{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD4021BM","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD4021BM","canonicalUrl":"https://icboms.com/texas-instruments/CD4021BM","factsUrl":"https://icboms.com/api/mcp/products/CD4021BM","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 4000B series shift register, CD4021BM, 8-bit parallel or serial to serial, push-pull output, 3V to 18V supply, -55°C to 125°C, 16-SOIC.","salesMarkdown":"## What the 3V to 18V supply range means for your rail The CD4021BM is an 8-stage static shift register from TI's 4000B series, accepting parallel or serial data and outputting it serially with push-pull drive. Its 3V to 18V supply span covers the full range of standard logic rails — from a 3.3V microcontroller bus up to a 15V industrial control supply — without needing a separate level translator at the input or output. This covers cold-start conditions in outdoor telecom cabinets and the sustained heat inside a sealed enclosure near a motor drive, where ambient air can reach 85°C and junction temperature climbs further under load. Board layout is straightforward — the 1.27 mm pin pitch routes easily on two-layer boards without micro-vias.","metaTitle":"CD4021BM Shift Register, 8-Bit, 3-18V, 16-SOIC","metaDescription":"Texas Instruments CD4021BM 4000B series 8-bit parallel/serial shift register, 3V to 18V supply, -55°C to 125°C, 16-SOIC. Active, ROHS3 compliant. Buy CD4021BM.","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":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 18V","Number of Elements":"1","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"16-SOIC","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.34","priceTiers":[{"qty":1,"price":"$1.34000","currency":"USD"},{"qty":10,"price":"$1.19800","currency":"USD"},{"qty":25,"price":"$1.13680","currency":"USD"},{"qty":100,"price":"$0.93380","currency":"USD"},{"qty":250,"price":"$0.87284","currency":"USD"},{"qty":500,"price":"$0.77136","currency":"USD"},{"qty":1000,"price":"$0.60897","currency":"USD"},{"qty":2500,"price":"$0.57450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/704ed694f34c786246e0bd5232122f29.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CD4021BM/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD4021BM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD4021BM 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}}