ATMEGA2560-16AUA0 - 8-bit AVR MCU 16MHz 256KB | Microchip
料号： ATMEGA2560-16AUA0 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.21 | $11.21 |
| 10 | $10.65 | $106.50 |
| 100 | $10.08 | $1,008.00 |
| 500 | $9.58 | $4,790.00 |
| 1,000 | $9.1 | $9,100.00 |
ATMEGA2560-16AUA0 概述
An 8-bit AVR microcontroller is a single-chip computer that integrates a Harvard-architecture RISC CPU, program memory, data memory, and peripherals such as UARTs, timers, ADCs, and SPI/I2C interfaces. Within the power-management and embedded-control hierarchy, it sits as the system brain in microcontroller ICs, executing powerful instructions in a single clock cycle to deliver throughputs approaching 1 MIPS per MHz, letting designers optimize power consumption against processing speed.
Key features include the 256 KB in-system self-programmable FLASH, the largest of the ATmega640/1280/2560 family, plus 86 general-purpose I/O lines and 32 general-purpose working registers. Six flexible timer/counters with compare modes and PWM, along with multiple hardware serial interfaces, reduce external component count in multi-channel control designs.
Architecturally, the AVR enhanced RISC core pairs a large register file directly with the ALU, so a single instruction accesses two independent registers in one clock cycle. This eliminates the accumulator bottleneck of classic 8-bit architectures and gives the ATMEGA2560-16AUA0 deterministic, single-cycle execution suitable for real-time control loops. The 100-TQFP (14x14 mm) package exposes all 86 GPIO plus power, ground, reset, and crystal pins on a 0.5 mm pitch footprint shared across the ATmega640/1280/2560 family.
Typical applications include Arduino Mega-compatible development boards, 3D printer mainboards, industrial automation controllers, robotics platforms, and multi-UART sensor hubs, where 5V-tolerant I/O, generous FLASH for complex firmware, and many timer channels are decisive.
Design consideration: keep decoupling capacitors on every VCC/AVCC pin pair close to the 100-TQFP pads, and verify supply voltage versus the 16 MHz speed grade before layout, since underspecified supplies at full clock rate are a common bring-up pitfall.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA2560-16AUA0 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA2560-16AUA0 （相同外形与封装尺寸） ——差异在于 Package, ADC, Core Architecture, Operating Temperature, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
ATMEGA2560-16AU
✅ 直接替换✓ 有现货
$8.87 / 个
查看数据手册 →ATMEGA2560V-8AU
✅ 直接替换✓ 有现货
$8.95 / 个
查看数据手册 →ATMEGA2561-16AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$11.95 / 个
查看数据手册 →ATMEGA1280-16AU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA640-16AU
✅ 直接替换✓ 有现货
$6.9 / 个
查看数据手册 →ATMEGA2560-16AUA0 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Architecture | AVR enhanced RISC, 1 MIPS per MHz |
| FLASH Program Memory | 256 KB (128K x 16), ISP |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| General Purpose I/O | 86 |
| Working Registers | 32 general purpose |
| Timers | Six flexible timer/counters plus real-time counter |
| 封装 | 100-TQFP (14x14 mm) |
| 安装类型 | Surface Mount |
| Series | AVR ATmega |
ATMEGA2560-16AUA0 100-tqfp (14x14 mm) 引脚配置指南
ATMEGA2560-16AUA0（100-tqfp (14x14 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA2560-16AUA0.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA2560-16AUA0 适用于 6 应用s: Arduino Mega-Compatible Development Boards, 3D Printer Mainboards, Industrial Automation Controllers, Robotics Control Boards, Multi-UART Sensor Hubs and Gateways, Building Automation and HVAC Control.
Arduino Mega-Compatible Development Boards
The ATMEGA2560-16AUA0 is the exact MCU of the Arduino Mega 2560, so board makers can build pin-compatible Mega clones and derivatives with full Arduino IDE support. Its 86 GPIO lines map to the Mega's 54 digital and 16 analog pins, while 256 KB FLASH accommodates large sketches, Ethernet and LCD libraries that overflow an Arduino Uno. The 16 MHz clock and 1 MIPS/MHz AVR core keep existing sketches, bootloaders, and timing behavior identical to reference boards. Paired with an ATMEGA16U2 USB-bridge chip, the design implements the standard Mega USB programming front end, and ISP headers support production flashing. Because the Microchip AUA0 suffix is functionally identical to the legacy ATMEGA2560-16AU, no firmware changes are needed when qualifying either source.
推荐
3D Printer Mainboards
3D printer mainboards in the RAMPS/Mega tradition use the ATMEGA2560-16AUA0 because its 86 GPIO lines drive multiple stepper drivers, heaters, fans, thermistor inputs, and endstops from one chip. The 256 KB FLASH holds full Marlin-class firmware including LCD menus, SD handling, and mesh-bed-leveling code that exceeds smaller AVR parts, while six flexible timer/counters generate precise multi-axis step pulses at 16 MHz. Multiple hardware UARTs connect host, panels, and Wi-Fi add-ons without bit-banging overhead. The 5V logic matches common A4988/DRV8825 carrier boards directly, simplifying the bill of materials. Designers should decouple each VCC pin and route step/direction traces away from heater loads to protect the AVR core from ground bounce during high-current MOSFET switching.
