{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS03N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS03N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS03N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS03N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series, SN74LS03N, Quad 2-Input NAND Gate with Open Collector outputs, Through Hole, 14-DIP (0.300\", 7.62mm), 4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature.","salesMarkdown":"## Package and mounting The Texas Instruments SN74LS03N packs four independent 2-input NAND gates in a single 14-pin DIP, each with an open-collector output. Open collector means the output transistor pulls low to ground but floats high — the pull-up resistor is external. That makes this gate useful for wired-OR connections, level translation (e.g., 5 V logic to a 3.3 V rail via the pull-up voltage), and driving loads like LEDs or relay coils where the sink current handles the work. Supply range is 4.75 V to 5.25 V, squarely a 5 V TTL part. Input low threshold is 0.8 V, high threshold is 2 V — standard 74LS levels. The operating temperature window is 0°C to 70°C, commercial grade, so this part belongs in office equipment, appliances, and indoor PCBs where ambient stays controlled. ## Propagation delay and drive — sizing the pull-up and the bus Maximum propagation delay is 32 ns at 5 V with a 15 pF load. That is typical for the 74LS family — adequate for slow address decoding, status latching, or glue logic running below 10 MHz. For comparison, the 74F family (e.g., SN74F00DR) delivers 5 ns at 5 V / 50 pF, but that part is surface-mount and lacks open-collector outputs. If your board needs the speed, the 74F is a different footprint and logic style; the 74LS03N is the right choice when open-collector wired-OR or level shifting is the requirement, not raw clock distribution. Output drive is asymmetric: 250 µA sourced high (since the open-collector transistor is off), and 16 mA sunk low. The sink current is the real spec — size the external pull-up resistor so the output low voltage stays within the logic-low threshold of the receiving gate. A 1 kΩ pull-up to 5 V gives about 5 mA sink current, well within the 16 mA limit, and keeps the rise time reasonable for the 32 ns propagation delay budget. ## Lifecycle and sourcing — active, no LTB pressure This is a standard catalog item for Texas Instruments' 74LS series, widely stocked across franchised and independent distribution. For a BOM line that needs a through-hole 5 V open-collector NAND, this part is a straightforward fit with no supply-chain urgency. ROHS3 compliant, so it passes the current environmental directives. The 14-DIP package is through-hole, which means hand-assembly or wave-solder friendly — no reflow profile concerns, no MSL bake requirements out of the tube.","metaTitle":"SN74LS03N 74LS Quad 2-Input NAND Gate, Open Collector","metaDescription":"SN74LS03N — TI 74LS quad 2-input NAND gate with open-collector outputs. 4.75V–5.25V supply, 32ns propagation delay at 5V/15pF. Active, through-hole 14-DIP.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74LS","Package":"Tube","Features":"Open Collector","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 (TA)","Input Logic Level - Low":"0.8V","Supplier Device Package":"14-PDIP","Input Logic Level - High":"2V","Current - Output High, Low":"250µA, 16mA","Max Propagation Delay @ V, Max CL":"32ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.20000","currency":"USD"},{"qty":10,"price":"$1.07300","currency":"USD"},{"qty":25,"price":"$1.01800","currency":"USD"},{"qty":100,"price":"$0.83620","currency":"USD"},{"qty":250,"price":"$0.78168","currency":"USD"},{"qty":500,"price":"$0.69080","currency":"USD"},{"qty":1000,"price":"$0.54537","currency":"USD"},{"qty":2500,"price":"$0.51450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2da7e5693437f67840628bbcf6df1ee0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the equivalent or replacement parts for SN74LS03N if it is unavailable?","answer":"The SN74F00DR is a quad 2-input NAND but it is surface-mount (SOIC), has push-pull outputs (not open-collector), and runs at 5 ns propagation delay — a different footprint and logic style. The SN74HC20N is a dual 4-input NAND in through-hole DIP with HC logic levels and wider temperature range, but it has more inputs per gate and no open-collector outputs. Neither is a direct drop-in; the SN74LS03N is the correct part when open-collector outputs and 74LS thresholds are required."},{"question":"What is the logic function and number of gates in SN74LS03N?","answer":"The SN74LS03N contains four independent 2-input NAND gates with open-collector outputs. Each gate performs the NAND logic function: output low only when both inputs are high."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS03N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS03N when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}