{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMH6645MFX","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMH6645MFX","canonicalUrl":"https://icboms.com/texas-instruments/LMH6645MFX","factsUrl":"https://icboms.com/api/mcp/products/LMH6645MFX","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMH6645MFX, LMH® series, voltage-feedback op-amp, single circuit, 55 MHz gain bandwidth, 22 V/µs slew rate, rail-to-rail output, 2.5 V to 12 V supply, SOT-23-5 package, -40°C to 85°C.","salesMarkdown":"## What this LMH6645MFX is and what it does It delivers a rail-to-rail push-pull output stage, so it can swing close to both supply rails without an external pull-up — useful when you are driving an ADC input or a cable directly. The supply span runs from 2.5 V up to 12 V, which covers the common 5 V and 3.3 V single-rail designs you see in portable instrumentation and sensor front-ends. Quiescent current sits at 725 µA, a reasonable trade-off for the bandwidth it offers; you are not burning battery charge just to get 55 MHz of small-signal bandwidth. The SOT-23-5 footprint (SC-74A) is a compact surface-mount package that fits into tight layouts — think two-layer sensor boards or handheld tools where every square millimetre counts. Input bias current is 650 nA (typical), and input offset voltage is 1 mV (typical) — numbers that matter when you are amplifying a millivolt-level transducer signal and cannot afford a DC error that swamps the reading. Each channel can source or sink 20 mA, enough to drive a modest headphone line or a 50-ohm back-terminated video load. ## Lifecycle and sourcing posture For RoHS-compliant builds, check the lead-free suffix variants in the LMH6645 family.","metaTitle":"LMH6645MFX Op-Amp, 55 MHz, 22 V/µs, Rail-to-Rail, SOT-23-5","metaDescription":"TI LMH6645MFX voltage-feedback op-amp: 55 MHz GBP, 22 V/µs slew rate, rail-to-rail output, 2.5 V to 12 V supply. SOT-23-5.","metaKeywords":null},"attributes":{"series":"LMH®","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"LMH®","Package":"Bulk","Slew Rate":"22V/µs","Output Type":"Push-Pull, Rail-to-Rail","Mounting Type":"Surface Mount","-3db Bandwidth":"55 MHz","Amplifier Type":"Voltage Feedback","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Current - Supply":"725µA","Number of Circuits":"1","Current - Input Bias":"650 nA","Operating Temperature":"-40°C ~ 85°C","Gain Bandwidth Product":"55 MHz","Voltage - Input Offset":"1 mV","Supplier Device Package":"SOT-23-5","Current - Output / Channel":"20 mA","Voltage - Supply Span (Max)":"12 V","Voltage - Supply Span (Min)":"2.5 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.92","stockQuantity":0,"priceTiers":[{"qty":328,"price":"$0.92000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5c9c5457771957a46e2a88f67a2c8d7e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can LMH6645MFX be used in single-supply 5 V applications?","answer":"Yes. The supply voltage range is 2.5 V to 12 V, so a single 5 V rail is well within the operating window. The rail-to-rail output stage lets the signal swing close to both rails without external biasing."},{"question":"What are the best alternatives or equivalents for LMH6645MFX?","answer":"A close functional peer is the TLV9351IDCKR from TI — a single-channel, rail-to-rail general-purpose op-amp with a 3.5 MHz bandwidth and 20 V/µs slew rate, in the same SOT-23-5 footprint. If you need the full 55 MHz bandwidth, the LMH6645MFX remains the direct fit; the TLV9351 is a lower-speed, lower-power alternative for less demanding signal paths."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMH6645MFX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMH6645MFX 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}}