推荐
Industrial Automation Controllers
In industrial automation, the ATMEGA2560-16AUA0 serves as a deterministic 5V control CPU for relay banks, valves, conveyors, and machine I/O where 86 GPIO lines eliminate expansion hardware. Its single-cycle AVR RISC core at 16 MHz provides roughly 16 MIPS, enough for fixed-latency scan loops, while 4 KB EEPROM stores configuration and calibration data through power cycles without external memory. The 100-TQFP (14x14 mm) 0.5 mm-pitch footprint is shared across the ATmega640/1280/2560 family, letting one PCB support memory-tiered product variants. Multiple hardware UARTs link HMIs, Modbus RTU networks, and sensors concurrently. Designers should add TVS protection on field-wired GPIO and watchdog supervision, since industrial transients on long cable runs are the leading cause of AVR field failures.
推荐
Robotics Control Boards
Robotics platforms choose the ATMEGA2560-16AUA0 when many servo channels, encoders, and sensor buses must be serviced simultaneously. Six flexible timer/counters at 16 MHz generate hardware PWM for a dozen or more servos with software-timed channels on the remaining GPIO, while external-interrupt-capable pins read quadrature encoders. The 256 KB FLASH and 8 KB SRAM run navigation, kinematics, and telemetry code plus full Arduino Mega library stacks that will not fit on ATmega328-class parts. Multiple hardware UARTs connect motor controllers, GPS, and radio links in parallel. For 5V sensor ecosystems the GPIO connects directly; for 3.3V IMUs or radios, level shifting is required. Keeping the same 100-TQFP footprint also allows migration to ATMEGA1280-16AU for cost-reduced robot variants.
推荐
Multi-UART Sensor Hubs and Gateways
The ATMEGA2560-16AUA0 fits sensor-hub and gateway designs that aggregate several serial devices: its multiple hardware UARTs, SPI, and I2C interfaces connect Modbus meters, GPS modules, radio links, and digital sensors concurrently without software serial jitter. At 16 MHz the AVR core delivers about 16 MIPS for protocol parsing, checksums, and local decision logic, while 8 KB SRAM buffers multi-channel data frames and 4 KB EEPROM persists node configuration offline. The 86 GPIO lines drive status outputs, relay control, and per-channel enables from the same chip. The 100-TQFP package's family-shared footprint lets procurement dual-source with ATMEGA640-16AU or ATMEGA1280-16AU depending on firmware size. Decouple all VCC pins with 100 nF ceramics placed within 2 mm of the pads for reliable high-speed serial operation.
推荐
Building Automation and HVAC Control
Building automation panels use the ATMEGA2560-16AUA0 to coordinate dampers, valves, pumps, and multi-zone sensors on one 5V controller. The 86 GPIO lines handle zone inputs and actuator outputs directly, six timer/counters provide PWM for variable-speed fans and proportional valves, and the real-time counter supports time-scheduled control with a 32 kHz crystal. Its 4 KB EEPROM retains setpoints, schedules, and commissioning data across power outages, and 256 KB FLASH holds protocol stacks, logging, and display code with headroom for revisions. Multiple hardware UARTs integrate BACbus/Modbus-style RS-485 links and service ports. The 100-TQFP 14x14 mm package reflows on standard lead-free assembly lines, and the family-shared footprint allows memory-tiered SKU options on a single PCB layout.
推荐
推荐产品汇总
工程参考数据： ATMEGA2560-16AUA0 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA2560-16AU | ATMEGA2560V-8AU | ATMEGA2561-16AU | ATMEGA1280-16AU | ATMEGA640-16AU |
|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology (Atmel legacy P/N) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | 8-bit AVR, 16 MHz | 8-bit AVR, 16 MHz | 8-bit AVR, 8 MHz | 8-bit AVR, 16 MHz | 8-bit AVR, 16 MHz | 8-bit AVR, 16 MHz |
| FLASH | 256 KB (128K x 16) | 256 KB | 256 KB | 256 KB | 128 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| GPIO | 86 | 86 | 86 | 79 | 86 | 86 |
关键差异点
- Full 16 MHz speed grade （对比 ATMEGA2560V-8AU)
- Largest FLASH in the pin-compatible family （对比 ATMEGA1280-16AU)
- Full 86-GPIO external bus configuration （对比 ATMEGA2561-16AU)
- Same-package family scaling for BOM flexibility （对比 ATMEGA640-16AU)
设计说明
Decouple every VCC and AVCC pin of the 100-TQFP package with a 100 nF ceramic placed within 2 mm of the pad, plus one bulk 10 uF per supply rail. The ATMEGA2560-16AUA0 drives many GPIO banks simultaneously, and simultaneous switching noise on an under-decoupled rail shows up as sporadic resets or EEPROM corruption. Verify the supply voltage against the -16 speed grade before layout: running 16 MHz outside the specified voltage range for this grade is the most common bring-up failure. Use a single solid ground plane rather than routed grounds.
The 0.5 mm pitch 100-TQFP (14x14 mm) is reflow-friendly but unforgiving for hand soldering; use drag soldering with flux wick cleanup and inspect with magnification for bridged pins on the fine-pitch banks. Keep the ISP/PDI programming header traces short and do not share them with high-current loads. If you use the external memory interface (ALE/RD/WR pins), terminate address/data lines cleanly and keep bus traces under 100 mm to avoid signal integrity issues at 16 MHz.
Do not assume 3.3V sensors connect directly: the AVR GPIO operates at the 5V-class supply rail, so 3.3V I2C or SPI devices need level shifting or open-drain pull-ups to the correct rail. Also note that Arduino Mega D-pin numbers differ from datasheet port-pin names (PB, PC, PD... PE/PG banks); always cross-check the pighixxx-style mapping or the family datasheet pin table before routing. When migrating to ATMEGA2561-16AU, verify the peripheral pin differences rather than assuming pin-for-pin identity with the 2560.
合规信息
Compliance status was not explicitly stated in the provided web data; confirm RoHS/REACH certificates per date code via the Microchip product page or distributor compliance documents.
