{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2903HDT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM2903HDT","canonicalUrl":"https://icboms.com/stmicroelectronics/LM2903HDT","factsUrl":"https://icboms.com/api/mcp/products/LM2903HDT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM2903HDT, dual general-purpose comparator, open-collector rail-to-rail output, 2V to 36V supply range, -40°C to 150°C operating temperature, 8-SOIC package.","salesMarkdown":"## Dual comparator that ran hot — and now runs scarce What set it apart from the standard LM2903 was its 150°C maximum junction temperature — 25°C higher than the commercial-grade parts, making it a fit for engine-bay electronics, downhole tools, or industrial ovens where the ambient air hits triple digits. Input bias current maxes at 0.25µA at 5V, and input offset voltage is 7mV max at 30V — typical numbers for a general-purpose comparator, but the wide supply and temperature range are the selection drivers. The closest pin-compatible alternative within the LM2903 family is the LM2903DT, but that part is rated to 105°C, not 150°C. Verify the ambient temperature in your application before substituting. ## Package and pin-compatibility note Quiescent current is 2.5mA max for both comparators, and each output can sink 16mA at 5V — enough to drive a logic input or an LED indicator directly.","metaTitle":"STMicroelectronics LM2903HDT Dual Comparator, -40°C to 150°C","metaDescription":"STMicroelectronics LM2903HDT dual general-purpose comparator. Open-collector rail-to-rail output, 2V to 36V supply, -40°C to 150°C operating range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","Type":"General Purpose","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Hysteresis":"-","Output Type":"Open-Collector, Rail-to-Rail","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","CMRR, PSRR (Typ)":"-","Number of Elements":"2","Base Product Number":"LM2903","Operating Temperature":"-40°C ~ 150°C","Current - Output (Typ)":"16mA @ 5V","Propagation Delay (Max)":"-","Supplier Device Package":"8-SOIC","Current - Quiescent (Max)":"2.5mA","Current - Input Bias (Max)":"0.25µA @ 5V","Voltage - Input Offset (Max)":"7mV @ 30V","Voltage - Supply, Single/Dual (±)":"2V ~ 36V, ±1V ~ 18V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/da4b81d4c51755d6712eb929f96e33f8.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2903HDT/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM2903HDT?","answer":"There is no official direct replacement from STMicroelectronics that matches the 150°C temperature grade. The standard LM2903DT is pin-compatible but rated to 105°C, not 150°C. If your application requires the full 150°C rating, you may need to evaluate comparators from other manufacturers or accept the LM2903HDT sourced through the surplus channel. Confirm the thermal requirements of your board before substituting."},{"question":"What is the operating temperature of LM2903HDT?","answer":"This extended upper limit (compared to the standard 105°C or 125°C) is the key differentiator of this variant."},{"question":"What is the difference between LM2903HDT and LM2903DT?","answer":"The primary difference is the operating temperature range. The LM2903HDT is rated to 150°C, while the LM2903DT is rated to 105°C. Both are dual general-purpose comparators in the same 8-SOIC package with the same pinout, supply range, and output type. The 'H' in the suffix denotes the higher temperature grade."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM2903HDT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM2903HDT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}