ATTINY828-AU - 20MHz AVR MCU, 8KB Flash | Microchip
料号： ATTINY828-AU ✓ 量产中ATTINY828-AU 概述
An 8-bit AVR microcontroller is a compact embedded-control device that combines a processor core, nonvolatile program memory, data memory, and peripherals on one semiconductor die. The AVR enhanced RISC architecture executes most instructions in a single clock cycle, allowing the ATTINY828-AU to approach 1 MIPS per MHz. Within the product hierarchy, it is a general-purpose microcontroller and embedded-processing IC designed for compact control, sensing, communication, and low-power automation systems.
The principal benefits of the ATTINY828-AU include 8 KB of reprogrammable Flash for application code, 28 GPIO pins for external interfaces, and dedicated communication peripherals that reduce the need for separate interface chips. Its 10-bit ADC supports analog measurement, while the two SPI interfaces, USART, and TWI support serial communication with sensors, displays, memories, and other embedded controllers. PWM-capable 8-bit and 16-bit timer/counters support timing, waveform generation, and motor-control functions.
The controller uses high-density non-volatile memory technology, allowing the Flash program memory to be reprogrammed in-system through a serial interface. Its debugWIRE interface supports on-chip debugging, and the 32.768 kHz ultra-low-power oscillator provides a time base for low-power timing. The internal 8 MHz oscillator has a stated accuracy of plus or minus 2%, while the maximum operating frequency listed for the ATTINY828-AU is 20 MHz. Supported supply options include 1.8 V, 2.5 V, 3.3 V, and 5 V.
Typical applications include industrial sensor nodes, compact control panels, motor and actuator controllers, low-power data-acquisition equipment, connected embedded products, and battery-powered monitoring systems. The combination of 28 GPIO pins and multiple serial peripherals makes it suitable for designs that must consolidate several discrete interface functions around one controller. An external precision oscillator can be used when the application requires more accurate timing than the internal 8 MHz source provides.
PCB design should preserve access to all programming and debug signals and route sensitive analog inputs away from switching nodes. Power, ground, decoupling, and exposed thermal-pad connections must follow the package recommendations in the manufacturer datasheet. Firmware should also account for the tolerance of the internal oscillator when relying on it for communication timing, sampling intervals, or real-time schedules.
This page combines a technical feature overview, application guidance, package information, engineering design notes, and direct comparison criteria for engineers evaluating the ATTINY828-AU. It also distinguishes exact device functions from uncertain procurement or qualification information, helping teams select the appropriate controller for a new embedded design.
直接替换替代料： ATTINY828-AU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料ATTINY828-AU 最大额定值与电气特性
| Product Type | 8-bit AVR RISC-based microcontroller (MCU) |
| 最大时钟频率 | 20 MHz |
| Program Memory | 8 KB in-system programmable Flash |
| EEPROM | 256 bytes |
| Internal SRAM | 512 bytes |
| General-Purpose I/O | 28 GPIO pins |
| ADC Resolution | 10 bits |
| Timer/Counter Resources | 1 x 8-bit timer/counter and 1 x 16-bit timer/counter with PWM |
| Serial Interfaces | 1 x USART, 1 x TWI, and 2 x SPI |
| Low-Power Oscillator | 32.768 kHz |
| Internal RC Oscillator | 8 MHz with plus or minus 2% accuracy |
| Debug Interface | debugWIRE |
| CPU Architecture | AVR enhanced RISC |
| Instruction Set | 123 instructions, most executed in a single clock cycle |
| Execution Throughput | Approaching 1 MIPS per MHz |
| Supply Voltage Options | 1.8 V, 2.5 V, 3.3 V, and 5 V |
| 封装 | 32-pin TQFP, 7 mm x 7 mm |
| 安装类型 | Surface-mount |
| Process Technology | High-density non-volatile memory technology |
| 生命周期状态 | Active |
ATTINY828-AU 32-pin tqfp, 7 mm x 7 mm 引脚配置指南
ATTINY828-AU（32-pin tqfp, 7 mm x 7 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： ATTINY828-AU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY828-AU 适用于 6 应用s: Industrial Sensor Nodes, Compact Motor and Actuator Control, Battery-Powered Monitoring, Serial Connected Embedded Products, Data Acquisition and Control Panels, Programmable Logic and Automation.
Industrial Sensor Nodes
The ATTINY828-AU fits industrial sensor nodes because its 28 GPIO pins can support discrete sensors, indicator outputs, and digital controls while the 10-bit ADC handles analog measurement channels. Two SPI interfaces, one USART, and one TWI allow the controller to connect a local sensor, memory device, or network module without relying on a separate microcontroller. At a 20 MHz maximum clock, the AVR core supports responsive acquisition and control logic, although the internal 8 MHz oscillator's plus or minus 2% tolerance should be included in timing margins.
