{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT243E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT243E","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT243E","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT243E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series CD74HCT243E, 4-bit non-inverting transceiver with 3-state outputs, 4.5V to 5.5V supply, 14-DIP through-hole package, -55°C to 125°C operating temperature.","salesMarkdown":"The Texas Instruments CD74HCT243E is a 74HCT-series 4-bit non-inverting transceiver with 3-state outputs, packaged in a 14-pin DIP (0.300\" body) for through-hole mounting. This part is designed for bidirectional data flow on a 4-bit bus, with separate output-enable controls that let you isolate the bus segments or drive them independently. Typical applications include legacy industrial control backplanes, prototyping boards, and any 5V logic system where a socketed DIP transceiver is preferred over a surface-mount package. ## Military temperature range — avionics and downhole use The 6 mA output drive at both high and low states is modest by modern standards, but within the 5V HCT family it is sufficient for driving a single TTL load or a short PCB trace on a backplane. ## Through-hole DIP — socket-friendly for prototypes and legacy retrofits The 14-pin DIP (0.300\" wide, 7.62 mm pitch) is the classic through-hole footprint that fits standard IC sockets or can be soldered directly into plated-through holes. For a rework lab or a prototype bench, this package is far easier to swap than a surface-mount SOIC. The tube shipping medium is typical for DIP parts and protects the leads during handling.","metaTitle":"CD74HCT243E 74HCT 4-bit Transceiver, 14-DIP, -55°C to 125°C","metaDescription":"CD74HCT243E 74HCT series 4-bit non-inverting transceiver with 3-state outputs. 14-DIP through-hole package, 4.5V to 5.5V supply, -55°C to 125°C operating range.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74HCT","Package":"Tube","Logic Type":"Transceiver, Non-Inverting","Output Type":"3-State","Mounting Type":"Through Hole","Package / Case":"14-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":"14-PDIP","Current - Output High, Low":"6mA, 6mA","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.38","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.38000","currency":"USD"},{"qty":10,"price":"$1.23500","currency":"USD"},{"qty":25,"price":"$1.17240","currency":"USD"},{"qty":100,"price":"$0.96300","currency":"USD"},{"qty":250,"price":"$0.90020","currency":"USD"},{"qty":500,"price":"$0.79552","currency":"USD"},{"qty":1000,"price":"$0.62805","currency":"USD"},{"qty":2500,"price":"$0.59250","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/99a5d50ec14907592e6b01518d2227de.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can I use CD74HCT243E as a replacement for 74HCT245?","answer":"Not directly — the CD74HCT243E is a 4-bit transceiver, while the 74HCT245 is an 8-bit transceiver. The pinouts differ, and the 74HCT243E uses a different control scheme. For a 4-bit bus segment the CD74HCT243E fits; for an 8-bit replacement you would need two devices or a different part."},{"question":"What is the difference between CD74HCT243E and CD74HC243E?","answer":"The CD74HCT243E is the HCT (High-Speed CMOS, TTL-compatible) variant, while the CD74HC243E is the HC (High-Speed CMOS, CMOS-compatible) version. The HCT version has TTL-level input thresholds, making it a direct drop-in for 5V TTL logic systems without extra level shifting. The HC version uses CMOS thresholds and may not switch correctly with TTL input levels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT243E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT243E when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}