{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HC161M","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HC161M","canonicalUrl":"https://icboms.com/texas-instruments/CD74HC161M","factsUrl":"https://icboms.com/api/mcp/products/CD74HC161M","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series CD74HC161M, synchronous 4-bit binary counter with asynchronous reset, 24 MHz count rate, 2 V to 6 V supply, -55°C to 125°C, 16-SOIC package.","salesMarkdown":"## What this counter is and where it fits The CD74HC161M is a 4-bit synchronous binary counter from the 74HC family, designed for moderate-speed digital counting, frequency division, and event sequencing in systems that need a clean, glitch-free count with an asynchronous reset to zero. It counts up on each negative edge of the clock input, and the asynchronous reset (active low) forces all outputs low independently of the clock — useful for initializing counters in motor drive timing, industrial PLC sequencers, or telecom frame synchronizers without waiting for a clock edge. ## 24 MHz count rate — what it means for timing margin Count rate is 24 MHz. ## Military temperature range — design margin without a separate grade Rated for -55°C to 125°C, the CD74HC161M covers the full military temperature range. That means it's suitable for avionics, satellite, downhole drilling, or outdoor telecom cabinets where ambient extremes are routine. ## Active lifecycle — no LTB risk for inventory planning The CD74HC161M is listed as Active with RoHS3 compliance. For procurement, that means no imminent last-time-buy, no end-of-life watch, and no need to stockpile against discontinuation. ## Package and storage notes Supplied in a 16-SOIC (0.154\", 3.90 mm width) surface-mount package, the CD74HC161M ships in Tube form. The 16-SOIC footprint is common and easy to hand-solder or reflow.","metaTitle":"CD74HC161M 74HC Binary Counter, 24 MHz, 16-SOIC","metaDescription":"CD74HC161M 4-bit synchronous binary counter, 24 MHz count rate, -55°C to 125°C, 2-6 V supply, active and RoHS3 compliant.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Reset":"Asynchronous","Series":"74HC","Timing":"Synchronous","Package":"Tube","Direction":"Up","Count Rate":"24 MHz","Logic Type":"Binary Counter","Trigger Type":"Negative Edge","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2 V ~ 6 V","Number of Elements":"1","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"16-SOIC","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.36","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.36000","currency":"USD"},{"qty":10,"price":"$1.22000","currency":"USD"},{"qty":25,"price":"$1.15760","currency":"USD"},{"qty":100,"price":"$0.95080","currency":"USD"},{"qty":250,"price":"$0.88880","currency":"USD"},{"qty":500,"price":"$0.78546","currency":"USD"},{"qty":1000,"price":"$0.62010","currency":"USD"},{"qty":2500,"price":"$0.58500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4bee828cd9d1f1a676e26e76aa1d7c47.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the function of CD74HC161M?","answer":"The CD74HC161M is a 4-bit synchronous binary counter that counts up on each negative edge of the clock input. It has an asynchronous reset that forces all outputs low regardless of the clock state, making it useful for initialization in counting, frequency division, and event sequencing circuits."},{"question":"What is the count rate of CD74HC161M?","answer":"The CD74HC161M has a count rate of 24 MHz, meaning it can reliably count clock edges up to 24 MHz. For systems with a clock below that frequency, timing margin is sufficient."},{"question":"Is CD74HC161M synchronous or asynchronous?","answer":"The CD74HC161M is a synchronous counter — the outputs change state only on the clock edge. However, its reset is asynchronous, meaning the reset takes effect immediately without waiting for a clock edge."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HC161M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HC161M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}