{"product_id":"74hc125-quad-bus-buffer-with-3-state-outputs-14-pin-dip-package","title":"74HC125 (Quad Bus Buffer with 3-State Outputs - 14-Pin DIP Package)","description":"\u003cp data-path-to-node=\"5\"\u003eWhen multiple sensors, microcontrollers, or memory chips need to share the exact same communication wire (like an SPI bus or an 8-bit computer data bus), you face a major electrical hazard. If two chips try to transmit data on the same wire at the same time, it creates a short circuit that can destroy your components. The \u003cb data-path-to-node=\"5\" data-index-in-node=\"324\"\u003e74HC125\u003c\/b\u003e is the standard silicon solution to this problem. It is a quad bus buffer featuring four independent, non-inverting line drivers.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe magic of the 74HC125 lies in its \u003cb data-path-to-node=\"6\" data-index-in-node=\"37\"\u003e3-State (Tri-State) Outputs\u003c\/b\u003e. Each of the four buffers has its own dedicated Output Enable (OE) pin. When this enable pin is pulled Low, the buffer acts normally, passing data from its input to its output and boosting the signal strength. However, when the enable pin is pulled High, the buffer physically disconnects its output from the circuit, entering a \"High-Impedance\" state. This effectively makes the chip invisible to the rest of the data bus, allowing other devices to transmit safely without interference.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eKey Features \u0026amp; Functional Advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eFour Independent Buffers:\u003c\/b\u003e Contains four separate line drivers in a single 14-pin package, perfectly sized for isolating the four standard lines of an SPI connection (MOSI, MISO, SCK, CS).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eTri-State Outputs:\u003c\/b\u003e Safely isolates your components by providing three distinct output states: High, Low, and High-Impedance (Disconnected).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eActive-Low Output Enable:\u003c\/b\u003e Each buffer is controlled by an active-low enable pin, making it incredibly easy to control via standard microcontroller chip-select logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eSignal Boosting:\u003c\/b\u003e Acts as an excellent logic buffer to take a weak digital signal from a distant sensor and drive it strongly down a long wire to your main processor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eWide Operating Voltage:\u003c\/b\u003e Features High-Speed CMOS (HC) architecture, operating flawlessly across a 2.0V to 6.0V range for compatibility with both 3.3V and 5V logic systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003ePerfect For:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eSPI Bus Multiplexing:\u003c\/b\u003e The mandatory hardware for allowing multiple SPI devices (like SD card modules and LCD screens) that don't play nicely together to share the same MISO line safely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eLogic Level Shifting:\u003c\/b\u003e Frequently used in unidirectional level-shifting circuits to safely step 5V logic signals down to 3.3V to protect delicate Raspberry Pi or ESP32 inputs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eHomebrew 8-Bit Computers:\u003c\/b\u003e An essential component for connecting discrete registers and arithmetic units to the shared main data bus in DIY CPU builds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eSignal Isolation:\u003c\/b\u003e Excellent for physically isolating a programmer (like an FTDI or ICSP) from the rest of the circuit while flashing a microcontroller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eLogic Family:\u003c\/b\u003e 74HC (High-Speed CMOS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eLogic Function:\u003c\/b\u003e Bus Buffer \/ Line Driver (Non-Inverting)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eNumber of Buffers:\u003c\/b\u003e 4 (Quad)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eOutput Type:\u003c\/b\u003e 3-State (Tri-State \/ High-Impedance capable)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,4,0\"\u003e\u003cb data-path-to-node=\"12,4,0\" data-index-in-node=\"0\"\u003eOutput Enable Logic:\u003c\/b\u003e Active-LOW\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,5,0\"\u003e\u003cb data-path-to-node=\"12,5,0\" data-index-in-node=\"0\"\u003eOperating Supply Voltage (Vcc):\u003c\/b\u003e 2.0V to 6.0V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,6,0\"\u003e\u003cb data-path-to-node=\"12,6,0\" data-index-in-node=\"0\"\u003eMaximum Output Current:\u003c\/b\u003e ~35 mA (per pin)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,7,0\"\u003e\u003cb data-path-to-node=\"12,7,0\" data-index-in-node=\"0\"\u003ePackage \/ Case:\u003c\/b\u003e 14-DIP (0.300\", 7.62mm width)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,8,0\"\u003e\u003cb data-path-to-node=\"12,8,0\" data-index-in-node=\"0\"\u003eMounting Type:\u003c\/b\u003e Through-Hole (PTH)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42865707810887,"sku":null,"price":50.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/s-l1600-1-1.webp?v=1781082955","url":"https:\/\/www.ktechnics.com\/products\/74hc125-quad-bus-buffer-with-3-state-outputs-14-pin-dip-package","provider":"K-TECHNICS","version":"1.0","type":"link"}