{"product_id":"cd4043-quad-nor-r-s-latch-with-3-state-outputs-cmos-logic","title":"CD4043 – Quad NOR R-S Latch with 3-State Outputs (CMOS Logic)","description":"\u003cp data-path-to-node=\"4\"\u003eWhen your digital circuit needs a reliable way to capture, hold, and selectively transmit brief logic pulses or button presses, the CD4043 is the perfect solution. This integrated circuit contains four independent Reset-Set (R-S) latches constructed from cross-coupled NOR gates. When you apply a high signal to a latch's Set pin, its corresponding output goes high and stays high even after the Set signal is removed. Applying a high signal to the Reset pin forces the output back low. This fundamental memory action makes it ideal for switch debouncing, alarm event capture, and state retention in automated control systems.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eWhat sets the CD4043 apart from basic logic gate arrays is its integrated Tri-State (or 3-state) output control. All four latches are connected to a common Enable pin. When the Enable pin is high, the latched memory states are passed directly to the output pins. However, when the Enable pin is pulled low, the outputs internally disconnect and enter a \"high-impedance\" state, essentially acting as if they are physically unplugged. This specialized feature allows you to safely connect the outputs of multiple CD4043 chips directly to a shared microcontroller data bus without causing short circuits or signal collisions.\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\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eQuad Memory Storage:\u003c\/b\u003e Features four completely independent Set-Reset latches in a single package, allowing you to store four separate bits of hardware logic.\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\"\u003eTri-State Outputs:\u003c\/b\u003e The common Enable pin allows the chip to completely detach its outputs from the rest of your circuit, enabling safe connections to shared data lines and microcontrollers.\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\"\u003eWide Voltage Compatibility:\u003c\/b\u003e True to the CD4000 series heritage, it operates flawlessly across a wide supply range from 3 Volts to 15 Volts DC.\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\"\u003eHigh Noise Immunity:\u003c\/b\u003e CMOS construction provides excellent resistance to electrical interference, making it highly reliable in industrial or electrically noisy environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,4,0\"\u003e\u003cb data-path-to-node=\"7,4,0\" data-index-in-node=\"0\"\u003eActive-High Logic:\u003c\/b\u003e Designed specifically for positive logic systems; both the Set and Reset actions are triggered by high voltage signals.\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\"\u003eHardware Switch Debouncing:\u003c\/b\u003e The classic solution for cleaning up the noisy, bouncy electrical signals generated by mechanical pushbuttons and toggle switches before they reach a microcontroller.\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\"\u003eAlarm and Fault Logging:\u003c\/b\u003e Excellent for capturing brief, fleeting fault signals from industrial sensors and holding them steady until a master controller can read and clear the latch.\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\"\u003eShared Bus Architectures:\u003c\/b\u003e Ideal for building custom memory registers or multi-sensor arrays that need to take turns transmitting data down a single set of wires.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\"\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eBasic State Machines:\u003c\/b\u003e Useful for creating dedicated hardware logic sequences that do not require the overhead or power consumption of a full programmable microcontroller.\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\"\u003eLogic Family:\u003c\/b\u003e CD4000 Series CMOS\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\"\u003eFunction:\u003c\/b\u003e Quad R-S Latch (NOR Gate Configuration)\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\"\u003eOutput Type:\u003c\/b\u003e 3-State (High, Low, and High-Impedance)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,3,0\"\u003e\u003cb data-path-to-node=\"11,3,0\" data-index-in-node=\"0\"\u003eNumber of Latches:\u003c\/b\u003e 4 Independent Channels\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\"\u003eOperating Voltage Range:\u003c\/b\u003e 3.0 Volts to 15.0 Volts DC\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 16-Pin Dual Inline Package (DIP)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42867770490951,"sku":null,"price":0.0,"currency_code":"KES","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/234-CD4043-Quad-NOR-R-S-Latch-Tri-state-1.webp?v=1781154536","url":"https:\/\/www.ktechnics.com\/products\/cd4043-quad-nor-r-s-latch-with-3-state-outputs-cmos-logic","provider":"K-TECHNICS","version":"1.0","type":"link"}