{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD4049UBD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD4049UBD","canonicalUrl":"https://icboms.com/texas-instruments/CD4049UBD","factsUrl":"https://icboms.com/api/mcp/products/CD4049UBD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 4000B series hex inverter, CD4049UBD, 6 circuits, 1 input per circuit, 3V to 18V supply, -55°C to 125°C, 50ns propagation delay at 15V, 50pF, 16-SOIC package.","salesMarkdown":"## What this part is and where it fits The CD4049UBD is a hex inverter from the 4000B CMOS logic family, containing six independent inverter gates each with a single input. It operates from a 3V to 18V supply range, making it suitable for battery-powered or unregulated-rail designs where a 5V-only gate would drop out. The -55°C to 125°C temperature grade qualifies it for military, avionics, downhole, and outdoor industrial environments where the board sees extreme thermal cycling. ## Key ratings and what they mean for your BOM The 3V to 18V supply range is the headline feature — it lets this inverter work from a 3.6V Li-ion cell down to near depletion, or from a 12V industrial rail without a regulator. The 4 µA quiescent current (max) keeps the standby draw negligible in battery-backed systems. Output drive is asymmetric: 4.3 mA sourcing and 24 mA sinking at rated supply, which means it can directly drive a low-power LED or a CMOS input but not a relay coil without a buffer. Propagation delay is 50 ns at 15V with a 50 pF load — that is about 10x slower than a 74AC gate, so it is a poor fit for high-speed clock trees or fast bus interfaces, but perfectly adequate for panel switch debounce, level translation, or enable logic running below a few MHz. ## Package and footprint The CD4049UBD is supplied in a 16-pin SOIC package (0.154\" body width, 3.90 mm) with a surface-mount footprint. The supplier device package is 16-SOIC. This is a standard SOIC-16 layout shared across many 4000B and 74HC series parts, so the PCB footprint is well-established and easy to route. No exposed pad — thermal management is straightforward for a CMOS gate drawing microamps. ## Lifecycle and sourcing reality There is no last-time-buy or obsolescence risk on this line. The 4000B series has been manufactured for decades and remains a staple for low-speed, wide-voltage, high-temperature logic. For dual-sourcing resilience, the CD4049UBD is a standard 4000B inverter — functionally equivalent to other manufacturers' 4049UB devices in the same package, though pin compatibility should be verified against the specific alternate order code.","metaTitle":"CD4049UBD Hex Inverter, 4000B CMOS, 3V-18V, -55 to 125°C","metaDescription":"CD4049UBD is a hex inverter from the 4000B series. Wide 3V to 18V supply, -55°C to 125°C temp range, 50ns propagation delay at 15V.","metaKeywords":null},"attributes":{"series":"4000B","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"4000B","Package":"Tube","Logic Type":"Inverter","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Inputs":"1","Voltage - Supply":"3V ~ 18V","Number of Circuits":"6","Operating Temperature":"-55°C ~ 125°C","Input Logic Level - Low":"1V ~ 2.5V","Supplier Device Package":"16-SOIC","Input Logic Level - High":"4V ~ 12.5V","Current - Quiescent (Max)":"4 µA","Current - Output High, Low":"4.3mA, 24mA","Max Propagation Delay @ V, Max CL":"50ns @ 15V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.19","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.19000","currency":"USD"},{"qty":10,"price":"$1.06000","currency":"USD"},{"qty":25,"price":"$1.00600","currency":"USD"},{"qty":100,"price":"$0.82650","currency":"USD"},{"qty":250,"price":"$0.77260","currency":"USD"},{"qty":500,"price":"$0.68274","currency":"USD"},{"qty":1000,"price":"$0.53901","currency":"USD"},{"qty":2500,"price":"$0.50850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cee5e635680f5c2543b21b033300d6fe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the function of CD4049UBD?","answer":"CD4049UBD is a hex inverter — six independent NOT gates, each with one input and one output. It performs logic inversion: a high input gives a low output, and vice versa."},{"question":"Can CD4049UBD be used as a replacement for CD4049BE?","answer":"CD4049UBD and CD4049BE are functionally identical (hex inverter, 4000B series), but the package differs: CD4049UBD is surface-mount SOIC-16, while CD4049BE is through-hole PDIP-16. They are not pin-compatible on the same PCB footprint without a board redesign."},{"question":"What is the closest functional second-source to CD4049UBD?","answer":"The CD4025BM96 is a 4000B series triple NOR gate, not a direct inverter replacement. For a hex inverter, look at other 4049UB devices in SOIC-16 from manufacturers like Nexperia or ON Semiconductor — verify pinout and electrical specs against the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD4049UBD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD4049UBD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-14T11:08:21.244Z","lastPublished":"2026-07-14T11:08:21.244Z","indexable":true}}