{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATUC128D3-A2UT","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"ATUC128D3-A2UT","canonicalUrl":"https://icboms.com/microchip/ATUC128D3-A2UT","factsUrl":"https://icboms.com/api/mcp/products/ATUC128D3-A2UT","rawCanonicalId":null},"summary":{"shortDescription":"Microchip AVR®32 UC3 D series, ATUC128D3-A2UT, 32-bit AVR core MCU, 48 MHz, 128 KB Flash, 16 KB SRAM, USB 2.0, I²C/SPI/UART, 51 GPIO, 8x10-bit ADC, 1.65V–3.6V, -40°C to 85°C, 64-LQFP (10x10 mm).","salesMarkdown":"## 48 MHz AVR32 core — what it buys you on the bus The ATUC128D3-A2UT is a 32-bit AVR32 UC3 D microcontroller from Microchip (formerly Atmel), clocked at 48 MHz with 128 KB of on-chip Flash and 16 KB of SRAM. The 32-bit AVR32 architecture delivers a single-cycle multiply and a compact instruction set, so the 48 MHz ceiling translates to roughly 48–50 MIPS in linear code — enough for USB audio streaming, real-time sensor fusion, or a modest RTOS stack without wait-state stalling on internal Flash. The part integrates a full-speed USB 2.0 device interface alongside I²C, SPI, and multiple UART/USART channels, plus an 8-channel 10-bit ADC and a DMA controller. This peripheral set targets applications such as industrial control panels, portable instrumentation, USB-to-serial bridges, and IoT edge nodes that need a single-chip MCU with wired connectivity. The supply range spans 1.65 V to 3.6 V, which lets the MCU run directly from a single Li-ion cell (3.0–4.2 V with an LDO) or a regulated 3.3 V rail without an extra voltage translator for the I/O. At the low end, 1.65 V operation matches the threshold of many 1.8 V-logic peripherals, saving a level-shifter on the SPI or UART lines.","metaTitle":"Atmel ATUC128D3-A2UT AVR32 MCU, 48 MHz, 128 KB Flash","metaDescription":"32-bit AVR32 UC3 D MCU, 48 MHz core, 128 KB Flash, 16 KB SRAM, USB + I²C/SPI/UART, -40°C to 85°C, 64-LQFP.","metaKeywords":null},"attributes":{"series":"AVR®32 UC3 D","packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"48MHz","Series":"AVR®32 UC3 D","Package":"Bulk","RAM Size":"16K x 8","Core Size":"32-Bit Single-Core","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"I²C, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"51","Core Processor":"AVR","Package / Case":"64-LQFP","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.24","priceTiers":[{"qty":58,"price":"$5.24000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/37051aa7b93ae846ca5b7bce9ed9918b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ATUC128D3-A2UT/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between ATUC128D3-A2UT and ATUC256D3-A2UT?","answer":"The primary difference is program memory density: the ATUC128D3 has 128 KB Flash, while the ATUC256D3 variant doubles that to 256 KB. Both share the same 48 MHz core, 16 KB SRAM, peripheral set, package, and temperature range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/ATUC128D3-A2UT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/ATUC128D3-A2UT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}