{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1231-20+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1231-20","canonicalUrl":"https://icboms.com/analog-devices/DS1231-20","factsUrl":"https://icboms.com/api/mcp/products/DS1231-20%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1231-20+, Simple Reset/Power-On Reset IC, Active High/Active Low reset, Open Drain output, 150ms minimum reset timeout, 4.37V/4.62V thresholds, 0°C~70°C, 8-DIP (0.300\", 7.62mm) package, Through Hole mounting.","salesMarkdown":"## What this supervisor does on the board The Maxim Integrated DS1231-20+ is a simple reset/power-on reset supervisor IC that monitors a single voltage rail and asserts a reset signal when the supply drops below a programmed threshold. It provides both active-high and active-low reset outputs from an open-drain output stage, giving the designer flexibility to interface with either polarity of the system's reset input. The reset timeout is a minimum of 150 ms, which gives the main supply and oscillator time to stabilize before the processor starts executing code. ## Thresholds and temperature — fit for your rail This part monitors a single voltage with two internal thresholds: 4.37 V and 4.62 V. The dual-threshold scheme provides built-in hysteresis — the reset asserts at the lower threshold and de-asserts at the higher one, preventing chatter during a slowly rising supply. The operating temperature range is 0°C to 70°C, which suits indoor equipment, office electronics, and benchtop instruments but not outdoor or under-hood automotive environments. ## Package and mounting Housed in an 8-pin PDIP (0.300\" wide, 7.62 mm pitch) with through-hole mounting, the DS1231-20+ is a straightforward part to hand-assemble or rework. ## Sourcing and lifecycle The DS1231-20+ carries an Active lifecycle status and is ROHS3 compliant.","metaTitle":"DS1231-20+ Simple Reset/Power-On Reset, 150ms Timeout","metaDescription":"Maxim DS1231-20+ Simple Reset/Power-On Reset IC. Active High/Low reset, open-drain output, 4.37V/4.62V thresholds, 150ms min timeout, 0-70°C, 8-PDIP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Simple Reset/Power-On Reset","Reset":"Active High/Active Low","Output":"Open Drain or Open Collector","Package":"Tube","Mounting Type":"Through Hole","Reset Timeout":"150ms Minimum","Package / Case":"8-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Threshold":"4.37V, 4.62V","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"8-PDIP","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.65","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.65000","currency":"USD"},{"qty":10,"price":"$9.62000","currency":"USD"},{"qty":25,"price":"$9.17240","currency":"USD"},{"qty":100,"price":"$7.96430","currency":"USD"},{"qty":250,"price":"$7.60632","currency":"USD"},{"qty":500,"price":"$6.93516","currency":"USD"},{"qty":1000,"price":"$6.04030","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3f673acf3f763be47d1254f5cfbe0ef5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does the 150 ms reset timeout mean for my design?","answer":"The 150 ms minimum reset timeout ensures the supervisor holds the processor in reset long enough for the power supply and clock oscillator to reach stable operating conditions before the system starts executing code. This is a standard duration for most microcontroller and DSP applications."},{"question":"What is the closest pin-compatible alternative to DS1231-20+?","answer":"The DS1231 family includes multiple threshold and timeout variants in the same 8-PDIP footprint. The DS1231-20+ is the version with 4.37 V / 4.62 V thresholds and a 150 ms timeout. Other family members differ in threshold voltages or timeout durations but share the same pinout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1231-20","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1231-20 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}}