\/table>","application_scenarios":"
      • Threshold Detection<\/b>: Comparing a sensor voltage against a reference to trigger alarms or control actions in industrial monitoring systems<\/li>
      • Zero-Crossing Detection<\/b>: Detecting AC mains zero crossings for triac\/SSR phase-angle control in dimmer and heater circuits<\/li>
      • Relaxation Oscillator<\/b>: R-C feedback from open-collector output creating a square wave oscillator for clock generation and tone generation<\/li>
      • Window Comparator<\/b>: Two comparators with shared output detecting when a voltage is within a defined range for over\/undervoltage protection<\/li>
      • Battery Monitor<\/b>: Comparing battery voltage against a Zener reference to drive a low-battery LED indicator in portable equipment<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Channels<\/th>Supply (V)<\/th>Package<\/th><\/tr>
        LM2903P<\/td>TI<\/td>2<\/td>2-36<\/td>DIP-8<\/td><\/tr>
        LM393DR<\/td>TI<\/td>2<\/td>2-36<\/td>SOIC-8<\/td><\/tr>
        LM393PT<\/td>ST<\/td>2<\/td>2-36<\/td>DIP-8<\/td><\/tr>
        TS393IPT<\/td>ST<\/td>2<\/td>2-36<\/td>DIP-8<\/td><\/tr>
        BA10339F<\/td>ROHM<\/td>4<\/td>2-36<\/td>DIP-14<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8489","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=8489"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8489\/revisions"}],"predecessor-version":[{"id":8490,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8489\/revisions\/8490"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8489"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}