{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD4021BE","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD4021BE","canonicalUrl":"https://icboms.com/texas-instruments/CD4021BE","factsUrl":"https://icboms.com/api/mcp/products/CD4021BE","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments CD4021BE, 4000B series, 8-bit static shift register, parallel or serial to serial, push-pull output, 3V to 18V supply, -55°C to 125°C, 16-DIP (0.300\", 7.62mm), through-hole, Tube.","salesMarkdown":"## 8-bit static shift register for GPIO expansion and daisy-chain data capture The Texas Instruments CD4021BE is an 8-bit static shift register from the 4000B CMOS logic family. It accepts data in parallel (from eight input pins) or serial-in, and shifts it out serially on a push-pull output — a standard building block for expanding microcontroller GPIO or capturing multiple switch/encoder states over a single wire. The 3V to 18V supply range means it works in 5V, 12V, or unregulated battery systems without a level shifter, and the -55°C to 125°C military temperature grade suits avionics, satellite, and downhole instrumentation where the board sees extreme thermal cycling. ## Supply range and temperature — the two specs that decide fit The 3V to 18V supply range covers 5V, 12V, and unregulated battery systems. The -55°C to 125°C operating range is the full military-grade band. ## Active lifecycle — no LTB risk, still a standard catalog item The CD4021BE is listed as Active and ROHS3 compliant. That means Texas Instruments still manufactures it, there is no last-time-buy window closing, and it is not being end-of-lifed. For a BOM freeze or a long-life design, this part does not carry obsolescence risk today. The 4000B series has been in production for decades, and the through-hole DIP variants tend to stay active longer than their surface-mount counterparts because industrial and military customers keep ordering them.","metaTitle":"CD4021BE 4000B Shift Register, 8-Bit, 3V-18V, -55°C to 125°C","metaDescription":"CD4021BE 8-bit static shift register from TI 4000B series. Parallel or serial to serial output, push-pull. 3V to 18V supply, -55°C to 125°C. Through-hole","metaKeywords":null},"attributes":{"series":"4000B","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"4000B","Package":"Tube","Function":"Parallel or Serial to Serial","Logic Type":"Shift Register","Output Type":"Push-Pull","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 18V","Number of Elements":"1","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"16-PDIP","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.81","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.81000","currency":"USD"},{"qty":10,"price":"$0.71700","currency":"USD"},{"qty":25,"price":"$0.67360","currency":"USD"},{"qty":100,"price":"$0.54980","currency":"USD"},{"qty":250,"price":"$0.51064","currency":"USD"},{"qty":500,"price":"$0.43460","currency":"USD"},{"qty":1000,"price":"$0.34768","currency":"USD"},{"qty":2500,"price":"$0.31508","currency":"USD"},{"qty":5000,"price":"$0.30750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/704ed694f34c786246e0bd5232122f29.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CD4021BE equivalent to other 4000B shift registers?","answer":"The CD4021BE is a parallel-load or serial-in, serial-out 8-bit shift register. The CD4014B is the closest functional sibling — same 8-bit parallel-load shift register in the 4000B family — but verify the pinout against your board before substituting, as load and clock assignments differ between the two."},{"question":"Is CD4021BE compatible with 5V logic?","answer":"Yes. The 3V to 18V supply range includes 5V. At a 5V supply, the CD4021BE input thresholds are compatible with standard 5V CMOS and TTL logic outputs. No level translation is needed when the microcontroller and shift register share a 5V rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD4021BE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD4021BE when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-13T21:42:39.639Z","lastPublished":"2026-07-13T21:42:39.639Z","indexable":true}}