{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74AC257E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74AC257E","canonicalUrl":"https://icboms.com/texas-instruments/CD74AC257E","factsUrl":"https://icboms.com/api/mcp/products/CD74AC257E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74AC series CD74AC257E, Type Multiplexer, Circuit 4 x 2:1, 1.5V to 5.5V supply, 24mA output drive, -55°C to 125°C, 16-DIP (0.300\", 7.62mm), Through Hole, Tube.","salesMarkdown":"## 4 x 2:1 multiplexer in the 74AC family — what it is and where it fits The CD74AC257E is a 4 x 2:1 multiplexer from the 74AC series, a high-speed CMOS logic family that combines the low power of CMOS with the speed of advanced CMOS. It selects one of two 4-bit data inputs based on a single select line, routing the chosen nibble to the output. The part operates from a 1.5V to 5.5V supply, making it suitable for mixed-voltage systems where a 3.3V core interfaces with 5V peripherals. With a military temperature range of -55°C to 125°C, it is rated for avionics, satellite, downhole drilling, and other environments where the board sees extreme thermal cycling. The 16-pin DIP package (0.300\" body width) is a through-hole footprint that suits prototyping, legacy board repairs, and designs where vibration resistance or manual rework is a priority. ## Supply range and output drive — what the ratings mean for your BOM The 1.5V to 5.5V supply range is wide enough to cover standard logic rails from 1.8V through 5V. In a 3.3V system the part runs without a level translator when the select and data inputs are also 3.3V; at 5V it can directly drive legacy TTL inputs. The 24mA output sink and source capability at both logic levels means the multiplexer can drive a bus line or a bank of LEDs without a buffer — useful in panel indicator or status-latch applications. The 24mA figure is symmetrical, so the output high and low levels stay balanced under load, which simplifies timing analysis in synchronous designs. ## Active lifecycle — no last-time-buy pressure The CD74AC257E carries an Active product status per the manufacturer, with ROHS3 compliance. The 74AC family is broadly second-sourced; if dual-sourcing is required, the standard 74AC257 in a DIP-16 package from other vendors is a direct form-fit-function alternate — verify the exact order code for your preferred supplier's inventory.","metaTitle":"CD74AC257E 74AC Multiplexer, 4 x 2:1, 16-DIP, -55 to 125°C","metaDescription":"CD74AC257E 74AC series 4 x 2:1 multiplexer in 16-DIP package. 1.5V to 5.5V supply, 24mA output drive, -55°C to 125°C range. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74AC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Multiplexer","Series":"74AC","Circuit":"4 x 2:1","Package":"Tube","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"1.5V ~ 5.5V","Independent Circuits":"1","Operating Temperature":"-55°C ~ 125°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-PDIP","Current - Output High, Low":"24mA, 24mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.40000","currency":"USD"},{"qty":10,"price":"$1.25100","currency":"USD"},{"qty":25,"price":"$1.18720","currency":"USD"},{"qty":100,"price":"$0.97520","currency":"USD"},{"qty":250,"price":"$0.91160","currency":"USD"},{"qty":500,"price":"$0.80560","currency":"USD"},{"qty":1000,"price":"$0.63600","currency":"USD"},{"qty":2500,"price":"$0.60000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/794b534806e2437593f07555aac62bb8.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74AC257E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74AC257E when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}