{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"RE46C318S8F","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"RE46C318S8F","canonicalUrl":"https://icboms.com/microchip/RE46C318S8F","factsUrl":"https://icboms.com/api/mcp/products/RE46C318S8F","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology RE46C318S8F Horn Driver, Voltage Input, Voltage Output, 300 µA Supply, Surface Mount, 8-SOIC (0.154\", 3.90mm Width), Tube.","salesMarkdown":"## What the 300 µA supply current means for your design The RE46C318S8F draws 300 µA from the supply — this is the total operating current for the horn driver IC itself, not including the piezo load. In a battery-powered smoke or CO alarm, that quiescent draw sits well below the standby current of the typical 9 V battery, so the device can listen for an alarm condition continuously without draining the cell between events. The input and output are both voltage-type, meaning the driver accepts a logic-level trigger and outputs a voltage signal to drive a piezo transducer directly. No external amplifier stage is needed between the microcontroller GPIO and the horn element. ## Package and hand-solderability The 8-SOIC footprint is a standard JEDEC outline, so existing land patterns for generic SOIC-8 parts work without modification. The surface-mount package suits automated assembly lines as well as prototype boards — no through-hole variant exists, but the 8-SOIC is one of the most hobbyist-friendly SMD packages to work with on a breakout or perfboard. ## Temperature range and deployment context Rated for -10°C to 60°C ambient, the RE46C318S8F is specified for indoor commercial and residential environments — think smoke detectors, carbon monoxide alarms, and security system sounders.","metaTitle":"Microchip RE46C318S8F Horn Driver, 300 µA, 8-SOIC","metaDescription":"RE46C318S8F Horn Driver from Microchip Technology. Active, RoHS3 compliant, 300 µA supply, -10°C to 60°C, 8-SOIC. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Horn Driver","Package":"Tube","Input Type":"Voltage","Output Type":"Voltage","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"300 µA","Operating Temperature":"-10°C ~ 60°C","Supplier Device Package":"8-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.25","priceTiers":[{"qty":1,"price":"$1.25000","currency":"USD"},{"qty":25,"price":"$1.12480","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/89d8014be17050cae43516d5e584e300.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/RE46C318S8F/alternatives.json"},"ai":{"faq":[{"question":"What is RE46C318S8F's listed type and package?","answer":"The RE46C318S8F is a Horn Driver with voltage input and voltage output. It comes in an 8-SOIC surface-mount package (0.154\" body width, 3.90 mm) supplied in a tube."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/RE46C318S8F","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/RE46C318S8F 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}}