{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS37N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS37N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS37N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS37N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series quad 2-input NAND gate, SN74LS37N, 14-DIP through-hole package, 4.75V-5.25V supply, 24ns propagation delay at 5V 45pF, 1.2mA/24mA output drive.","salesMarkdown":"## Quad 2-input NAND in a 14-pin DIP — the workhorse logic gate The SN74LS37N is a Texas Instruments 74LS-series quad 2-input NAND gate in a 14-DIP through-hole package. Four independent NAND circuits share a common 4.75V to 5.25V supply rail, each with two inputs. The 24ns max propagation delay at 5V into 45pF sets the timing budget for a 5V logic bus running at moderate clock rates — each gate's output settles within one 41 MHz clock period. ## Output drive and what it means for fan-out The output stage sources 1.2 mA and sinks 24 mA. The 24 mA sink current is the stronger half — it drives up to 10 standard LS-TTL loads (each loading the output with 2.4 mA in the low state) without exceeding the rated output voltage. The source side is lighter: 1.2 mA drives about 4 LS-TTL loads. For a bus with mixed logic families, the fan-out calculation should use the sink current as the limiting factor. Input logic thresholds are 0.8V for a low and 2V for a high, standard for the 74LS family. The 0.8V low threshold provides 0.4V of noise margin below a typical 1.2V output low, adequate for backplane or PCB traces in a controlled 5V environment. Not specified for extended industrial or automotive ambient; the 74LS family's bipolar process draws more quiescent current than CMOS alternatives, so thermal rise in a densely populated board should be checked against the 70°C ceiling.","metaTitle":"SN74LS37N TI 74LS NAND Gate, 4-ch 2-in, 14-DIP, 24ns","metaDescription":"SN74LS37N Texas Instruments 74LS quad 2-input NAND gate. 14-DIP through-hole, 4.75-5.25V supply, 24ns propagation delay. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Series":"74LS","Package":"Tube","Logic Type":"NAND Gate","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Inputs":"2","Voltage - Supply":"4.75V ~ 5.25V","Number of Circuits":"4","Operating Temperature":"0°C ~ 70°C","Input Logic Level - Low":"0.8V","Supplier Device Package":"14-PDIP","Input Logic Level - High":"2V","Current - Output High, Low":"1.2mA, 24mA","Max Propagation Delay @ V, Max CL":"24ns @ 5V, 45pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.54","priceTiers":[{"qty":1,"price":"$1.54000","currency":"USD"},{"qty":10,"price":"$1.37600","currency":"USD"},{"qty":25,"price":"$1.30600","currency":"USD"},{"qty":100,"price":"$1.07270","currency":"USD"},{"qty":250,"price":"$1.00276","currency":"USD"},{"qty":500,"price":"$0.88616","currency":"USD"},{"qty":1000,"price":"$0.69960","currency":"USD"},{"qty":2500,"price":"$0.66000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/99da94fb0dcf6e2bca9f3fb1c9605181.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS37N/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for SN74LS37N?","answer":"Pricing and stock levels are confirmed at quote time. Submit an RFQ against your BOM quantity; the sourcing desk will return current availability and per-unit pricing from authorized channels."},{"question":"Will SN74LS37N drop into a board specified for SN74F00DR?","answer":"No — the SN74F00DR is a surface-mount SOIC package, while the SN74LS37N is a 14-DIP through-hole. The logic function is the same (quad 2-input NAND), but the footprint and mounting are incompatible without a board spin. The 74F00 also runs at 5ns propagation delay vs 24ns, which may affect timing closure if the original design relied on the faster edge."},{"question":"What compliance documentation does Texas Instruments provide for SN74LS37N?","answer":"The SN74LS37N is ROHS3 compliant. Standard Texas Instruments documentation includes the datasheet, RoHS compliance certificate, and material declaration. No UL or IEC certification is listed for this part."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS37N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS37N 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}}