ATXMEGA128A1-CU - 128KB Flash 32MHz XMEGA A1 MCU 100-CBGA
N.º de pieza: ATXMEGA128A1-CU ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $12.85 | $128,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.95 | $4.975,00 |
| 1.000 | $9.1 | $9.100,00 |
ATXMEGA128A1-CU Descripción general
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (SRAM), non-volatile data storage (EEPROM), and programmable peripherals. Within the broader taxonomy, an MCU belongs to the category of embedded processors, sitting below microprocessors in system hierarchy and above discrete logic ICs in functional capability. The AVR XMEGA family specifically represents an 8/16-bit RISC architecture that targets low-power, deterministic, real-time embedded applications, balancing DSP-class peripheral integration with simple C-friendly tooling.
Key features of the ATXMEGA128A1-CU include 78 general-purpose I/O lines, eight 16-bit timer/counters with PWM and capture, a 16-bit RTC, four-channel DMA, programmable multi-level interrupt controller, USB full-speed device support via on-chip transceiver, multiple USART/SPI/TWI interfaces, an external bus interface, a 12-bit ADC and 12-bit DAC, AES and DES crypto accelerators, and an on-chip debug (OCD) system with PDI/DebugWIRE support. The 100-CBGA (9x9 mm, 0.8 mm pitch) package provides generous I/O and an exposed thermal structure suitable for industrial temperature ranges.
Architecturally, the device pairs an enhanced AVR RISC pipeline with Harvard-style busing and a peripheral event system that lets peripherals signal one another without CPU intervention - a hallmark of XMEGA's deterministic real-time design. The 1.6 V to 3.6 V wide operating range, multiple sleep modes, and on-chip voltage regulator make it well suited to battery-powered and industrial sensor nodes. Note that the ATXMEGA128A1 family is marked Not Recommended for New Designs (NRND) by Microchip in favor of the newer XMEGA AU series.
Typical applications include industrial control (HVAC, factory automation, motor drive controllers, building systems), hand-held battery-powered instrumentation, power tools, smart metering, optical and medical devices, large home appliances, and USB peripherals. Its crypto engines also make it a fit for embedded security nodes.
When designing with this part, allocate the 8 KB SRAM and 2 KB EEPROM budgets carefully and reserve at least 4 KB of the 128 KB Flash for a robust bootloader. The 100-CBGA package requires careful PCB pad design and reflow profiling; verify the 0.8 mm pitch footprint against Microchip's package drawing before fab release.
This page synthesizes distributor availability, same-package drop-in alternatives from the XMEGA family, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para ATXMEGA128A1-CU — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATXMEGA128A1-CU (mismo factor de forma y huella) — difiere en Core Architecture, Event System Channels, Flash Program Memory, Package, Timer/Counters.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATXMEGA128A1-CUR
✅ Sustitución directa✓ En stock
$7.15 / unidad
Ver hoja de datos →ATXMEGA64A1-CU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATXMEGA64A1U-CU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATXMEGA64A1U-CUR
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ATXMEGA64B1-CU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATXMEGA128A1-CU Valores máximos y características eléctricas
| Core Architecture | AVR (8/16-bit) enhanced RISC |
| Series | XMEGA A1 |
| Maximum CPU Speed | 32 MHz |
| Flash Program Memory | 128 KB (64K x 16) with read-while-write |
| Boot Code Section | 8 KB |
| SRAM | 8 KB |
| EEPROM | 2 KB |
| Supply Voltage Range | 1.6 V to 3.6 V |
| GPIO Lines | 78 |
| Timer/Counters | 8 x 16-bit (with PWM/capture) |
| DMA Channels | 4 |
| Event System Channels | 8 |
| ADC | 12-bit |
| DAC | 12-bit |
| RTC | 16-bit |
| Crypto Engines | AES + DES |
| USB | Full-speed device (on-chip transceiver) |
| External Bus Interface | Yes |
| Encapsulado | 100-CBGA (9x9 mm, 0.8 mm pitch) |
| Tipo de montaje | Surface Mount (BGA) |
| RoHS / Lead-free | Compliant / Pb-free |
| Recommended for New Designs | No - use XMEGA AU series |
Guía de configuración de pines de ATXMEGA128A1-CU 100-cbga (9x9 mm, 0.8 mm pitch)
Configuración de pines para ATXMEGA128A1-CU (encapsulado 100-cbga (9x9 mm, 0.8 mm pitch)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para ATXMEGA128A1-CU.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ATXMEGA128A1-CU es adecuado para 7 aplicacións: Industrial HVAC and Building Automation, Smart Metering and Energy Monitoring, USB Human Interface Devices (HID), Factory Automation and Motor Control, Hand-Held Battery-Powered Instrumentation, Medical and Optical Devices, Large Home Appliance Control Boards.
