ATMEGA1280-16AU - 16MHz 128KB AVR MCU | Microchip Technology
料号： ATMEGA1280-16AU ✓ 量产中ATMEGA1280-16AU 概述
An 8-bit microcontroller such as the ATMEGA1280-16AU combines a processor core, nonvolatile program memory, volatile data memory, and programmable peripherals in one integrated circuit. Within the semiconductor hierarchy, it is an MCU, a microcontroller, and an embedded-control IC. Its AVR architecture executes compact instruction sets directly from flash while retaining deterministic timing suitable for motor, communications, measurement, and general industrial-control systems.
The 128 KB flash capacity supports larger firmware than smaller 8-bit AVR devices, while the 16 MHz operating limit provides useful processing headroom for protocol handling and real-time control. Four hardware USARTs allow simultaneous serial communication, and the 10-bit ADC supports 16 analog input channels. The 86 I/O lines also permit multiple digital interfaces, indicators, sensors, and actuator outputs in a single controller.
The device uses an advanced RISC architecture with 133 or 135 powerful instructions depending on the documented family revision, with most instructions executing in a single clock cycle. It includes 32 general-purpose working registers and dedicated timer/counter resources supporting compare modes and PWM. These features allow time-critical tasks to be scheduled without relying entirely on software delays.
Typical uses include Arduino Mega-class embedded platforms, industrial automation modules, data acquisition units, serial gateways, instrumentation, and motor-control boards. Four USARTs are particularly useful for multi-channel logging or communications, while the ADC and numerous I/O pins support sensor acquisition and discrete control functions.
Designers should preserve the 16 MHz clock and power-decoupling requirements in the manufacturer datasheet, and should assign pin multiplexing carefully because the 86 I/O lines include alternate peripheral functions. Firmware must also account for the ATmega1280's larger memory map and peripheral configuration requirements rather than assuming compatibility with smaller AVR devices.
This page combines manufacturer specifications, distributor availability, source-linked technical facts, and engineering-focused selection guidance. It also distinguishes confirmed package compatibility from broader functional equivalence, helping engineers identify when a true footprint-compatible replacement is documented and when a different AVR family requires PCB, firmware, or validation changes.
直接替换替代料： ATMEGA1280-16AU ——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： ATMEGA1280-16AU （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, ADC, Timers/Counters, Flash Memory.
该产品暂无直接替换替代料。
请求替代料ATMEGA1280-16AU 最大额定值与电气特性
| Product Type | 8-bit AVR RISC-based microcontroller |
| Maximum Clock Speed | 16 MHz |
| Flash Memory | 128 KB |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| General-Purpose I/O Lines | 86 lines |
| General-Purpose Working Registers | 32 registers |
| ADC | 16-channel, 10-bit |
| USART | 4 channels |
| Timer/Counters | 6 flexible timer/counters |
| Two-Wire Serial Interface | Byte-oriented TWI/I2C |
| Debug and Programming Interface | JTAG |
| 数据总线宽度 | 8-bit |
| Operating Voltage | 2.7 V to 5.5 V |
| 工作温度 | -40°C to +85°C |
| 封装 | 100-pin TQFP, 14 x 14 mm |
| 安装类型 | Surface mount |
| 生命周期状态 | Active |
ATMEGA1280-16AU 100-pin tqfp, 14 x 14 mm 引脚配置指南
ATMEGA1280-16AU（100-pin tqfp, 14 x 14 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： ATMEGA1280-16AU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA1280-16AU 适用于 6 应用s: Arduino Mega-Compatible Embedded Control, Multi-Port Serial Data Logger, Industrial Data Acquisition Controller, Motor and PWM Control, Instrumentation and Measurement Front End, Communication Gateway and Protocol Bridge.
Arduino Mega-Compatible Embedded Control
The ATMEGA1280-16AU fits Arduino Mega-compatible control boards because the verified DFRobot result identifies a Mega1280 platform with 54 digital I/O pins, 16 analog inputs, four UARTs, a 16 MHz crystal, USB connectivity, and an ICSP header. The MCU directly supplies the core processing, timing, serial-interface, and analog-conversion resources required by that architecture. Its 128 KB flash provides substantially more firmware space than many smaller AVR controllers. Integration still requires exact Arduino Mega schematic matching, bootloader compatibility, USB-interface implementation, and verification of the 100-pin TQFP land pattern.
推荐
Multi-Port Serial Data Logger
The ATMEGA1280-16AU is well suited to multi-port serial logging because it includes four hardware USARTs alongside an 8-bit AVR core operating at up to 16 MHz. Each USART can service a separate sensor, radio, display, or service link, reducing the need for software bit-banged communication. Its 8 KB SRAM provides working space for buffering and the 4 KB EEPROM can retain configuration data, although the datasheet should be consulted for endurance and write-time limitations. Firmware should isolate traffic by port, implement framing and timeout handling, and avoid blocking all four channels during flash operations.
