{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM385BYM-1.2/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM385BYM-1.2-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM385BYM-1.2-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM385BYM-1.2%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM385BYM-1.2/NOPB, shunt voltage reference, fixed 1.235 V output, ±1% tolerance, 20 mA output, 50 ppm/°C drift, 8-SOIC surface mount, 0°C to 70°C.","salesMarkdown":"## 1.235 V shunt reference — what the ±1% tolerance buys you The Texas Instruments LM385BYM-1.2/NOPB is a micropower shunt voltage reference that delivers a fixed 1.235 V output with a ±1% initial tolerance. It is designed for precision analog circuits — ADC/DAC references, comparator thresholds, and regulator feedback dividers — where a stable, low-drift voltage is needed without a series regulator. The 50 ppm/°C temperature coefficient keeps the output within roughly 6 mV across the full 0°C to 70°C range, which is tight enough for 8- to 10-bit systems but not for 12-bit+ designs without calibration. ## 20 mA output, 15 µA cathode — biasing the shunt As a shunt reference, the LM385BYM-1.2/NOPB sinks current through the cathode to regulate the output voltage. The 20 mA maximum output current sets the load-driving ceiling; the 15 µA minimum cathode current defines the bias resistor value needed to keep the device in regulation at no load. For a typical 5 V supply rail, a 1.8 kΩ bias resistor delivers about 2 mA to the reference — well above the 15 µA floor and leaving headroom for the load. ## 8-SOIC package — rework-friendly footprint No hidden pads, no underfill needed. The 1.27 mm pitch gives good clearance for hand-soldering touch-ups.","metaTitle":"Texas Instruments LM385BYM-1.2/NOPB Shunt Voltage Reference","metaDescription":"Texas Instruments LM385BYM-1.2/NOPB shunt voltage reference, fixed 1.235 V output, ±1% tolerance, 50 ppm/°C drift, 20 mA output, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"20 mA","Current - Supply":"-","Current - Cathode":"15 µA","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"60µVrms","Operating Temperature":"0°C~70°C(TA)","Supplier Device Package":"8-SOIC","Temperature Coefficient":"50ppm/°C","Voltage - Output (Min/Fixed)":"1.235V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7f09f8fcb08c7e00d968fb30b12cc3d5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM385BYM-1.2%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is the LM385BYM-1.2/NOPB a drop-in replacement for the LM385BYM-1.2?","answer":"The LM385BYM-1.2/NOPB is the RoHS-compliant version of the LM385BYM-1.2. Electrical specifications — 1.235 V output, ±1% tolerance, 20 mA output, 50 ppm/°C drift — are identical. The package (8-SOIC) and pinout are the same, so it is a direct drop-in replacement for the non-RoHS variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM385BYM-1.2-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/LM385BYM-1.2-NOPB 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}}