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ATXMEGA128D3-MH
Microchip Technology
IC MCU 8/16BIT 128KB FLASH 64QFN
2506 Pcs New Original In Stock
AVR AVR® XMEGA® D3 Microcontroller IC 8/16-Bit 32MHz 128KB (64K x 16) FLASH 64-QFN (9x9)
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5.0 / 5.0
- (151 Ratings)
ATXMEGA128D3-MH
Product Overview
1251465
DiGi Electronics Part Number
ATXMEGA128D3-MH-DGManufacturer
Microchip Technology
ATXMEGA128D3-MH
Description
IC MCU 8/16BIT 128KB FLASH 64QFNInventory
2506 Pcs New Original In Stock
AVR AVR® XMEGA® D3 Microcontroller IC 8/16-Bit 32MHz 128KB (64K x 16) FLASH 64-QFN (9x9)
Quantity
Minimum 1
Minimum 1
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ATXMEGA128D3-MH Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Tray
Series
AVR® XMEGA® D3
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Core Processor
AVR
Core Size
8/16-Bit
Speed
32MHz
Connectivity
I2C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
50
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
EEPROM Size
2K x 8
RAM Size
8K x 8
Voltage - Supply (Vcc/Vdd)
1.6V ~ 3.6V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
64-QFN (9x9)
Package / Case
64-VFQFN Exposed Pad
Base Product Number
ATXMEGA128
Datasheet & Documents
Manuals
ATXMEGA D Manual
HTML Datasheet
ATXMEGA128D3-MH-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
3A991A2
HTSUS
8542.31.0001
Additional Information
Other Names
ATXMEGA128D3MH
Standard Package
260
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
迪吉電子的包裝品質一直保持高水準，價格優惠，讓我買得很放心。
de desembre 02, 2025
Rapidité d'expédition et qualité du support après-vente, un combo gagnant.
de desembre 02, 2025
Their attentive customer service makes me feel valued and confident in their products.
de desembre 02, 2025
The team is highly professional, making every interaction pleasant and efficient.
de desembre 02, 2025
The support I received was personalized, making me feel valued as a customer.
de desembre 02, 2025
Shipping is consistently fast, and their support team is proactive in ensuring customer satisfaction.
de desembre 02, 2025
Their honest and transparent approach builds long-term trust.
de desembre 02, 2025
Navigating their website is a breeze, enhancing my overall shopping satisfaction.
de desembre 02, 2025
Customers consistently praise their reliable and swift after-sales responses.
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Frequently Asked Questions (FAQ)
Can the ATXMEGA128D3-MH reliably operate in battery-powered applications with voltage fluctuations between 1.6V and 2.0V, and how does it handle brown-out conditions during startup?
Yes, the ATXMEGA128D3-MH is designed for low-voltage operation down to 1.6V, making it suitable for battery-powered systems. Its integrated brown-out detection (BOD) and power-on reset (POR) circuitry help ensure reliable startup and prevent erratic behavior under fluctuating supply conditions. For robust performance in low-voltage scenarios, it’s recommended to use BOD levels set via fuses—typically BODLEVEL2_45 (adjustable using internal settings)—and pair with low-ESR bypass capacitors near the VCC pins to stabilize transient drops. Be aware that CPU speed must scale with voltage; running at 32MHz near 1.6V may risk instability, so consider reducing clock speed or using internal PLL with voltage headroom for margin.
When replacing an ATmega1284P with the ATXMEGA128D3-MH in an industrial control board, what pin and peripheral compatibility issues should I expect?
While both the ATmega1284P and ATXMEGA128D3-MH share similar flash and pin count, they are not pin-compatible or register-compatible. The ATXMEGA128D3-MH uses a 64-QFN package with different pinout, I/O mapping, and peripheral addressing. Key integration risks include UART/I2C pin relocation, ADC channel remapping, and differences in PWM timer architecture. Additionally, the XMEGA’s peripheral event system and DMA support offer advanced features but require code redesign. For drop-in replacement, consider level-shifting, PCB layout changes, and full firmware revalidation. Migration tools like Atmel START can assist with peripheral configuration for the ATXMEGA128D3-MH.
How does the ATXMEGA128D3-MH compare to the ATSAMD21G18 in terms of real-time performance and power efficiency for sensor hub applications?
The ATXMEGA128D3-MH, based on the AVR XMEGA architecture, delivers deterministic real-time response with 32MHz max clock and minimal interrupt latency—ideal for time-critical sensor polling and PWM control. Compared to the ARM Cortex-M0+ based ATSAMD21G18, the ATXMEGA128D3-MH typically consumes less dynamic power at mid-range frequencies and avoids complex clock domain splitting. However, the ATSAMD21G18 offers better performance-per-MHz and lower idle current with advanced sleep modes. For applications needing precise ADC timing and direct GPIO control without RTOS overhead, the ATXMEGA128D3-MH is advantageous. Choose the ATXMEGA128D3-MH when avoiding flash wait states and ensuring peripheral synchronization are top priorities.
What are the key thermal and electrical design considerations for the exposed pad on the ATXMEGA128D3-MH’s 64-QFN package to ensure long-term reliability?
The exposed pad on the ATXMEGA128D3-MH’s 64-QFN (9x9) package must be soldered to a ground plane using thermal vias to ensure mechanical stability, EMI shielding, and thermal dissipation. A common mistake is under-sizing the thermal pad or using insufficient vias, leading to delamination or overheating under sustained peripheral load. Designers should use a 3x3 via array (0.3mm drill) under the pad, connected to internal ground planes. The pad must be tied to GND (not floating) to maintain core stability. Also, ensure PCB reflow profiles follow MSL3 guidelines (peak 260°C), as moisture absorption can lead to 'popcorning' during assembly, especially with the exposed thermal pad.
Is the ATXMEGA128D3-MH a viable long-term design-in choice given Microchip’s roadmap shift toward SAM and newer AVR families?
The ATXMEGA128D3-MH remains in active status with current stock availability and is suitable for new designs where proven reliability and mature toolchains are critical, especially in industrial and legacy-replacement applications. However, Microchip is emphasizing newer AVR-DX and SAM families with enhanced peripherals and security. If future-proofing and extended lifecycle support are key, evaluate migration paths to the AVR128DX68A, which offers similar pin count with event system enhancements and better toolchain support. For the ATXMEGA128D3-MH, secure at least 5–7 years of inventory planning and avoid designs requiring future scalability beyond 128KB flash or advanced communications like CAN-FD.
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ATXMEGA128D3-MH CAD Models
Microchip Technology ATXMEGA128D3-MH PCB symbols & footprints
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