{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS378N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS378N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS378N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS378N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series D-Type flip-flop, SN74LS378N, 40 MHz clock frequency, 6-bit, non-inverted output, positive edge triggered, 16-DIP through-hole package, tube.","salesMarkdown":"## 6-bit D-type register for bus-interface and control logic The SN74LS378N is a 6-bit D-type flip-flop from Texas Instruments' 74LS low-power Schottky family, designed for storage and transfer of 6-bit data words in synchronous digital systems. Positive-edge triggered with non-inverted outputs, it captures the data present at the D inputs on each rising clock edge and holds it until the next clock transition, making it suitable for register, buffer, and control-latch applications. The 40 MHz maximum clock frequency and 27 ns propagation delay at 5 V, 15 pF load set the timing budget for data setup and hold — in a 5 V system clocked at 20 MHz, the 27 ns delay leaves roughly 23 ns of the 50 ns cycle for the next stage to settle. ## Supply rails and output drive Output drive capability: 400 µA source, 8 mA sink. The 8 mA sink handles standard TTL fan-out of 10 LS loads, but the 400 µA source limits direct drive of LED indicators or high-impedance loads without a buffer. Quiescent supply current is 22 mA — typical for a 6-bit 74LS register, this is the standing current draw when the clock is static; dynamic current scales with clock frequency and output load. ## Package and board integration Housed in a 16-pin DIP with 0.300-inch (7.62 mm) row spacing and through-hole mounting, the SN74LS378N is a legacy through-hole part that mates with standard DIP sockets or solders directly into a PCB. ## Production status and compliance ROHS3 compliant, lead-free per EU Directive 2011/65/EU.","metaTitle":"SN74LS378N D-Type Flip-Flop, 40 MHz, 16-DIP, Active","metaDescription":"Texas Instruments SN74LS378N D-Type flip-flop, 40 MHz clock, 27ns propagation delay, 16-DIP through-hole, active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Type":"D-Type","Series":"74LS","Package":"Tube","Function":"Standard","Output Type":"Non-Inverted","Trigger Type":"Positive Edge","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","Clock Frequency":"40 MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"1","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"16-PDIP","Current - Quiescent (Iq)":"22 mA","Current - Output High, Low":"400µA, 8mA","Number of Bits per Element":"6","Max Propagation Delay @ V, Max CL":"27ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.15","priceTiers":[{"qty":1,"price":"$2.15000","currency":"USD"},{"qty":10,"price":"$1.93000","currency":"USD"},{"qty":25,"price":"$1.82040","currency":"USD"},{"qty":100,"price":"$1.55110","currency":"USD"},{"qty":250,"price":"$1.45644","currency":"USD"},{"qty":500,"price":"$1.27438","currency":"USD"},{"qty":1000,"price":"$1.05592","currency":"USD"},{"qty":2500,"price":"$1.03050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3ad4db1c2cb8f7d36d6e271c4136b996.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS378N/alternatives.json"},"ai":{"faq":[{"question":"What is the SN74LS378N used for?","answer":"The SN74LS378N is a 6-bit D-type flip-flop used as a register for storing and transferring 6-bit data words in synchronous digital circuits — common in bus-interface latches, control registers, and state-machine storage in 5 V TTL logic systems."},{"question":"What is the closest pin-compatible alternative to the SN74LS378N?","answer":"The SN74LS378N is a 74LS-series 6-bit D-type flip-flop in a 16-pin DIP package. A direct pin-compatible alternative within the same family would be another 74LS378 variant from a different manufacturer, such as the DM74LS378N from Fairchild/onsemi, which shares the same logic function, pinout, and 5 V supply range. Verify the specific timing and drive specs against your BOM before substitution."},{"question":"What compliance documentation does Texas Instruments provide for the SN74LS378N?","answer":"Texas Instruments provides RoHS3 compliance for the SN74LS378N."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS378N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS378N 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}}