{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STWD100NPWY3F","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STWD100NPWY3F","canonicalUrl":"https://icboms.com/stmicroelectronics/STWD100NPWY3F","factsUrl":"https://icboms.com/api/mcp/products/STWD100NPWY3F","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STWD100NPWY3F Automotive Watchdog Circuit, AEC-Q100, Active Low Reset, Open Drain Output, 2.3ms Minimum Reset Timeout, -40°C to 125°C, SOT-23-5.","salesMarkdown":"## Watchdog supervisor for automotive and industrial systems The STMicroelectronics STWD100NPWY3F is a single-channel watchdog supervisor IC in a SOT-23-5 package, designed to monitor microcontroller activity and assert a system reset if the watchdog service pulse is missed. It provides an active-low, open-drain reset output, which allows direct connection to MCU reset pins or wired-OR configurations with other fault signals. ## 2.3 ms minimum reset timeout — what it means for system response The STWD100NPWY3F has a minimum reset timeout of 2.3 ms, which is significantly shorter than the 140 ms minimum offered by general-purpose reset ICs like the STM706 or STM809. This fast timeout suits applications where the MCU must recover quickly from a fault — for example, in safety-critical sensor loops or actuator control where a 140 ms pause would exceed the system's fault-reaction budget. It also reduces the risk of nuisance resets in systems that service the watchdog at a high rate. ## Active production — no LTB concerns on this line","metaTitle":"STWD100NPWY3F Watchdog Circuit, AEC-Q100, SOT-23-5","metaDescription":"STMicroelectronics STWD100NPWY3F watchdog supervisor IC, AEC-Q100 qualified, active-low open-drain reset, 2.3ms min timeout, -40°C to 125°C, SOT-23-5.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Watchdog Circuit","Reset":"Active Low","Output":"Open Drain or Open Collector","Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"2.3ms Minimum","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"SOT-23-5","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.18","priceTiers":[{"qty":1,"price":"$1.18000","currency":"USD"},{"qty":10,"price":"$1.05100","currency":"USD"},{"qty":25,"price":"$0.99720","currency":"USD"},{"qty":100,"price":"$0.81910","currency":"USD"},{"qty":250,"price":"$0.76568","currency":"USD"},{"qty":500,"price":"$0.67664","currency":"USD"},{"qty":1000,"price":"$0.53419","currency":"USD"},{"qty":3000,"price":"$0.49858","currency":"USD"},{"qty":6000,"price":"$0.47365","currency":"USD"},{"qty":15000,"price":"$0.45584","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/af0c89d2823f1e5c27969fa122fdb0a9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STWD100NPWY3F/alternatives.json"},"ai":{"faq":[{"question":"Is STWD100NPWY3F AEC-Q100 qualified?","answer":"Yes, the STWD100NPWY3F is part of the Automotive, AEC-Q100 series, qualified for automotive-grade applications including under-hood and engine-bay environments."},{"question":"What is the STWD100NPWY3F reset timeout?","answer":"The reset timeout has a minimum of 2.3 ms, which is a fast recovery interval compared to typical 140 ms reset ICs."},{"question":"Can STWD100NPWY3F replace a standard watchdog IC?","answer":"It can replace a standard watchdog IC in designs that require an active-low, open-drain reset output and an automotive temperature range. The 2.3 ms minimum timeout is faster than many general-purpose watchdog ICs, so confirm the system's watchdog service interval is compatible before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STWD100NPWY3F","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STWD100NPWY3F 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}}