{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BU7421SG-TR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BU7421SG-TR","canonicalUrl":"https://icboms.com/rohm/BU7421SG-TR","factsUrl":"https://icboms.com/api/mcp/products/BU7421SG-TR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM BU7421SG-TR, single CMOS op-amp, 90 kHz gain bandwidth, 0.05 V/µs slew rate, 8.5 µA supply, 1.7–5.5 V supply range, -40 to 105°C, SC-74A/SOT-753 package.","salesMarkdown":"## 90 kHz CMOS op-amp for low-frequency sensor conditioning The ROHM BU7421SG-TR is a single-channel CMOS operational amplifier designed for applications where power consumption and signal fidelity at low frequencies matter more than raw speed. Its 90 kHz gain-bandwidth product and 0.05 V/µs slew rate make it a natural fit for conditioning slow-moving signals from thermocouples, RTDs, strain gauges, or photodiodes — any sensor output that changes in the tens-of-hertz to single-kilohertz range. The 8.5 µA supply current per channel keeps the power budget tight, and the rail-to-rail output swing lets you drive an ADC input directly without an extra gain stage. ## Input bias and offset — DC accuracy for precision loops With a 1 pA typical input bias current and 1 mV input offset voltage, the BU7421SG-TR handles high-impedance sources like pH probes or piezoelectric sensors without loading the signal. The 8 mA output drive per channel is enough to swing a small relay or drive a 2 kΩ load to the rails, but not intended for heavy capacitive loads — keep the load capacitance under a few hundred picofarads unless you add a series resistor. ## Package and footprint — SOT-753 / SC-74A The small footprint suits dense PCB layouts, but the fine pitch means a stencil with good aperture ratio is needed for consistent solder paste deposition in reflow assembly.","metaTitle":"ROHM BU7421SG-TR CMOS Op-Amp, 90 kHz, 1.7–5.5 V","metaDescription":"ROHM BU7421SG-TR single CMOS op-amp: 90 kHz GBP, 8.5 µA supply, 1.7–5.5 V range, -40 to 105°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Slew Rate":"0.05V/µs","Mounting Type":"Surface Mount","Amplifier Type":"CMOS","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Current - Supply":"8.5µA","Number of Circuits":"1","Current - Input Bias":"1 pA","Operating Temperature":"-40°C ~ 105°C","Gain Bandwidth Product":"90 kHz","Voltage - Input Offset":"1 mV","Supplier Device Package":"5-SSOP","Current - Output / Channel":"8 mA","Voltage - Supply Span (Max)":"5.5 V","Voltage - Supply Span (Min)":"1.7 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.76","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.76000","currency":"USD"},{"qty":10,"price":"$0.66500","currency":"USD"},{"qty":25,"price":"$0.62440","currency":"USD"},{"qty":100,"price":"$0.50950","currency":"USD"},{"qty":250,"price":"$0.47328","currency":"USD"},{"qty":500,"price":"$0.40280","currency":"USD"},{"qty":1000,"price":"$0.32224","currency":"USD"},{"qty":3000,"price":"$0.29203","currency":"USD"},{"qty":6000,"price":"$0.28500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cb1d277425d2c7e2615c89739c57d6c0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BU7421SG-TR RoHS compliant?","answer":"Yes, the BU7421SG-TR is ROHS3 compliant per ROHM's official status."},{"question":"Does BU7421SG-TR have an equivalent or second-source part?","answer":"The closest functional peer is the ROHM BU7271SG-TR, which shares the same 90 kHz GBP, 0.05 V/µs slew rate, 1 pA input bias, and 8 mA output drive in an identical SOT-753 package. The BU7271SG-TR is specified as a general-purpose amplifier rather than CMOS type, but the parametric overlap is high enough to qualify as a drop-in alternative for most designs. For a wider bandwidth option, the BU7462NUX-TR offers 1 MHz GBP and 1 V/µs slew rate in a dual-channel package."},{"question":"What is the difference between BU7421SG-TR and BU7421SG?","answer":"The BU7421SG-TR is the tape-and-reel packaged variant of the same die. The suffix '-TR' indicates the reeled format for automated pick-and-place assembly, while the base BU7421SG typically ships in tube or bulk. Electrical characteristics and package (SOT-753) are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BU7421SG-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BU7421SG-TR 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}}