ATXMEGA128D4-MH - 32MHz AVR XMEGA D4 MCU 128KB Flash | Microchip
N.º da peça: ATXMEGA128D4-MH ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.82 | $5,82 |
| 10 | $5.24 | $52,40 |
| 100 | $4.65 | $465,00 |
| 500 | $4.18 | $2.090,00 |
| 1.000 | $3.72 | $3.720,00 |
ATXMEGA128D4-MH Visão geral
An AVR XMEGA microcontroller is a member of the 8/16-bit RISC microcontroller family based on the enhanced AVR architecture, sitting in the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC. XMEGA parts extend the classic ATmega line with higher-performance peripherals such as the event system, DMA, and AES/DES hardware acceleration, while retaining instruction-level compatibility with classic AVR cores. The D4 sub-series is the mid-density variant that balances Flash, SRAM, and pin count for human-interface, sensor hub, and motor control front-ends.
Key differentiating features include 128 KB Flash (64K x 16), 2 KB EEPROM, 8 KB SRAM, two USARTs (one with IrDA support), two TWI interfaces (I2C/SMBus compatible, dual address match), two SPI ports, a 16-bit CRC engine (CRC-CCITT), a 12-bit A/D converter, two 12-bit D/A converters, four 16-bit timer/counters, and an AES/DES crypto engine on selected variants. The integrated Peripheral Event System enables peripherals to communicate without CPU intervention, lowering latency and power.
Architecturally, the ATXMEGA128D4-MH uses a single-cycle 8/16-bit RISC core with hardware multiplier, five sleep modes down to sub-microamp standby, and a separate battery-backup domain for RTC operation. The 32 MHz peak throughput (with 2.7-3.6 V supply) and rich digital/mixed-signal peripherals make it well suited to applications where deterministic real-time response is required.
Typical applications include industrial sensor nodes, building automation controllers, battery-powered handheld instruments, USB device controllers (with external PHY), and low-power wireless sensor hubs. Designers typically select this part when they need substantial code space (128 KB), moderate RAM (8 KB), and a 44-pin VQFN footprint compatible with compact PCBs.
When designing with the ATXMEGA128D4-MH, note that the 1.6 V minimum supply requires careful brown-out design and that the 44-pin VQFN exposes a thermal pad that must be soldered to the PCB ground pour for electrical and thermal performance. Use the Atmel/Microchip XMEGA software framework (ASF) or Atmel Studio for peripheral drivers.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet alone, giving engineers a one-stop reference for sourcing and validating the ATXMEGA128D4-MH.
Alternativas drop-in para ATXMEGA128D4-MH — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATXMEGA128D4-MH (mesmo formato e footprint) — diferindo em Package, ADC, Program Memory (Flash), Core Architecture, DAC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATXMEGA64D4-MH
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATXMEGA128D4-MNR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATXMEGA128D4-MN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATXMEGA32D4-MHR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATXMEGA128D4-MH Classificações máximas e características elétricas
| Core Architecture | AVR (enhanced RISC), 8/16-bit |
| Series | AVR XMEGA D4 |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 128 KB (64K x 16) with read-while-write |
| EEPROM | 2 KB |
| SRAM | 8 KB |
| Supply Voltage (VCC) | 1.6 V to 3.6 V |
| I/O Pins | 34 programmable |
| Encapsulamento | 44-pin VQFN (7x7 mm) with exposed pad |
| Tipo de montagem | Surface Mount |
| USART | 2 (one with IrDA support) |
| TWI (I2C/SMBus) | 2 with dual address match |
| SPI | 2 |
| ADC | 12-bit, multi-channel |
| DAC | 2x 12-bit |
| Timers/Counters | 4 x 16-bit |
| Temperatura de operação | -40C to +85C (industrial) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
| Lifecycle Stage | ACTIVE (per distributor listing) |
Configuração de pinos do ATXMEGA128D4-MH
| Pino 1 | VCC — Digital supply voltage |
| Pino 2 | GND — Ground |
| Pino 3 | PA0 — Port A bit 0 / ADC0 input |
| Pino 4 | PA1 — Port A bit 1 / ADC1 input |
| Pino 5 | PA2 — Port A bit 2 / DAC0 output |
| Pino 6 | PA3 — Port A bit 3 / DAC1 output |
| Pino 7 | PA4 — Port A bit 4 |
| Pino 8 | PA5 — Port A bit 5 |
| Pino 9 | PA6 — Port A bit 6 |
| Pino 10 | PA7 — Port A bit 7 |