Industrial HVAC and Building Automation
The ATXMEGA128A1-CU's 32 MHz AVR core, 8-channel event system, and 12-bit ADC suit it to HVAC controllers where sensor sampling, fan/PWM drive, and Modbus/TWI communication must run deterministically. Its 128 KB Flash comfortably holds a BACnet or Modbus stack alongside a UI image and bootloader, and the 8 KB SRAM buffers sensor logs without external memory. Compared with discrete logic, the on-chip DMA offloads ADC-to-memory transfers, freeing the CPU for control loops. The 1.6-3.6 V range and multiple sleep modes support battery-backed thermostats and remote I/O nodes.
Recomendado
Smart Metering and Energy Monitoring
The 12-bit ADC with differential inputs and the AES crypto engine let the ATXMEGA128A1-CU sample current/voltage CT channels and authenticate AMR/AMI data locally. The 2 KB EEPROM is sized to hold calibration tables and tamper logs, while the 8 KB SRAM buffers 50/60 Hz waveform windows. Compared with a discrete DSP, the event system triggers ADC sampling synchronized to a zero-cross detect, eliminating software jitter. The 1.6-3.6 V operation is compatible with single-cell Li-ion or solar-supplied meter nodes.
Recomendado
USB Human Interface Devices (HID)
The ATXMEGA128A1-CU's on-chip USB full-speed transceiver and 78 GPIO make it a natural fit for USB HID controllers - keyboards, custom input panels, and lab tools. Single-cycle instructions and DMA keep USB polling jitter low, while 128 KB Flash absorbs USB stacks, vendor HID reports, and on-device macros. The 12-bit DAC drives audio cues without an external codec, and the AES engine secures firmware update authentication over USB.
Recomendado
Factory Automation and Motor Control
With eight 16-bit timer/counters, complementary PWM, and a 4-channel DMA, the ATXMEGA128A1-CU can drive BLDC and stepper stages with deterministic commutation timing. The event system synchronizes ADC sampling to PWM edges, achieving sub-microsecond current-loop latency for FOC applications. The 128 KB Flash fits a real-time control loop plus a CAN-like protocol over USART, and the 8 KB SRAM stages control tables. Compared with an FPGA-based controller, the XMEGA approach reduces BOM cost for low-to-mid power motor drives.
Recomendado
Hand-Held Battery-Powered Instrumentation
The ATXMEGA128A1-CU's low-power sleep modes, 1.6 V operation, and 12-bit ADC suit battery-powered test instruments where a graphical LCD or OLED display is driven over SPI. The DMA controller streams ADC samples to SRAM without waking the CPU, extending battery life. The 128 KB Flash holds calibration tables and user interface assets, while the on-chip AES engine protects logged data. Compared with an ARM Cortex-M0+, the XMEGA gives comparable performance with simpler tooling and predictable interrupt latency.
Recomendado
Medical and Optical Devices
The deterministic event system, on-chip AES/DES, and 12-bit ADC make the ATXMEGA128A1-CU suitable for portable medical peripherals - pulse oximeters, optical sensors, and lab analyzers. Firmware runs in 128 KB Flash and encrypted logs use the AES engine. The BGA package suits compact handhelds where PCB area is at a premium. Compared with newer ARM Cortex parts, the XMEGA still serves medical designs on long life-cycle platforms where re-validation cost outweighs the benefit of modern silicon.
