{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS161ANSR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS161ANSR","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS161ANSR","factsUrl":"https://icboms.com/api/mcp/products/SN74LS161ANSR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series SN74LS161ANSR, synchronous 4-bit binary counter, positive-edge triggered, asynchronous reset, 25 MHz count rate, 4.75 V to 5.25 V supply, 0°C to 70°C, 16-SOIC surface-mount package.","salesMarkdown":"## Synchronous 4-bit binary counter with asynchronous reset The Texas Instruments SN74LS161ANSR is a 74LS-series synchronous 4-bit binary counter that increments on the positive edge of the clock. It includes an asynchronous reset (active low) that clears the outputs independently of the clock. The 25 MHz maximum count rate sets the timing budget for the system bus or sensor edge rate. It is not rated for automotive under-hood, outdoor telecom cabinets, or industrial motor drives where ambient temperatures exceed 70°C or drop below freezing. The 16-SO supplier device package matches standard SOIC-16 land patterns.","metaTitle":"SN74LS161ANSR 74LS 4-Bit Binary Counter, 25 MHz, 16-SOIC","metaDescription":"Texas Instruments SN74LS161ANSR synchronous 4-bit binary counter with asynchronous reset. 25 MHz count rate, 4.75-5.25 V supply, 0°C to 70°C.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Reset":"Asynchronous","Series":"74LS","Timing":"Synchronous","Package":"Tape & Reel (TR); Cut Tape (CT)","Direction":"Up","Count Rate":"25 MHz","Logic Type":"Binary Counter","Trigger Type":"Positive Edge","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.209\\\", 5.30mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75 V ~ 5.25 V","Number of Elements":"1","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"16-SO","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.99","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.99000","currency":"USD"},{"qty":10,"price":"$0.87100","currency":"USD"},{"qty":25,"price":"$0.81840","currency":"USD"},{"qty":100,"price":"$0.66780","currency":"USD"},{"qty":250,"price":"$0.62024","currency":"USD"},{"qty":500,"price":"$0.52788","currency":"USD"},{"qty":1000,"price":"$0.42230","currency":"USD"},{"qty":2000,"price":"$0.38272","currency":"USD"},{"qty":6000,"price":"$0.37350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/04ad0a91258bb6d0d6f39b71089943af.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between SN74LS161AN and SN74LS161ANSR?","answer":"The SN74LS161AN is the through-hole DIP version, while the SN74LS161ANSR is the surface-mount 16-SOIC variant. The package suffix 'SR' indicates the SOIC reeled format."},{"question":"Can SN74LS161ANSR be used as a replacement for 74LS161?","answer":"Yes, the SN74LS161ANSR is a direct functional replacement for the generic 74LS161 — same synchronous 4-bit binary counter with asynchronous reset, same 25 MHz count rate, same 5 V supply. The 'SN' prefix indicates Texas Instruments manufacturing; the 'SR' suffix specifies the 16-SOIC surface-mount package. If your existing 74LS161 is in a DIP package, the footprint differs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS161ANSR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS161ANSR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T09:35:06.846Z","lastPublished":"2026-07-16T09:35:06.846Z","indexable":true}}