{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS90N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS90N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS90N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS90N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series, SN74LS90N, IC DECADE COUNTER 14-DIP. Asynchronous reset, negative-edge triggered, 42 MHz count rate, 4.75 V–5.25 V supply, 0°C to 70°C, 14-PDIP.","salesMarkdown":"## Asynchronous reset — clears without waiting for a clock edge The reset is asynchronous, meaning the counter clears immediately when the reset line is asserted — no need to wait for the next clock edge. That's useful for power-on reset circuits or emergency clears in a divider chain, but it also means the reset input must be free of glitches or properly debounced in noisy environments. The part is a single-element, 4-bit counter; one package gives you one decade stage. ## Commercial temperature grade — indoor, controlled environments only Rated 0°C to 70°C, this is a commercial-temperature part. It belongs in benchtop instruments, office equipment, or appliance control boards. ## Active lifecycle — no end-of-life pressure The SN74LS90N is listed as Active and ROHS3 compliant. TI still manufactures this part, so there is no last-time-buy clock ticking. For a BOM freeze or a production line that needs a through-hole decade counter, this is a stable line item — no imminent PCN or EOL to watch. Sourcing is through independent distribution; availability and pricing are confirmed at quote time against an RFQ.","metaTitle":"SN74LS90N Decade Counter, 42 MHz, 14-DIP – TI 74LS","metaDescription":"SN74LS90N decade counter from TI 74LS family. Asynchronous reset, 42 MHz count rate, 4.75–5.25 V supply, 0–70°C. Active, ROHS3. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Reset":"Asynchronous","Series":"74LS","Package":"Tube","Direction":"Up","Count Rate":"42 MHz","Logic Type":"Counter, Decade","Trigger Type":"Negative Edge","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","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":"14-PDIP","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.88","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.88000","currency":"USD"},{"qty":10,"price":"$2.59000","currency":"USD"},{"qty":25,"price":"$2.44320","currency":"USD"},{"qty":100,"price":"$2.08170","currency":"USD"},{"qty":250,"price":"$1.95464","currency":"USD"},{"qty":500,"price":"$1.71032","currency":"USD"},{"qty":1000,"price":"$1.41711","currency":"USD"},{"qty":2500,"price":"$1.38300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ff182b158d16e138e6038502259ad546.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How fast can the SN74LS90N count?","answer":"The maximum count rate is 42 MHz. It will reliably divide or count clock signals up to that frequency."},{"question":"What is the pinout of SN74LS90N?","answer":"The SN74LS90N comes in a 14-pin PDIP. The standard 74LS90 pinout includes clock A (pin 14), clock B (pin 1), reset inputs R0(1) and R0(2) (pins 2, 3), reset inputs R9(1) and R9(2) (pins 6, 7), and outputs QA–QD (pins 8–11). Consult the TI datasheet for the full connection diagram."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS90N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS90N 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}}