{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SR1CARU","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SR1CARU","canonicalUrl":"https://icboms.com/stmicroelectronics/SR1CARU","factsUrl":"https://icboms.com/api/mcp/products/SR1CARU","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Smart Reset™ SR1CARU, Reset Timer, Active Low, Open Drain or Open Collector, Adjustable/Selectable Reset Timeout, Adjustable/Selectable Voltage Threshold, 6-UDFN (1.45x1), -40°C to 85°C.","salesMarkdown":"The STMicroelectronics SR1CARU is a single-channel reset timer from the Smart Reset™ family, designed to hold a microcontroller or other logic device in reset until the supply rail has stabilised and a user-programmable timeout has elapsed. Its active-low, open-drain output directly drives the /RESET pin of most MCUs without needing a level translator. The adjustable threshold and timeout make it a flexible choice for designs where the power-up sequence or brown-out recovery window isn't fixed at the layout stage. Unlike fixed-threshold supervisors (e.g. the STM809 series with a 140 ms timeout), the SR1CARU lets you set both the voltage trip point and the reset release delay with external components. That matters when your power rail has a slow ramp or you need a longer hold-off to let an external sensor or transceiver initialise before the MCU starts executing code. One external capacitor sets the timeout; the threshold is set by a resistor divider on the sense input. This configurability reduces the number of unique supervisor SKUs on the BOM — one part covers multiple rail voltages and timing requirements across a product family. ## Active-low open-drain output The open-drain output pulls low when the monitored voltage drops below the threshold or during power-up. It releases after the timeout expires.","metaTitle":"SR1CARU Smart Reset™ Reset Timer, Active Low, Open Drain","metaDescription":"SR1CARU is an STMicroelectronics Smart Reset™ reset timer with adjustable timeout and threshold. Active-low open-drain output in 6-UDFN. -40 to 85°C.","metaKeywords":null},"attributes":{"series":"Smart Reset™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Reset Timer","Reset":"Active Low","Output":"Open Drain or Open Collector","Series":"Smart Reset™","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"Adjustable/Selectable","Package / Case":"6-UDFN","lifecycle_stage":"eol_hot","Voltage - Threshold":"Adjustable/Selectable","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"6-UDFN (1.45x1)","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.14","priceTiers":[{"qty":1,"price":"$1.14000","currency":"USD"},{"qty":10,"price":"$1.02200","currency":"USD"},{"qty":25,"price":"$0.96960","currency":"USD"},{"qty":100,"price":"$0.79660","currency":"USD"},{"qty":250,"price":"$0.74460","currency":"USD"},{"qty":500,"price":"$0.65802","currency":"USD"},{"qty":1000,"price":"$0.51949","currency":"USD"},{"qty":3000,"price":"$0.48486","currency":"USD"},{"qty":6000,"price":"$0.46062","currency":"USD"},{"qty":15000,"price":"$0.44330","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/57a4a97def8c77898e2fb1c67068da65.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SR1CARU/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional equivalent to SR1CARU?","answer":"The STM1061N29WX6F is a close functional peer: also an active-low, open-drain supervisor in a small package with a -40°C to 85°C range. The key difference is that the STM1061 has a fixed 30 µs typical propagation delay rather than an adjustable timeout. If your design needs a configurable timeout, the SR1CARU is the right choice; for a fixed, fast-acting reset, the STM1061 is an alternative."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SR1CARU","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SR1CARU 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}}