{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS259BDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS259BDR","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS259BDR","factsUrl":"https://icboms.com/api/mcp/products/SN74LS259BDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series D-Type Addressable Latch, SN74LS259BDR, 1:8 circuit, 19ns propagation delay, 4.75-5.25V supply, 16-SOIC surface mount.","salesMarkdown":"## 1:8 addressable latch for bus expansion The Texas Instruments SN74LS259BDR is an 8-bit addressable latch from the 74LS Schottky-clamped bipolar family, organized as a 1:8 demultiplexer with a standard output type. It takes a single data input and routes it to one of eight output latches selected by the three address lines — useful for expanding a microcontroller's output ports or implementing a serial-to-parallel converter on a low-pin-count bus. The 19ns propagation delay is typical for LS logic and sets the ceiling for the data clock rate: at 5V supply, the output settles within 19ns of the address or data change, so the downstream logic must wait at least that long before strobing the latched data. The 400µA source / 8mA sink output current drives standard LS or HCT inputs directly but will struggle with a heavily loaded bus — plan a buffer if fan-out exceeds ten loads. ## Supply and package constraints The 4.75V to 5.25V supply rail is a tight 5V ±5% — a switching regulator with 1% set-point accuracy is fine, but a 5V rail from a 78L05 regulator with 5% tolerance and load regulation may drift below 4.75V at full load, causing the latch to behave unpredictably.","metaTitle":"SN74LS259BDR 8-Bit Addressable Latch, 19ns, 16-SOIC","metaDescription":"TI SN74LS259BDR D-Type addressable latch, 1:8 circuit, 19ns propagation delay, 4.75-5.25V supply. Active production, ROHS3 compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Series":"74LS","Circuit":"1:8","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"D-Type, Addressable","Output Type":"Standard","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Independent Circuits":"1","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"16-SOIC","Delay Time - Propagation":"19ns","Current - Output High, Low":"400µA, 8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.16","priceTiers":[{"qty":1,"price":"$1.16000","currency":"USD"},{"qty":10,"price":"$1.03800","currency":"USD"},{"qty":25,"price":"$0.98520","currency":"USD"},{"qty":100,"price":"$0.80940","currency":"USD"},{"qty":250,"price":"$0.75664","currency":"USD"},{"qty":500,"price":"$0.66864","currency":"USD"},{"qty":1000,"price":"$0.52788","currency":"USD"},{"qty":2500,"price":"$0.49800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b964a5c7d2a7010efccb8bba136ad41d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS259BDR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to SN74LS259BDR?","answer":"The 74FCT573APC is a different logic family (74FCT vs 74LS) and a different function — it is an 8-bit transparent latch (8:8), not an addressable latch (1:8). The 74FCT573APC has a faster 8.5ns propagation delay and tri-state outputs, but it is a through-hole part in a different package. It is not a pin-to-pin or functional drop-in for the SN74LS259BDR."},{"question":"What does the 1:8 circuit mean for the SN74LS259BDR?","answer":"The 1:8 circuit means the latch has one data input that is routed to one of eight output latches, selected by three address lines (A0-A2). This is an addressable latch / 1-of-8 demultiplexer — useful for expanding a microcontroller's output ports by using three address pins to control eight separate latched outputs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS259BDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS259BDR 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}}