{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX6839XSD0","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX6839XSD0","canonicalUrl":"https://icboms.com/analog-devices/MAX6839XSD0","factsUrl":"https://icboms.com/api/mcp/products/MAX6839XSD0","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX6839XSD0, Simple Reset/Power-On Reset, Active High, Push-Pull Output, SC-70-4, 140ms Minimum Reset Timeout, -40°C to 85°C.","salesMarkdown":"## What this supervisor does on your board The Maxim Integrated MAX6839XSD0 is a single-channel simple reset/power-on reset supervisor in a compact SC-70-4 package. It asserts a reset signal on power-up and holds it active for a minimum of 140 ms after the supply crosses the adjustable/selectable threshold, giving the system time to stabilize. The active-high, push-pull output directly drives the reset input of most MCUs, FPGAs, or SoCs without needing an external pull-up resistor. Operating over -40°C to 85°C, it fits industrial control, telecom, and general-purpose embedded designs where a clean, timed power-on reset is required. ## 140 ms reset timeout — what it buys you The 140 ms minimum reset timeout holds the processor in reset long enough for the supply rail to settle and the oscillator to start reliably. For a typical MCU with a startup time of a few milliseconds, this provides ample margin. If your design uses a fast-starting FPGA or a processor with a short power-on reset window, the 140 ms delay is conservative but harmless — the supervisor simply holds reset a bit longer than needed. No external timing capacitor is required; the timeout is fixed internally. ## Active high output — check your logic polarity The MAX6839XSD0 asserts a logic high on the reset pin during power-up and fault conditions. Many processors expect an active-low reset, so verify the polarity of your target device's reset input before specifying this part. If your design requires an active-low signal, look for the active-low sibling in the same family. The push-pull output stage can source and sink current, so it drives CMOS and TTL inputs cleanly without an external resistor. ## Package and footprint Housed in an SC-70-4 (also known as SOT-343), this part occupies minimal board area. The four-pin footprint is standard for simple supervisor ICs, making it straightforward to route on a dense PCB. ## Lifecycle and sourcing reality However, note that the part is marked RoHS non-compliant — it contains lead (Pb) in the solder finish or die attach. This limits its use in new designs bound for RoHS-regulated markets (EU, California, etc.) unless an exemption applies. For legacy or exempt applications, stock is available through independent distribution; we source and quote to order against an RFQ, confirming current availability and pricing at quote time. If you need a RoHS-compliant alternative, Maxim offers functionally similar supervisors in the same family — check the active-low or adjustable-threshold variants for lead-free options.","metaTitle":"MAX6839XSD0 Simple Reset/Power-On Reset, Active High","metaDescription":"MAX6839XSD0 simple reset/power-on reset IC, active high push-pull output, 140ms min timeout, SC-70-4 package, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Simple Reset/Power-On Reset","Reset":"Active High","Output":"Push-Pull, Totem Pole","Package":"Bulk","Mounting Type":"Surface Mount","Reset Timeout":"140ms Minimum","Package / Case":"SC-82A, SOT-343","lifecycle_stage":"eol_hot","Voltage - Threshold":"Adjustable/Selectable","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"SC-70-4","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.74","stockQuantity":0,"priceTiers":[{"qty":110,"price":"$2.74000","currency":"USD"}]},"links":{"datasheetUrl":"https://rocelec.widen.net/view/pdf/1j7exzhs1z/MAXMS05635-1.pdf?t.download=true&u=5oefqw","sourceUrl":null},"ai":{"faq":[{"question":"What is the reset timeout of MAX6839XSD0?","answer":"The reset timeout is a minimum of 140 ms. The supervisor holds the reset output active for at least this duration after the supply voltage rises above the threshold."},{"question":"Is MAX6839XSD0 active high or active low?","answer":"The MAX6839XSD0 has an active-high reset output. It asserts a logic high during power-up and fault conditions. Verify that your processor's reset input expects a high level."},{"question":"Can MAX6839XSD0 monitor multiple voltages?","answer":"No, the MAX6839XSD0 monitors a single voltage rail. It has one voltage-monitoring channel. For multi-voltage supervision, look at Maxim's multi-voltage supervisor family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX6839XSD0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX6839XSD0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}