{"product_id":"74hc14d-sn74hc14dr-hex-schmitt-trigger-inverter-sop14-2-6v-5pack","title":"74HC14D Hex Schmitt Trigger Inverter — SOP-14 SMD, 2–6V, -40°C to 125°C (5-Pack)","description":"\u003ch2\u003e74HC14D \/ SN74HC14DR Hex Schmitt Trigger Inverter — SOP-14 SMD, 2–6V (5-Pack)\u003c\/h2\u003e\u003cp\u003eThe 74HC14D (SN74HC14DR) contains six independent Schmitt trigger inverters in a SOP-14 SMD package. Unlike standard inverters, each gate has hysteresis (typically 0.9V at 5V supply) that makes the output switching threshold different for rising and falling inputs. This hysteresis eliminates false triggering from slow-rising signals, noise, and contact bounce, making it the standard IC for signal conditioning, button debouncing, RC oscillators, and noise-immune logic interfacing.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOP-14 (SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGates\u003c\/td\u003e\n\u003ctd\u003e6× Schmitt trigger inverter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Family\u003c\/td\u003e\n\u003ctd\u003e74HC (High-Speed CMOS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2V – 6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHysteresis (VCC=5V)\u003c\/td\u003e\n\u003ctd\u003e~0.9V typ. (VT+ ≈ 2.9V, VT− ≈ 2.0V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Drive Current\u003c\/td\u003e\n\u003ctd\u003e±25mA per output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePropagation Delay\u003c\/td\u003e\n\u003ctd\u003e~13ns (VCC=5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eSchmitt Trigger vs Standard Inverter\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSchmitt Trigger (74HC14)\u003c\/th\u003e\n\u003cth\u003eStandard Inverter (74HC04)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching threshold\u003c\/td\u003e\n\u003ctd\u003eHysteresis (VT+ ≠ VT−)\u003c\/td\u003e\n\u003ctd\u003eSingle threshold (~50% VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise immunity\u003c\/td\u003e\n\u003ctd\u003eHigh (rejects noise within hysteresis band)\u003c\/td\u003e\n\u003ctd\u003eLow (any noise near threshold causes glitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlow signal handling\u003c\/td\u003e\n\u003ctd\u003eClean output from slow-rising input\u003c\/td\u003e\n\u003ctd\u003eMultiple transitions on slow input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eNoisy signals, RC oscillator, debounce\u003c\/td\u003e\n\u003ctd\u003eClean digital signals only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose 74HC14D?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSchmitt trigger hysteresis\u003c\/strong\u003e — ~0.9V hysteresis at 5V eliminates false triggering from noise and slow signals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6 inverters per IC\u003c\/strong\u003e — six independent Schmitt trigger inverters in one SOP-14 package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRC oscillator\u003c\/strong\u003e — one inverter + R + C forms a simple square wave oscillator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButton debouncing\u003c\/strong\u003e — RC + Schmitt trigger eliminates contact bounce without software debounce\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSOP-14 SMD\u003c\/strong\u003e — compact footprint for PCB designs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With \/ Common Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRC oscillator\u003c\/strong\u003e: One 74HC14 inverter + R (10kΩ) + C (10nF) = ~10kHz square wave oscillator (f ≈ 1\/(1.2×R×C))\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButton debounce\u003c\/strong\u003e: RC filter (10kΩ + 100nF) on button input, then through 74HC14 — clean digital output without bounce\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal conditioning\u003c\/strong\u003e: Convert slow-rising analog-like signals (thermistor, photodiode) to clean digital edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal oscillator buffer\u003c\/strong\u003e: Buffer crystal oscillator output for distribution to multiple logic circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise-immune input\u003c\/strong\u003e: Interface noisy industrial sensors to clean CMOS logic\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I build an RC oscillator with 74HC14?\u003c\/strong\u003e\u003cbr\u003eA: Connect a resistor R from the output of one inverter back to its input. Connect a capacitor C from the input to GND. The oscillation frequency is approximately f = 1 \/ (1.2 × R × C). For R=10kΩ, C=10nF: f = 1 \/ (1.2 × 10000 × 0.00000001) = ~8.3kHz. Use a second inverter to buffer the output for a clean square wave drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the difference between 74HC14 (SOP-14) and 74HC14N (DIP-14)?\u003c\/strong\u003e\u003cbr\u003eA: 74HC14D is the SOP-14 SMD package (surface mount). 74HC14N is the DIP-14 through-hole package. Both have identical electrical specifications — the only difference is the physical package. Use DIP-14 for breadboard prototyping; use SOP-14 for PCB designs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can 74HC14 debounce a mechanical switch without software?\u003c\/strong\u003e\u003cbr\u003eA: Yes — connect a 10kΩ pull-up resistor from VCC to the switch input, and a 100nF capacitor from the switch input to GND. Connect the switch between input and GND. Feed the RC-filtered signal into a 74HC14 inverter. The RC time constant (10kΩ × 100nF = 1ms) filters bounce pulses, and the Schmitt trigger provides a clean digital output. The output is inverted — add a second inverter stage if non-inverted output is needed.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× 74HC14D \/ SN74HC14DR Hex Schmitt Trigger Inverter IC (SOP-14)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991470002411,"sku":"\u003cnone\u003e","price":8.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/74hc14d-sop14-hex-schmitt-trigger-smd.webp?v=1761634322","url":"https:\/\/keszoox.com\/products\/74hc14d-sn74hc14dr-hex-schmitt-trigger-inverter-sop14-2-6v-5pack","provider":"Keszoox","version":"1.0","type":"link"}