{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC266DR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC266DR","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC266DR","factsUrl":"https://icboms.com/api/mcp/products/SN74HC266DR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, XNOR (Exclusive NOR) gate, SN74HC266DR, 4 circuits, 2 inputs, open drain outputs, 14-SOIC package, Tape & Reel.","salesMarkdown":"## What the open-drain XNOR buys you on the bench The SN74HC266DR is a quad 2-input XNOR gate with open-drain outputs — meaning each output can be pulled low by the gate but relies on an external pull-up resistor to go high. This lets you wire multiple outputs together on a common bus line (wired-OR) without contention, which is handy for shared interrupt lines or address decoding where any one gate going low should assert the line. Quiescent current maxes out at 2 µA — negligible for battery-powered gear. ## Timing and drive — what to expect when swapping Propagation delay is 23 ns max at 6V with a 50 pF load. That puts the practical toggle rate around 20-30 MHz depending on the pull-up resistor value and trace capacitance — fast enough for most glue logic but not for high-speed clock distribution. The high-level output current is listed as '-, 5.2mA' — open drain means it only sinks current on the low side. The 5.2 mA sink capability is enough to drive a standard TTL input or an LED with a current-limiting resistor, but don't expect to drive a relay coil directly. ## Package and board-fit Housed in a 14-SOIC (0.154-inch wide, 3.90 mm body width) — the standard narrow SOIC footprint. Surface-mount, so it's a hot-air or reflow job; not a field-swap candidate unless you've got a hot-air station in the kit.","metaTitle":"SN74HC266DR TI 74HC XNOR Gate, Open Drain, 14-SOIC","metaDescription":"Texas Instruments SN74HC266DR quad 2-input XNOR gate with open-drain outputs. Active production, ROHS3, 2V-6V supply, -40°C to 85°C. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Series":"74HC","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Open Drain","Logic Type":"XNOR (Exclusive NOR)","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Inputs":"2","Voltage - Supply":"2V ~ 6V","Number of Circuits":"4","Operating Temperature":"-40°C ~ 85°C","Input Logic Level - Low":"0.5V ~ 1.8V","Supplier Device Package":"14-SOIC","Input Logic Level - High":"1.5V ~ 4.2V","Current - Quiescent (Max)":"2 µA","Current - Output High, Low":"-, 5.2mA","Max Propagation Delay @ V, Max CL":"23ns @ 6V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.63","priceTiers":[{"qty":1,"price":"$0.63000","currency":"USD"},{"qty":10,"price":"$0.54100","currency":"USD"},{"qty":25,"price":"$0.50440","currency":"USD"},{"qty":100,"price":"$0.40360","currency":"USD"},{"qty":250,"price":"$0.37480","currency":"USD"},{"qty":500,"price":"$0.31716","currency":"USD"},{"qty":1000,"price":"$0.24507","currency":"USD"},{"qty":2500,"price":"$0.22345","currency":"USD"},{"qty":5000,"price":"$0.20903","currency":"USD"},{"qty":12500,"price":"$0.20400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1186a7c92bf18117b9962a7bd736e5d1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC266DR/alternatives.json"},"ai":{"faq":[{"question":"Will SN74HC266DR drop into a board designed for SN74LV08ADR?","answer":"Not without a board spin. The SN74LV08ADR is an AND gate in the 74LV series, while the SN74HC266DR is an XNOR gate in the 74HC series. They share the same 14-SOIC footprint and 2V-6V supply range, but the logic function is different — the LV08 gives a high output when both inputs are high; the HC266 gives a high output when inputs match. The open-drain output on the HC266 also requires an external pull-up resistor that the LV08's push-pull output does not."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC266DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC266DR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}