| Pino 11 | PB0 — Port B bit 0 |
| Pino 12 | PB1 — Port B bit 1 |
| Pino 13 | PB2 — Port B bit 2 |
| Pino 14 | PB3 — Port B bit 3 |
| Pino 15 | GND — Ground |
| Pino 16 | VCC — Digital supply voltage |
| Pino 17 | PC0 — Port C bit 0 |
| Pino 18 | PC1 — Port C bit 1 |
| Pino 19 | PC2 — Port C bit 2 |
| Pino 20 | PC3 — Port C bit 3 |
| Pino 21 | PC4 — Port C bit 4 |
| Pino 22 | PC5 — Port C bit 5 |
| Pino 23 | PC6 — Port C bit 6 |
| Pino 24 | PC7 — Port C bit 7 |
| Pino 25 | PD0 — Port D bit 0 |
| Pino 26 | PD1 — Port D bit 1 |
| Pino 27 | PD2 — Port D bit 2 |
| Pino 28 | PD3 — Port D bit 3 |
| Pino 29 | PD4 — Port D bit 4 |
| Pino 30 | PD5 — Port D bit 5 |
| Pino 31 | PD6 — Port D bit 6 |
| Pino 32 | PD7 — Port D bit 7 |
| Pino 33 | AVCC — Analog supply voltage |
| Pino 34 | AREF — ADC reference voltage |
| Pino 35 | GND — Ground (analog) |
| Pino 36 | PE0 — Port E bit 0 |
| Pino 37 | PE1 — Port E bit 1 |
| Pino 38 | PE2 — Port E bit 2 |
| Pino 39 | PE3 — Port E bit 3 |
| Pino 40 | RESET — Reset input (active low) |
| Pino 41 | PR0 — Port R bit 0 / PDI clock |
| Pino 42 | PR1 — Port R bit 1 / PDI data |
| Pino 43 | TOSC1 — RTC oscillator input |
| Pino 44 | TOSC2 — RTC oscillator output |
Aplicações típicas
ATXMEGA128D4-MH é adequado para 6 aplicaçãos: Industrial Sensor Node, Battery-Powered Handheld Instrument, Building Automation Controller, USB Device Controller (with external PHY), Low-Power Wireless Sensor Hub, Human-Machine Interface (HMI) Front Panel.
Industrial Sensor Node
The ATXMEGA128D4-MH fits industrial 4-20 mA loop-powered sensor nodes because its 1.6 V minimum VCC lets it run directly from rectified loop current, while the 128 KB Flash holds MODBUS, HART, or IO-Link communication stacks. The four-channel Peripheral Event System lets ADC conversions trigger DMA transfers without waking the CPU, dropping average active current. With 32 MIPS at 32 MHz the controller can complete a measurement cycle in microseconds and return to one of five sleep modes below 1 mA. According to the Microchip XMEGA D4 datasheet, the 12-bit ADC with internal reference and gain stage handles 0-2.4 V sensor outputs directly, eliminating external amplifiers in many bridges.
Recomendado
Battery-Powered Handheld Instrument
Portable handheld instruments such as digital multimeters, environmental loggers, and medical point-of-care devices benefit from the ATXMEGA128D4-MH's 8 KB SRAM (sufficient for 2 kpoint FFT buffers) and its integrated 12-bit DAC pair for stimulus or audio feedback. The 128 KB Flash accommodates USB device stacks, menu firmware, and calibration data while the RTC battery backup domain keeps the time-of-day clock running when the main battery is removed. Five sleep modes - including a 100 nA Power-Down mode - allow multi-year battery life when duty-cycled appropriately. Compared with ARM Cortex-M competitors, the XMEGA's deterministic two-cycle interrupt latency simplifies real-time user-interface handling.
Recomendado
Building Automation Controller
Building automation controllers (lighting, HVAC, blind control, KNX) typically need many PWM channels and a rich mix of digital interfaces - an exact match for the ATXMEGA128D4-MH. The four 16-bit timers deliver 16 PWM outputs at up to 16-bit resolution for smooth LED dimming and motor control, while the two USARTs handle RS-485 or KNX twisted-pair transceivers. The 34 programmable I/Os are sufficient for multi-button wall panels and LED feedback rings, and the DMA controller offloads UART-to-memory transfers for protocol parsing. The -40C to +85C industrial operating range covers HVAC equipment rooms and unheated attics.
Recomendado
USB Device Controller (with external PHY)
The ATXMEGA128D4-MH can act as a low-speed or full-speed USB device when paired with an external USB transceiver PHY such as the TUSB1106 or a discrete DP/DN driver pair. The 32 MHz system clock and 2 KB EEPROM give ample headroom for CDC, HID, or vendor-class USB stacks, and the Peripheral Event System routes USB SOF packets to timers for precise isochronous handling. However, for designs that prefer integrated USB, the sibling ATXMEGA128A4U-AU combines identical memory with an on-chip full-speed USB 2.0 device controller, eliminating the external PHY. Choose the D4-MH when you have an external transceiver for cost reasons or when USB is a secondary interface.
