{"product_id":"lm393-dual-differential-comparator-ic","title":"LM393 Dual Differential Comparator IC","description":"\u003cp data-path-to-node=\"4\"\u003eWhile microcontrollers are excellent at reading digital ones and zeros, the physical world is entirely analog. When you need a circuit to take a fluctuating analog signal like the fading light on a photoresistor or the rising heat of a thermistor and instantly convert it into a definitive \"ON\" or \"OFF\" digital trigger, the LM393 is the industry standard tool for the job.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\" id=\"p-rc_e2d66674f26ce1f7-592\"\u003e\u003cspan class=\"citation-499 citation-end-499\"\u003eThis integrated circuit contains two completely independent differential voltage comparators inside a single 8-pin package.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Each comparator actively monitors two input voltages: a reference voltage (your set threshold) and a variable voltage (from your sensor). If the sensor voltage rises above your threshold, the output pin instantly changes state. What makes the LM393 incredibly popular among circuit designers is its \"open-collector\" output stage. Instead of forcing a specific output voltage, it acts as an electronic switch to ground. By adding a simple pull-up resistor to the output, you can have this chip trigger a 3.3-Volt Raspberry Pi, a 5-Volt Arduino, or a 12-Volt industrial relay array, making it the ultimate logic-level translator. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003eKey Features \u0026amp; Functional Advantages\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\" id=\"p-rc_e2d66674f26ce1f7-593\"\u003e\u003cspan class=\"citation-498\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-498\"\u003eDual Independent Channels:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-498 citation-end-498\"\u003e Contains two separate comparators in one tiny package, allowing you to monitor two different sensors or create complex upper-and-lower \"window\" limits.\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eOpen-Collector Output:\u003c\/b\u003e The output does not supply its own voltage; instead, it pulls down to ground. This allows you to safely interface the comparator with microcontrollers running at completely different logic levels using a simple pull-up resistor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\"\u003eMassive Voltage Range:\u003c\/b\u003e Operates reliably on a single supply ranging from a mere 2 Volts all the way up to 36 Volts DC, making it equally suited for coin-cell battery projects and heavy industrial machinery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,3,0\"\u003e\u003cb data-path-to-node=\"7,3,0\" data-index-in-node=\"0\"\u003eLow Power Consumption:\u003c\/b\u003e Draws a very small amount of baseline current, ensuring it won't drain your batteries while waiting for a sensor threshold to be crossed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,4,0\" id=\"p-rc_e2d66674f26ce1f7-594\"\u003e\u003cspan class=\"citation-497\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"7,4,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-497\"\u003eHigh Precision:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-497 citation-end-497\"\u003e Features a low input offset voltage, allowing the chip to accurately detect very small voltage differences between its inputs.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003ePerfect For\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eAnalog Sensor Modules:\u003c\/b\u003e The exact chip found on almost all standard hobbyist sensor breakout boards (like sound sensors, line tracking modules, and light detectors) to provide a clean digital output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eWindow Comparators:\u003c\/b\u003e Wiring the two internal channels together to monitor whether a battery voltage is safely sitting between an upper maximum limit and a lower minimum limit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,2,0\"\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eLogic Level Shifting:\u003c\/b\u003e Safely triggering low-voltage digital processors using high-voltage analog sensor signals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\" id=\"p-rc_e2d66674f26ce1f7-595\"\u003e\u003cspan class=\"citation-496\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-496\"\u003eOvervoltage Alarms:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-496 citation-end-496\"\u003e Instantly triggering a warning buzzer or hardware shutdown when a power supply exceeds a safe preset limit, acting much faster than a microcontroller could.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eTechnical Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-path-to-node=\"11,0,0\" data-index-in-node=\"0\"\u003eDevice Type:\u003c\/b\u003e Dual Differential Voltage Comparator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-path-to-node=\"11,1,0\" data-index-in-node=\"0\"\u003eNumber of Channels:\u003c\/b\u003e 2 Independent Comparators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,2,0\"\u003e\u003cb data-path-to-node=\"11,2,0\" data-index-in-node=\"0\"\u003eOperating Voltage Range:\u003c\/b\u003e 2.0 Volts to 36.0 Volts DC (Single Supply)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,3,0\" id=\"p-rc_e2d66674f26ce1f7-596\"\u003e\u003cb data-path-to-node=\"11,3,0\" data-index-in-node=\"0\"\u003eOutput Type:\u003c\/b\u003e\u003cspan class=\"citation-495 citation-end-495\"\u003e Open-Collector (Requires external Pull-Up Resistor)\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,4,0\"\u003e\u003cb data-path-to-node=\"11,4,0\" data-index-in-node=\"0\"\u003eMaximum Output Sink Current:\u003c\/b\u003e Typically around 16 milliamps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,5,0\"\u003e\u003cb data-path-to-node=\"11,5,0\" data-index-in-node=\"0\"\u003ePackage Type:\u003c\/b\u003e 8-Pin Dual Inline Package (DIP-8) or Surface Mount (SOIC-8) depending on specific batch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42867776716871,"sku":null,"price":0.0,"currency_code":"KES","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/lm393.webp?v=1781155160","url":"https:\/\/www.ktechnics.com\/products\/lm393-dual-differential-comparator-ic","provider":"K-TECHNICS","version":"1.0","type":"link"}