{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT390MT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT390MT","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT390MT","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT390MT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series CD74HCT390MT dual decade ripple counter, 27 MHz count rate, negative-edge trigger, asynchronous reset, 4.5-5.5 V supply, -55 to 125°C, 16-SOIC package.","salesMarkdown":"## Dual decade counter in a hand-solderable SOIC The CD74HCT390MT packs two independent decade counters (divide-by-10) into a single 16-SOIC narrow body (3.90 mm wide, 1.27 mm pitch). Each element has its own clock input, asynchronous reset, and four BCD outputs — so you can build a two-digit counter or frequency divider with one IC and a handful of passives. The 27 MHz count rate means it reliably tracks input pulses up to that frequency; above that, internal propagation delays may cause missed edges. The negative-edge trigger pairs naturally with positive-edge triggered counters in a cascade without needing an inverter between stages. ## Supply rails and temperature range Runs on a 4.5 V to 5.5 V supply — the classic 5 V logic rail. The 74HCT family uses TTL-compatible input thresholds, so it accepts 5 V TTL outputs directly without a level shifter. The -55°C to 125°C operating range covers military temperature grade; the part keeps counting reliably in engine-bay heat or outdoor enclosures. Asynchronous reset clears the counter immediately when the reset pin goes high — no clock edge needed. This is handy for power-on reset circuits or an emergency clear that must happen regardless of clock state. ## Lifecycle and compliance Texas Instruments lists the CD74HCT390MT as Active — no end-of-life notice, suitable for new designs and production builds. ROHS3 compliant, meeting EU RoHS recast requirements.","metaTitle":"CD74HCT390MT Dual Decade Counter, 27 MHz, 16-SOIC","metaDescription":"Texas Instruments CD74HCT390MT dual decade ripple counter, 27 MHz count rate, asynchronous reset, -55 to 125°C, 16-SOIC. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Reset":"Asynchronous","Series":"74HCT","Package":"Tape & Reel (TR); Cut Tape (CT)","Direction":"Up","Count Rate":"27 MHz","Logic Type":"Counter, Decade","Trigger Type":"Negative Edge","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Number of Elements":"2","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"16-SOIC","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.34","priceTiers":[{"qty":1,"price":"$1.34000","currency":"USD"},{"qty":10,"price":"$1.19500","currency":"USD"},{"qty":25,"price":"$1.13360","currency":"USD"},{"qty":100,"price":"$0.93130","currency":"USD"},{"qty":250,"price":"$0.87056","currency":"USD"},{"qty":500,"price":"$0.76934","currency":"USD"},{"qty":1250,"price":"$0.60738","currency":"USD"},{"qty":2500,"price":"$0.57300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d095274bd3198fa3f7f5bb10007b48ee.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CD74HCT390MT/alternatives.json"},"ai":{"faq":[{"question":"What does the asynchronous reset mean on this counter?","answer":"The asynchronous reset clears the counter outputs to zero immediately when the reset pin goes high, without waiting for a clock edge. This is useful for power-on initialization or an emergency clear that must happen regardless of clock state."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT390MT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT390MT 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}}