{"product_id":"74hct125-quad-bus-buffer-ic-dip14-ttl-compatible-3-state","title":"74HCT125 Quad Bus Buffer IC DIP-14 – TTL-Compatible, 3-State, Non-Inverting","description":"\u003ch2\u003e74HCT125 Quad Bus Buffer IC – DIP-14, TTL-Compatible, 3-State\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e74HCT125\u003c\/strong\u003e is a quad (4-channel) non-inverting bus buffer with TTL-compatible inputs and individually controlled 3-state outputs – the TTL-input version of the 74HC125. Each of the four channels has its own independent output enable (̅O̅E̅) pin, allowing individual channel control. With TTL input thresholds (VIH = 2.0V), it's the correct choice for buffering 3.3V signals to drive 5V TTL systems, or for isolating bus segments with independent tri-state control.\u003c\/p\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 74HCT125 \/ SN74HCT125N \/ MC74HCT125AN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e DIP-14 (through-hole, 2.54mm pitch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 4 (independent, non-inverting)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 4.5V – 5.5V (5V operation)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Thresholds:\u003c\/strong\u003e TTL (VIH = 2.0V, VIL = 0.8V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Enable:\u003c\/strong\u003e Individual per channel (̅O̅E̅1–̅O̅E̅4, active LOW)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Drive Current:\u003c\/strong\u003e ±25mA per pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePropagation Delay:\u003c\/strong\u003e ~10ns (typical at 4.5V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e −40°C to +125°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e74HCT125 vs 74HC125 – Input Threshold Difference\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e74HC125:\u003c\/strong\u003e CMOS inputs (VIH = 0.7×VCC = 3.5V at 5V) – requires full CMOS swing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e74HCT125:\u003c\/strong\u003e TTL inputs (VIH = 2.0V) – accepts 3.3V logic signals at 5V supply\u003c\/li\u003e\n  \u003cli\u003eUse 74HCT125 when the input signal is 3.3V and the output needs to be 5V-compatible\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3.3V → 5V level shifting:\u003c\/strong\u003e Buffer 3.3V microcontroller outputs to drive 5V TTL peripherals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBus isolation:\u003c\/strong\u003e Individually tri-state 4 bus lines with independent control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal buffering:\u003c\/strong\u003e Drive multiple loads from a single signal source\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino to 5V TTL:\u003c\/strong\u003e Interface Arduino (5V) outputs with TTL-threshold devices\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiplexed bus:\u003c\/strong\u003e Selectively connect\/disconnect bus segments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 74HCT125 DIP-14 quad bus buffer IC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFour independently controlled TTL-compatible buffers with 3-state outputs – the 74HCT125 is the go-to IC for 3.3V↔5V level shifting and bus isolation with individual channel control.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45674451894507,"sku":"","price":5.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/74HCT125-4-Channel-Buffer-with-3-State-outputs.jpg?v=1723007479","url":"https:\/\/keszoox.com\/products\/74hct125-quad-bus-buffer-ic-dip14-ttl-compatible-3-state","provider":"Keszoox","version":"1.0","type":"link"}