{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC126N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC126N","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC126N","factsUrl":"https://icboms.com/api/mcp/products/SN74HC126N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, Buffer, Non-Inverting, 3-State, Through Hole, 14-DIP (0.300\", 7.62mm), 2V ~ 6V, -40°C ~ 85°C.","salesMarkdown":"## What this quad buffer does on the board The Texas Instruments SN74HC126N packs four independent non-inverting buffers with 3-state outputs into a single 14-pin DIP. Each buffer passes the input to the output when its associated output-enable (OE) pin is high; when OE is low, the output goes high-impedance, letting multiple devices share a common bus line. The 74HC logic family runs on a 2V to 6V supply, so it mates directly with 3.3V or 5V logic without level translation. The through-hole 14-DIP package (0.300\" body width) is a breadboard and prototype staple — easy to socket, easy to hand-solder, and simple to swap during debug. ## 3-state outputs and bus interfacing The 3-state output is the feature that makes this part a bus buffer rather than a simple line driver. When OE is low, the output presents a high-impedance load to the bus — typically a few microamps of leakage — so another device can drive the same trace without contention. That is the standard arrangement for a shared data bus in a microcontroller system or a parallel interface between cards. The output current rating of 7.8 mA source and sink is typical for 74HC; it drives a standard TTL load or a few CMOS gate inputs, but not a long cable or a high-capacitance backplane trace without external buffering.","metaTitle":"SN74HC126N Buffer, Non-Inverting, 3-State, 14-DIP, 2V-6V","metaDescription":"TI SN74HC126N quad non-inverting buffer with 3-state outputs. 74HC logic, 2V-6V supply, -40 to 85°C. Through-hole 14-DIP. Active product, sourced to order.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Series":"74HC","Package":"Tube","Logic Type":"Buffer, Non-Inverting","Output Type":"3-State","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"4","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"14-PDIP","Current - Output High, Low":"7.8mA, 7.8mA","Number of Bits per Element":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.65","priceTiers":[{"qty":1,"price":"$0.65000","currency":"USD"},{"qty":10,"price":"$0.57400","currency":"USD"},{"qty":25,"price":"$0.53880","currency":"USD"},{"qty":100,"price":"$0.43980","currency":"USD"},{"qty":250,"price":"$0.40852","currency":"USD"},{"qty":500,"price":"$0.34768","currency":"USD"},{"qty":1000,"price":"$0.27814","currency":"USD"},{"qty":2500,"price":"$0.25207","currency":"USD"},{"qty":5000,"price":"$0.24600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/06c891c6ce1bfe1814328a27f4c9de01.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC126N/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between SN74HC126N and SN74HC125N?","answer":"Both are quad non-inverting buffers with 3-state outputs in a 14-DIP package. The difference is the output-enable polarity: the SN74HC126N enables outputs when OE is high; the SN74HC125N enables when OE is low. Everything else — supply range, output drive, temperature grade — is identical."},{"question":"Can SN74HC126N be used at 3.3V?","answer":"Yes, the supply range is 2V to 6V, so 3.3V is well within the operating window. At 3.3V the propagation delay and output drive will be slightly lower than at 5V, but the part functions correctly and is commonly used in 3.3V logic systems."},{"question":"What are the alternative parts to SN74HC126N?","answer":"Functional alternatives include the SN74HC125N (complementary enable polarity) and the SN74LS645-1N (8-bit transceiver, different pinout and logic family). For a direct drop-in replacement, stick with the SN74HC126N or the SN74HC125N if you invert the enable logic."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC126N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC126N 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}}