{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AVR64DB28T-I/SS","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"AVR64DB28T-I-SS","canonicalUrl":"https://icboms.com/microchip/AVR64DB28T-I-SS","factsUrl":"https://icboms.com/api/mcp/products/AVR64DB28T-I%2FSS","rawCanonicalId":null},"summary":{"shortDescription":"Microchip AVR® DB series AVR64DB28T-I/SS, 8-bit AVR MCU, 64KB Flash, 8KB SRAM, 512B EEPROM, 24 MHz, 1.8-5.5V, 21 I/O, I²C/SPI/UART, internal oscillator, industrial -40 to 85°C, 28-SSOP.","salesMarkdown":"## Core features and memory map for firmware planning The Microchip AVR64DB28T-I/SS is an 8-bit AVR microcontroller built around the AVR core running at up to 24 MHz. The 512-byte EEPROM array endurance is rated for 100k write/erase cycles typical for the AVR DB family, which suits wear-leveled parameter storage in a ten-year product life. The 8 KB SRAM holds the stack and runtime data for typical control loops; if your application uses a TCP/IP stack or large lookup tables, budget carefully — this is not a memory-rich part. The 64 KB Flash should be enough for moderate firmware with bootloader support; the AVR DB series supports self-programming for in-application updates. ## Package and I/O: 28-pin SSOP with 21 GPIOs The 28-SSOP package (5.30 mm wide, 0.209\" pitch) is a compact surface-mount body suited for two-layer boards where routing density is moderate. Of the 28 pins, 21 are available as general-purpose I/O. The remaining pins serve power, ground, and the programming/debug interface (UPDI). The 21 I/O count limits your external peripherals — if you need more than 21 signals, step up to a 44-pin TQFP variant in the same AVR DB family. The SSOP footprint is compatible with standard 0.65 mm pitch soldering processes. MSL level is 3 out of the bag — bake before reflow if the moisture-barrier bag has been open longer than 168 hours at <30 °C / 60% RH. ## Peripherals and analog integration The ADC is adequate for reading multiple analog sensors (thermistors, potentiometers, current-sense resistors) through a multiplexer; the DAC can generate a simple analog output voltage without an external converter. The part also includes a PWM module, brown-out detect, power-on reset, and watchdog timer — the usual complement for standalone embedded control. It is ROHS3 compliant. There is no official second source listed in the AVR DB family, but the pin-compatible AVR32DD28T-I/SS (same 28-SSOP package, 32 KB Flash, 24 MHz) offers a drop-in alternative with fewer Flash and SRAM resources for cost-sensitive BOM lines.","metaTitle":"AVR64DB28T-I/SS AVR 8-bit MCU, 64KB Flash, 24 MHz, 28-SSOP","metaDescription":"Microchip AVR64DB28T-I/SS 8-bit MCU with 64KB Flash, 8KB RAM, 512B EEPROM, 24 MHz, -40 to 85°C, 28-SSOP.","metaKeywords":null},"attributes":{"series":"AVR® DB","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Microchip Technology","Speed":"24MHz","Series":"AVR® DB","Package":"Tape & Reel (TR); Cut Tape (CT)","RAM Size":"8K x 8","Core Size":"8-Bit","EEPROM Size":"512 x 8","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"21","Core Processor":"AVR","Package / Case":"28-SSOP (0.209\\\", 5.30mm Width)","Product Status":"Active","Data Converters":"A/D 9x12b; D/A 1x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"AVR64DB28","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"28-SSOP","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0900","priceTiers":[{"qty":1,"price":"$2.09000","currency":"USD"},{"qty":25,"price":"$1.90920","currency":"USD"},{"qty":100,"price":"$1.75500","currency":"USD"},{"qty":2100,"price":"$1.75500","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/AVR64DB28T-I%2FSS/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent or second-source for the AVR64DB28T-I/SS?","answer":"Microchip offers the AVR32DD28T-I/SS as a pin-compatible alternative in the same 28-SSOP package and 24 MHz speed grade. The AVR32DD reduces Flash to 32 KB and SRAM to 4 KB, and adds IrDA and LINbus connectivity. It is not a direct capacity-for-capacity replacement but can serve as a second source for designs that can trim memory usage. For a higher-memory drop-in, the AVR64DB family includes 44-pin and 48-pin TQFP variants."},{"question":"How do I program the AVR64DB28T-I/SS?","answer":"The AVR64DB28T-I/SS uses Microchip's Unified Program and Debug Interface (UPDI), a single-pin programming and debug protocol. You need a programmer such as the Microchip Snap, Atmel-ICE, or a third-party UPDI adapter (e.g., a USB-to-serial converter running the jtag2updi firmware). The UPDI pin is dedicated and does not conflict with the 21 GPIOs. The part supports self-programming via the bootloader section of Flash, allowing firmware updates over UART or I²C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/AVR64DB28T-I-SS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/AVR64DB28T-I-SS 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}}