{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT640E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT640E","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT640E","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT640E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series, Transceiver Inverting, 8-bit, 3-State outputs, Through Hole 20-DIP (0.300\", 7.62mm), Tube.","salesMarkdown":"## 20-pin DIP transceiver for 5V busses The CD74HCT640E is an 8-bit inverting transceiver from the 74HCT series, with 3-state outputs that let multiple devices share a common data bus without contention. Housed in a 20-pin DIP (0.300\" body width), the through-hole package suits prototyping boards, legacy hardware rework, and designs where vibration resistance or manual rework is preferred over surface-mount. ## Temperature grade and output drive Each output sources or sinks 6 mA, enough to drive a standard TTL load or a few LED indicators directly, but not intended for high-current bus transceivers — the 6 mA figure sets the fan-out to downstream CMOS inputs at about 10 loads per line.","metaTitle":"Texas Instruments CD74HCT640E 74HCT Transceiver, 20-DIP","metaDescription":"CD74HCT640E 8-bit inverting transceiver, 3-state outputs, 4.5V-5.5V supply, -55°C to 125°C. Active production, ROHS3 compliant. Order via RFQ.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"74HCT","Package":"Tube","Logic Type":"Transceiver, Inverting","Output Type":"3-State","Mounting Type":"Through Hole","Package / Case":"20-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Number of Elements":"1","Operating Temperature":"-55°C ~ 125°C (TA)","Supplier Device Package":"20-PDIP","Current - Output High, Low":"6mA, 6mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.63","priceTiers":[{"qty":1,"price":"$3.63000","currency":"USD"},{"qty":10,"price":"$3.26500","currency":"USD"},{"qty":25,"price":"$3.08600","currency":"USD"},{"qty":100,"price":"$2.67470","currency":"USD"},{"qty":250,"price":"$2.53752","currency":"USD"},{"qty":500,"price":"$2.27692","currency":"USD"},{"qty":1000,"price":"$1.94100","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/246d077263592125d7c6e7121c784549.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CD74HCT640E/alternatives.json"},"ai":{"faq":[{"question":"Will CD74HCT640E drop into a panel that was specified around SN74LS645-1N without rewiring?","answer":"No — the SN74LS645-1N is a non-inverting transceiver, while the CD74HCT640E is inverting. Both are 20-pin DIP, but the logic polarity differs, so a board designed for the LS645 will see inverted data unless the firmware or external logic compensates. The pinout is otherwise compatible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT640E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT640E 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}}