推荐
Industrial Data Acquisition Controller
The ATMEGA1280-16AU supports industrial data-acquisition functions with its 16-channel, 10-bit ADC and 86 general-purpose I/O lines. Analog sensors can be multiplexed through the ADC while digital lines operate sensors, status indicators, relays, and communication links. Its four USARTs allow measured data to be transferred to a host or remote node, and six timer/counters support periodic sampling and event timing. Because the verified excerpts do not provide detailed ADC accuracy, reference voltage, or acquisition-time figures, those values must be checked in the manufacturer datasheet before defining measurement resolution or sampling bandwidth.
推荐
Motor and PWM Control
The ATMEGA1280-16AU can coordinate PWM, timing, digital I/O, and communications in a motor-control or actuator system. Its six flexible timer/counters provide hardware resources for timing tasks and compare functions, while the 86 I/O lines leave ample connections for control signals, limit switches, encoders, and status feedback. The 16 MHz clock also supports responsive event handling in an 8-bit control architecture. Exact PWM frequency, timer resolution, and pin-muxing constraints are not present in the supplied excerpts, so designers must consult the manufacturer timing diagrams and ensure that the selected output pins remain compatible with the intended motor-driver circuit.
推荐
Instrumentation and Measurement Front End
The ATMEGA1280-16AU is appropriate for instrumentation front ends that combine analog measurement, local processing, and serial reporting. Its 16-channel 10-bit ADC can acquire sensor signals, while four USARTs can expose results through RS-232, UART-based instrumentation, or other external converters. The 128 KB flash capacity permits larger calibration tables and communication firmware, and 8 KB SRAM supports active data handling. Designers should account for analog-reference stability, input multiplexing time, grounding, and digital isolation; those electrical details are not quantified in the supplied search excerpts and must be obtained from the official datasheet before precision measurements are committed.
推荐
Communication Gateway and Protocol Bridge
The ATMEGA1280-16AU can act as a protocol gateway when a system must translate data among several serial links. Four hardware USARTs allow concurrent connections to local equipment, computers, or sensors, while the JTAG interface supports debugging and the 86 I/O lines provide auxiliary status and control connections. Its 128 KB flash is useful for maintaining multiple protocol stacks, configuration tables, and firmware update logic. For an industrial deployment, engineers should verify supply-voltage tolerance, clock accuracy, watchdog behavior, and communications timing in the manufacturer documentation, then implement a hardware-in-the-loop test for every connected device and baud rate.
推荐
推荐产品汇总
工程参考数据： ATMEGA1280-16AU ——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 |
|---|---|
| Brand | Microchip Technology |
| Package | 100-pin TQFP, 14 x 14 mm |
| Architecture | 8-bit AVR RISC |
| Maximum Clock Speed | 16 MHz |
| Flash Memory | 128 KB |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| General-Purpose I/O | 86 lines |
| USART Channels | 4 |
| ADC | 16-channel, 10-bit |
| Timer/Counters | 6 |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40°C to +85°C |
| Listed Unit Price | $12.2201 at LCSC as of 2026-10-28 |
关键差异点
- Large memory configuration within an 8-bit AVR controller （对比 ATMEGA640-16AU)
- Broader firmware headroom while retaining AVR compatibility （对比 ATMEGA1284P-AUR)
- Four dedicated hardware serial channels （对比 ATMEGA640-16AU)
设计说明
Use a supply within the verified 2.7 V to 5.5 V operating range and place the manufacturer-specified decoupling capacitors close to the ATMEGA1280-16AU power pins. Decouple each supply domain separately where the datasheet identifies separate VCC and AVCC connections. Confirm the analog-supply filtering arrangement against the official pinout and power recommendations before routing. The supplied excerpts do not state capacitor values, so component selection must not be based on the distributor summaries alone.
Assign the 86 I/O functions at the schematic stage because several pins provide alternate peripheral functions. Preserve the exact 100-pin TQFP 14 x 14 mm footprint and verify pin numbering against the official ATmega1280 pinout before generating PCB artwork. Because a complete pin table is absent from the supplied web excerpts, the released Gerber and symbol should be checked independently against Microchip documentation rather than inferred from a generic ATmega symbol.
Do not treat the ATMEGA2560 as an automatically identical replacement even though a verified source describes the two devices as pin-for-pin equivalents. The ATMEGA2560 provides twice the flash, and the ATMEGA1280-16AU is specifically a 16 MHz, 100-pin TQFP ordering variant. Review the exact suffix, memory map, peripheral behavior, clock setup, boot and fuse configuration, and firmware before approving a substitution for production.
Plan the 16 MHz clock circuit and communication interfaces away from noisy switching nodes, and provide a clean return path for analog and digital ground connections. The four USARTs and ADC make signal integrity relevant when routing external cables or sensor wiring. Use controlled-impedance or filtered interfaces where required, and separate slow sensor inputs from high-current actuator paths. Exact grounding topology and clock-component values must follow the manufacturer hardware guidance.
合规信息
The supplied verified snippets identify the product as active and provide an industrial temperature range of -40°C to +85°C, but they do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance.
