{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"R5F21182NP#U0","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"R5F21182NP~4U0","canonicalUrl":"https://icboms.com/renesas/R5F21182NP~4U0","factsUrl":"https://icboms.com/api/mcp/products/R5F21182NP%23U0","rawCanonicalId":null},"summary":{"shortDescription":"Renesas R8C/1x/18 16-Bit MCU, R5F21182NP#U0, 20MHz, 8KB FLASH, 512 x 8 RAM, 13 I/O, 28-HWQFN (5x5), Tray.","salesMarkdown":"## 20 MHz R8C core, 8 KB flash — the firmware budget The R5F21182NP#U0 is a 16-bit R8C microcontroller from the R8C/1x/18 series, clocked at 20 MHz with 8 KB of program flash and 512 bytes of RAM. The 8 KB flash is the total user space — the bootloader does not carve out a hidden sector, so what you see is what you get for the application image. The 512-byte RAM split means the stack and interrupt vectors compete with the data buffer: a deep call tree or a large interrupt service routine will push into the 256-byte boundary quickly. ## Peripheral set and I/O count — what connects where Thirteen general-purpose I/O pins share the package with a SIO and a UART/USART serial interface. The on-chip peripherals include a voltage detect circuit, a power-on reset, a watchdog timer, and an LED drive capability — the POR and voltage detect eliminate the external supervisor IC for most low-cost designs. The WDT can be configured to generate a reset or an interrupt, which matters for safety-critical loops where a timeout must not immediately reset the system. The pad is the primary ground return for the core; a missing via under the pad lifts the die temperature above the rated junction limit in continuous operation. ## Active production, ROHS3 — no last-time-buy pressure The 8 KB flash and 512-byte RAM limit the application scope to simple control loops, sensor polling, or communication bridges — not a complex RTOS. For a BOM that needs a 16-bit core with serial I/O and internal oscillator, this part fits without a board spin for an external clock source.","metaTitle":"R5F21182NP#U0 R8C/1x/18 16-Bit MCU, 20MHz, 8KB Flash","metaDescription":"R5F21182NP#U0 16-bit R8C MCU, 20MHz, 8KB flash, 512B RAM, -20 to +85°C, Active production. ROHS3 compliant. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":"R8C/1x/18","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"20MHz","Series":"R8C/1x/18","Package":"Tray","RAM Size":"512 x 8","Core Size":"16-Bit","Peripherals":"LED, POR, Voltage Detect, WDT","Connectivity":"SIO, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"13","Core Processor":"R8C","Package / Case":"28-WFQFN Exposed Pad","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"8KB (8K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-20°C ~ 85°C (TA)","Supplier Device Package":"28-HWQFN (5x5)","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.69","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.69000","currency":"USD"},{"qty":10,"price":"$4.21300","currency":"USD"},{"qty":25,"price":"$3.98240","currency":"USD"},{"qty":80,"price":"$3.45150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b149093821706b6a57a0112cb03e1cfe.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/R5F21182NP~4U0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/R5F21182NP~4U0 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}}