{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS08N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS08N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS08N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS08N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series quad 2-input AND gate, SN74LS08N, 14-DIP (0.300\", 7.62mm) through-hole package, 4.75V~5.25V supply, 20ns propagation delay at 5V/15pF, 0°C~70°C operating temperature.","salesMarkdown":"## Active 74LS quad AND gate — BOM-fit note The SN74LS08N is an active-production Texas Instruments quad 2-input AND gate from the 74LS Schottky-clamped TTL family. Four independent gates in a single 14-pin DIP — each gate takes two inputs and drives a single output high only when both inputs are high. The 74LS series runs cooler than plain 74 TTL but still needs the 5 V rail held within 5 %. Operating temperature is 0 °C to 70 °C, so it is a commercial-grade part — fine for a benchtop or indoor panel, not for an engine bay or freezer. ## 20 ns propagation delay — timing and fan-out limits Max propagation delay is 20 ns at 5 V with a 15 pF load. That sets the data-rate ceiling — at 20 ns per gate, a two-level AND-OR chain adds 40 ns of combinatorial delay before the clock edge. For a 10 MHz clock (100 ns period), that is 40 % of the cycle eaten by logic, leaving little setup margin. Output drive is asymmetric: 400 µA sourcing high, 8 mA sinking low. The high-level drive is weak — fan-out to other LS loads is about 10 inputs per output. Driving a CMOS input or a long trace may need a pull-up or a buffer. The low-level sink is generous for TTL; it can drive a standard LED (with a series resistor) or a relay coil through a transistor base. Input logic thresholds are 0.8 V low and 2.0 V high — standard TTL levels. A 3.3 V CMOS output driving this gate needs a level translator or an open-drain pull-up to 5 V, because the 3.3 V high at 2.8 V barely clears the 2.0 V threshold and leaves no noise margin. ## 14-DIP through-hole — rework bench perspective The 14-pin DIP (0.300-inch row spacing) is about as rework-friendly as logic packages get. Pin pitch is 2.54 mm — you can probe every pin with a scope tip, and a standard IC extractor lifts it cleanly from a plated-through-hole board without lifting a pad. The 7.62 mm body width means no tight clearances to adjacent components. Through-hole mounting means the part survives repeated soldering cycles — desolder with a vacuum station or solder wick, reinsert, and reflow. No moisture sensitivity level to track, no hot-air profile to tune. The 14-PDIP supplier device package is the same mechanical outline as the standard 14-pin DIP; any socket or footprint that takes a 0.300-inch DIP works. ## Sourcing posture and compliance The 74LS series is a mature logic family — TI has produced it for decades. No official successor or second-source cross-reference is listed; the part is the original design-in choice for 5 V TTL systems. For new designs, the 74HC or 74LVC families offer lower power and wider supply range, but the 74LS remains the drop-in replacement for existing boards.","metaTitle":"SN74LS08N Texas Instruments 74LS Quad 2-Input AND Gate","metaDescription":"Active-production SN74LS08N quad 2-input AND gate from TI 74LS family. 20ns propagation delay at 5V, 15pF. Through-hole 14-DIP. ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"74LS","Package":"Tube","Logic Type":"AND 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":"400µA, 8mA","Max Propagation Delay @ V, Max CL":"20ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.84","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.84000","currency":"USD"},{"qty":10,"price":"$0.74200","currency":"USD"},{"qty":25,"price":"$0.69680","currency":"USD"},{"qty":100,"price":"$0.56850","currency":"USD"},{"qty":250,"price":"$0.52808","currency":"USD"},{"qty":500,"price":"$0.44944","currency":"USD"},{"qty":1000,"price":"$0.35955","currency":"USD"},{"qty":2500,"price":"$0.32584","currency":"USD"},{"qty":5000,"price":"$0.31800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6d635c0c263ba33b3fcc25aa4895c294.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the SN74LS08N and check availability?","answer":"The SN74LS08N is an active-production part from Texas Instruments. It is sourced to order against your BOM quantity through independent distribution."},{"question":"Can the SN74HC27APWR replace the SN74LS08N?","answer":"No — the SN74HC27APWR is a triple 3-input NOR gate from the 74HC series, not a quad 2-input AND gate. The logic function, pinout, and supply voltage (2-6 V for HC vs 4.75-5.25 V for LS) are different. They are not drop-in replacements. The SN74LS08N is the correct AND-gate part for a 5 V TTL system."},{"question":"What compliance documentation does Texas Instruments provide for the SN74LS08N?","answer":"The SN74LS08N is ROHS3 compliant per TI's lifecycle record. Standard TI documentation includes the datasheet, RoHS compliance certificate, and material declaration. No UL or IEC certification is listed for this logic IC — those standards apply to end equipment, not individual semiconductor packages."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS08N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS08N 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}}