Recomendado
Low-Power Wireless Sensor Hub
As a sensor-hub MCU front-ending a sub-GHz or 2.4 GHz radio module (such as MRF24J40, SAMD20 + AT86RF233, or external LoRa), the ATXMEGA128D4-MH supplies the protocol stack space and deterministic timing that battery-powered wireless nodes require. The 128 KB Flash holds IPv6/6LoWPAN or proprietary mesh stacks, while the 8 KB SRAM accommodates packet buffers. Sleep currents under 1 mA and RTC-from-battery-backup preserve battery life between transmissions. The 44-pin VQFN gives 34 I/Os - more than enough for multiple SPI sensor ports, an OLED display, and a user-interface button matrix.
Recomendado
Human-Machine Interface (HMI) Front Panel
Front-panel HMI boards - the kind that drive a 320x240 TFT, scan a 4x4 key matrix, and play short audio cues - are an ideal application for the ATXMEGA128D4-MH. The two 12-bit DAC channels can drive an audio amplifier for click-and-beep feedback, the DMA controller can pump SPI display data without CPU intervention, and the 128 KB Flash holds the menu graph and localization tables. The 1.6-3.6 V supply lets the MCU share its regulator with the TFT backlight driver, simplifying the power tree. Compared with an 8-bit ATmega equivalent, the XMEGA's 32 MIPS and richer interrupt controller deliver noticeably snappier UI response.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATXMEGA128D4-MH — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATXMEGA64D4-MH | ATXMEGA128D4-MNR | ATXMEGA128D4-MN | ATXMEGA32D4-MHR | ATXMEGA128A4U-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin VQFN (7x7 mm) | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin TQFP - different package |
| Flash Memory | 128 KB | 64 KB | 128 KB | 128 KB | 32 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
| USB Support | No (requires external PHY) | No (external PHY) | No (external PHY) | No (external PHY) | No (external PHY) | Yes (USB 2.0 FS integrated) |
Principais diferenciais
- Largest Flash in the 44-pin D4 family (vs ATXMEGA64D4-MH)
- Full peripheral richness including AES crypto (vs ATXMEGA32D4-MHR)
- No integrated USB keeps power budget tight (vs ATXMEGA128A4U-AU)
Notas de projeto
The ATXMEGA128D4-MH operates from 1.6 V to 3.6 V, but the 32 MHz top clock speed is only available above 2.7 V. Use a low-dropout regulator such as MCP1643 with a 1 uF input and 4.7 uF output ceramic capacitor for noise immunity. Decouple each VCC pin with a 100 nF X7R ceramic placed within 3 mm of the pin, and tie the exposed thermal pad to a solid ground pour with at least 8 thermal vias for both electrical grounding and heat dissipation during sustained 32 MHz operation.
Keep the 32 MHz crystal traces short and symmetric, with the load capacitors (typically 12-22 pF) placed directly across XTAL1/XTAL2. Route the analog AVCC/AREF traces away from digital switching signals - if the on-chip ADC is used at 12-bit resolution, add a small ferrite bead or 10 ohm resistor between VCC and AVCC and decouple AVCC with a 100 nF plus 10 uF capacitor. The exposed thermal pad must be soldered to the PCB; an unsoldered pad causes erratic resets and reduced thermal performance.
Three pitfalls catch first-time XMEGA users: (1) the XMEGA uses the PDI programming interface, not the classic AVR ISP - use an Atmel-ICE or AVR Dragon with the 2-wire PDI header (PDI_CLK on PR0, PDI_DATA on PR1); (2) fuses configure clock source and brown-out thresholds - forgetting to program the BOD level can lead to flash corruption below 1.6 V during slow power-down; (3) the DMA controller uses dedicated descriptor tables in SRAM - failing to initialize them causes silent peripheral failures. Always import the ASF example projects as a starting point and verify the XMEGA errata sheet for the specific die revision.
When driving long cables (RS-485, DMX, CAN) from the XMEGA's GPIO, source-terminate the line near the driver with the characteristic impedance (typically 120 ohm for CAN, 100 ohm for RS-485). The XMEGA's GPIO drive strength is configurable - use full-strength (10 mA) only when needed, otherwise select reduced drive (2 mA) to limit slew rate and EMI. For SPI peripherals above 10 MHz, add a 33 ohm series resistor at the SCK source to dampen reflections on long PCB traces.
Informações de conformidade
RoHS compliant per Microchip product page. Industrial -40C to +85C operating range; not AEC-Q100 qualified (automotive applications require the ATxmega128D4-AU automotive grade variant). Microchip publishes full conflict-minerals declaration on its corporate responsibility site.