Recomendado
Large Home Appliance Control Boards
Dishwasher, washing machine, and induction cooker control boards benefit from the ATXMEGA128A1-CU's 78 GPIO for driving relays, triac interfaces, and segment LCDs. The XMEGA LCD controller supports up to 4x40 segments without an external driver, simplifying BOM. The 128 KB Flash absorbs application code plus a safety monitor, and AES/DES support secures OEM pairing. Compared with 8-bit PIC alternatives, the XMEGA's DMA and event system reduce CPU load during motor and heater regulation.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATXMEGA128A1-CU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATXMEGA128A1-CUR | ATXMEGA64A1-CU | ATXMEGA64A1U-CU | ATXMEGA64A1U-CUR | ATXMEGA64B1-CU | ATXMEGA128A1-AU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-CBGA (9x9 mm) | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-CBGA (9x9 mm) - same | 100-TQFP (14x14 mm) - different footprint |
| Flash Memory | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 64 KB (-50%) | 64 KB (-50%) | 128 KB |
| SRAM | 8 KB | 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 | 2 KB |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating 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 | 1.6 V to 3.6 V |
| USB (Full-Speed) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes | Yes | Yes | Yes | Yes (on-chip transceiver) |
| Lifecycle Status | NRND | NRND | Obsolete | Obsolete | Obsolete | Obsolete | NRND |
Diferenciadores clave
- Largest on-chip Flash within the XMEGA A1 CBGA family (frente a ATXMEGA64A1-CU)
- Drop-in 100-CBGA footprint matches reel-packaged sibling (frente a ATXMEGA128A1-CUR)
- TQFP package option for hand-prototyping and low-density boards (frente a ATXMEGA128A1-AU)
Notas de diseño
Estimated: at 32 MHz and 3.3 V, the ATXMEGA128A1-CU draws roughly 20 mA active (estimated from typical XMEGA A1 figures), giving ~66 mW dissipation in CBGA package with theta_JA around 35 C/W on a 4-layer board - a junction rise of only ~2.3 C above ambient. The CBGA package conducts heat through balls and internal planes; ensure inner ground/power planes are continuous under the die for thermal spreading. In sleep modes (e.g., power-save), current drops to a few uA, simplifying battery thermal design.
The 100-CBGA package uses a 0.8 mm ball pitch with a 9x9 mm body. Use the manufacturer package drawing for land-pattern dimensions, including NSMD pads and a 0.4 mm solder mask opening. Fan-out traces between balls with 0.1 mm trace/space rules on inner layers. Apply via-in-pad only if the assembly house supports microvia stacks (typically 1+2+1 HDI). For hand-prototyping, use the 100-TQFP ATXMEGA128A1-AU variant instead.
Avoid these common pitfalls when designing with the ATXMEGA128A1-CU: (1) do not exceed 3.6 V on any pin, including during in-system programming peaks; (2) provide a 1 uF + 100 nF decoupling pair on every VCC/AVCC pin and place them within 5 mm; (3) the PDI clock pin is sensitive - keep its trace short and add a series 100 ohm resistor if the programmer cable is long; (4) when migrating from XMEGA A1 to B1 or C1 families, re-check peripheral mapping - timers and event channels differ; (5) the XMEGA A1 family is NRND, so qualify the alternate (e.g., XMEGA AU series) before committing to a new design.
Keep high-speed signals (USB D+/D-, external bus, SPI clock above 8 MHz) length-matched and routed over a continuous ground plane. The USB D+/D- traces should be 90 ohm differential, max 50 mm, with the 22-ohm series resistors placed close to the MCU pins. For external bus operation above 16 MHz, place series damping resistors near the driver pins and isolate the bus traces from analog ADC inputs by at least 3x trace width to limit digital crosstalk into ADC readings.
Información de cumplimiento
Pb-free and RoHS-compliant per Microchip product page; halogen-free status not explicitly stated in available data and marked 'unknown'. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade. Lifecycle: NRND - Microchip recommends the XMEGA AU series for new designs.
