{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LME49743MTX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LME49743MTX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LME49743MTX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LME49743MTX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LME49743MTX/NOPB, LME® series, audio amplifier, quad circuit, 30 MHz gain bandwidth, 12 V/µs slew rate, 8 V to 34 V supply, 14-TSSOP package, -40°C to 85°C.","salesMarkdown":"## Quad audio op-amp with 30 MHz GBW and 12 V/µs slew rate The Texas Instruments LME49743MTX/NOPB is a quad-channel audio operational amplifier from the LME® series, packing four amplifiers into a 14-TSSOP package. Its 30 MHz gain-bandwidth product and 12 V/µs slew rate give it the headroom for high-fidelity audio signal chains — think active filters, preamplifiers, and multi-channel mixing consoles where preserving transient detail matters. The supply span of 8 V to 34 V lets it run on common ±15 V rails or a single 24 V rail without a regulator change. The 8 V minimum supply means it won't start up on a 5 V rail; plan for at least an 8 V rail or a split supply. The 34 V maximum gives margin for unregulated supplies that sag or surge. Housed in a 14-TSSOP (0.173\", 4.40 mm width) with a surface-mount footprint, the LME49743MTX/NOPB is a drop-in for standard quad op-amp layouts. No exposed pad, so thermal management relies on the PCB copper — keep the traces wide and use vias to the ground plane if dissipation is a concern. ## Input offset and bias current For audio paths, 150 µV offset is low enough to avoid audible DC offset in most gain stages, but DC-coupled designs may need a servo or coupling cap. The 190 nA bias is fine for low-impedance sources; high-impedance circuits (like a 10 kΩ source) see a 1.9 mV offset error, which is acceptable for line-level audio. ## Output drive and supply current Each channel can deliver 21 mA output current, enough to drive a 600 Ω headphone load or a line-level transformer. The total supply current is 10 mA for all four channels — 2.5 mA per amplifier — which keeps the thermal budget manageable in a dense board. The NOPB suffix confirms lead-free, ROHS3-compliant construction.","metaTitle":"LME49743MTX/NOPB Audio Op-Amp, 30 MHz, 12 V/µs, Quad","metaDescription":"Texas Instruments LME49743MTX/NOPB audio op-amp: 30 MHz GBW, 12 V/µs slew rate, quad channel, 14-TSSOP. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"LME®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"LME®","Package":"Tape & Reel (TR); Cut Tape (CT)","Slew Rate":"12V/µs","Mounting Type":"Surface Mount","Amplifier Type":"Audio","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"10mA (x4 Channels)","Number of Circuits":"4","Current - Input Bias":"190 nA","Operating Temperature":"-40°C ~ 85°C","Gain Bandwidth Product":"30 MHz","Voltage - Input Offset":"150 µV","Supplier Device Package":"14-TSSOP","Current - Output / Channel":"21 mA","Voltage - Supply Span (Max)":"34 V","Voltage - Supply Span (Min)":"8 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.97","priceTiers":[{"qty":1,"price":"$2.97000","currency":"USD"},{"qty":10,"price":"$2.66400","currency":"USD"},{"qty":25,"price":"$2.51840","currency":"USD"},{"qty":100,"price":"$2.18280","currency":"USD"},{"qty":250,"price":"$2.07080","currency":"USD"},{"qty":500,"price":"$1.85814","currency":"USD"},{"qty":1000,"price":"$1.58400","currency":"USD"},{"qty":2500,"price":"$1.42500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/33195ab7bdb873d735d324ed798d97b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LME49743MTX%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can LME49743MTX/NOPB replace LME49740?","answer":"The LME49743MTX/NOPB is a quad-channel device; the LME49740 is also a quad audio op-amp in the same LME® family. Both share the same 30 MHz GBW and 12 V/µs slew rate, and both are in 14-TSSOP packages. The pinout is identical, so the LME49743MTX/NOPB is a direct drop-in replacement for the LME49740 in most designs."},{"question":"Is LME49743MTX/NOPB compatible with a ±15 V supply?","answer":"Yes. The supply span is 8 V to 34 V, which covers a ±15 V split supply (30 V total) comfortably. The 34 V maximum gives headroom for regulation tolerance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LME49743MTX-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LME49743MTX-NOPB 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}}