推荐
Compact Motor and Actuator Control
The ATTINY828-AU is appropriate for compact motor and actuator control because its timers support PWM output, while 28 GPIO pins accommodate direction, limit, fault, and interlock signals. The controller can monitor switch inputs and coordinate low-power actuators while keeping the design within a 7 mm by 7 mm TQFP footprint. Designers should separate motor switching from sensitive timing paths and validate the 16-bit timer's output mapping, dead time, and fault response in firmware before connecting the power stage.
推荐
Battery-Powered Monitoring
ATTINY828-AU supports battery-powered monitoring designs that require periodic sensing and limited active processing. Its 512 bytes of SRAM can hold short acquisition and control tasks, while the 8 KB Flash capacity accommodates application firmware and the 32.768 kHz ultra-low-power oscillator supports low-frequency timing. Power budgeting should use the manufacturer operating and power-characteristic curves for the selected supply voltage, sleep mode, and peripheral state; the internal RC oscillator tolerance must also be included when the measurement interval depends on accurate timekeeping.
推荐
Serial Connected Embedded Products
The ATTINY828-AU works well in serial connected embedded products because it combines USART, TWI, and two SPI interfaces with 28 GPIO pins. The TWI bus can connect low-speed peripherals, the USART supports a point-to-point or multidrop link, and the two SPI interfaces allow multiple synchronous sensors or memories. This integration can reduce board area, but firmware and PCB planning must account for bus contention, pull-up requirements, signal levels, pin multiplexing, and independent peripheral clock behavior.
推荐
Data Acquisition and Control Panels
The ATTINY828-AU is well suited to compact data-acquisition and control-panel assemblies because the 10-bit ADC, two SPI channels, USART, and TWI support several mixed sensor and communication needs. Its 28 GPIO pins can drive displays, relays, status indicators, and user inputs while the AVR core performs local filtering and threshold logic. For panel designs requiring more memory or higher-resolution conversion, retain the ATTINY828-AU for control and add a dedicated ADC such as the MCP3424-E/SL rather than expanding software complexity unnecessarily.
推荐
Programmable Logic and Automation
ATTINY828-AU can implement compact programmable logic when a design needs more deterministic digital control than a basic logic device but does not require a larger real-time MCU. The 20 MHz AVR core, PWM-capable timers, interrupt-capable GPIO, and serial debug support event handling and firmware-based sequencing. Logic timing should be analyzed at the intended operating voltage and temperature, especially if the design relies on the internal 8 MHz oscillator, whose specified accuracy is plus or minus 2%, or on precise relationships among timer and serial peripheral clocks.
推荐
推荐产品汇总
工程参考数据： ATTINY828-AU ——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 |
|---|---|
| Package | 32-pin TQFP, 7 mm x 7 mm |
| Brand | Microchip Technology |
| CPU Architecture | 8-bit AVR enhanced RISC |
| Maximum Clock Frequency | 20 MHz |
| Program Memory | 8 KB in-system programmable Flash |
| EEPROM | 256 bytes |
| Internal SRAM | 512 bytes |
| General-Purpose I/O | 28 GPIO pins |
| ADC Resolution | 10 bits |
| Serial Interfaces | USART, TWI, and 2 x SPI |
关键差异点
- Broad peripheral integration in a compact package （对比 ATMEGA88PA-AU)
- Sufficient memory for compact embedded applications （对比 ATMEGA48PA-ANR)
- Flexible low-speed timing resource （对比 ATtiny48-MUR)
设计说明
Place the decoupling network at the power pins and route it using the shortest practical return path. Preserve access to reset, programming, and debug signals so production programming and troubleshooting do not require board modifications. For the 32-pin TQFP, verify land dimensions, exposed-pad requirements, mask-defined or solderable pad geometry, and paste pattern against the package drawing in the manufacturer datasheet before releasing the PCB footprint.
Keep SPI, TWI, UART, oscillator, and ADC routing away from noisy switching paths and motor-drive conductors. Apply the pull-ups and bus capacitance limits required by the attached peripheral rather than treating every serial interface as electrically interchangeable. When using the internal 8 MHz oscillator, its plus or minus 2% accuracy must be included in baud-rate, sampling-window, and timing-margin calculations; use an external clock when tighter timing is necessary.
Do not select a substitute solely because it has 8 KB of Flash, a 20 MHz clock, and a 32-pin TQFP package. A genuine board-level replacement must also match pin functions, GPIO multiplexing, ADC channels, timer outputs, serial mappings, memory organization, voltage limits, and programming behavior. Confirm the exact ordering suffix and package dimensions before procurement, and validate any proposed alternative through schematic comparison, compilation, timing analysis, and hardware testing.
合规信息
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified in the cited product-page and distributor excerpts. Obtain the current declarations for the exact ordering code and production lot.
