ATTINY817-MF - 20MHz 8KB AVR MCU | Microchip Technology
料号： ATTINY817-MF ✓ 量产中ATTINY817-MF 概述
An 8-bit microcontroller is a compact embedded processor designed to execute control logic, monitor inputs, and operate peripherals without a separate external processor. The ATTINY817 belongs to the tinyAVR 1-series, combining an AVR CPU with hardware multiplier, Event System, SleepWalking, and picoPower technology in an integrated mixed-signal platform.
The device provides 8 KB of Flash for program storage, 512 bytes of SRAM for working data, and 128 bytes of EEPROM for nonvolatile parameter retention. Its hardware multiplier supports efficient multiplication in control and signal-processing routines, while the 20 MHz maximum clock frequency provides additional timing headroom for mixed peripheral workloads.
Core Independent Peripherals allow hardware events to trigger timer, communication, and analog operations without continuous CPU intervention. This event-driven architecture can reduce software polling, improve response timing, and support low-power designs that combine active processing with sleep modes and SleepWalking behavior.
Typical uses include compact sensor controllers, industrial monitoring modules, communication equipment, LED-control systems, and compact consumer-control boards. The 24-pin VQFN footprint is particularly useful where PCB area is constrained and a surface-mount production process is preferred.
When laying out the board, follow the exact exposed-pad, thermal-pad, and decoupling guidance in the manufacturer datasheet. Preserve the specified UPDI programming access, validate analog and communication signal routing, and use the exposed pad as intended for electrical and thermal performance.
This product record combines verified manufacturer specifications, current distributor availability, drop-in family alternatives, and application-focused design guidance. It provides the technical and purchasing context needed to evaluate ATTINY817-MF for an embedded control design without relying on raw distributor listings alone.
直接替换替代料： ATTINY817-MF ——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： ATTINY817-MF （相同外形与封装尺寸） ——差异在于 Package, Product Type.
ATTINY817-SS
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY817-SH
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY816-MF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY814-MF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY816-SS
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY817-MF 最大额定值与电气特性
| Product Type | 8-bit AVR RISC microcontroller |
| Series | tinyAVR 1-series |
| 最大时钟频率 | 20 MHz |
| Flash Memory | 8 KB |
| SRAM | 512 bytes |
| EEPROM | 128 bytes |
| Supply Voltage Range | 4.5 V to 5.5 V |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 24-pin VQFN with exposed pad |
| 引脚数量 | 24 pins |
| CPU Architecture | AVR with hardware multiplier |
| Program Memory Type | Flash |
| Nonvolatile Data Memory | 128-byte EEPROM |
| 安装类型 | Surface mount |
| Shipping Container | Tray |
| Core Independent Peripherals | Supported |
| Event System | Supported |
| SleepWalking | Supported |
| Technology | picoPower |
| Programming Interface | UPDI |
ATTINY817-MF 24-pin vqfn with exposed pad 引脚配置指南
ATTINY817-MF（24-pin vqfn with exposed pad 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： ATTINY817-MF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY817-MF 适用于 6 应用s: Industrial Sensor Monitoring, Compact Communication Controller, LED and Illumination Control, Battery-Powered Portable Control, Security and Access-Control Module, Precision Analog Control.
Industrial Sensor Monitoring
The ATTINY817-MF fits compact industrial sensor-monitoring modules because its 20 MHz AVR processor can sample control signals, supervise thresholds, and manage digital interfaces while the 8 KB Flash accommodates application firmware. The 512-byte SRAM supports working state and the 128-byte EEPROM retains calibration or configuration values. Its verified -40°C to +125°C range supports equipment operating beyond typical commercial temperatures. Core Independent Peripherals can also handle timer or communication events without continuous polling, improving response time and reducing processor load.
推荐
Compact Communication Controller
ATTINY817-MF is appropriate for small communication controllers that coordinate sensors, indicators, and a host interface. Its 20 MHz operating frequency provides processing headroom, while the family’s Event System and Core Independent Peripherals support event-driven handling of timer, serial, and external signals. The 8 KB Flash and 512-byte SRAM are suitable for compact protocol stacks and state machines rather than large buffering workloads. The 24-pin VQFN package also helps reduce board area in space-constrained gateway or control modules.
推荐
LED and Illumination Control
The ATTINY817-MF can control addressable or multi-channel LED systems where timing accuracy, compactness, and autonomous operation matter. A 20 MHz AVR core supports timer-based updates and effect sequencing, while the hardware multiplier assists calculation-heavy control routines. Its 8 KB Flash provides space for firmware and lookup data, and the 128-byte EEPROM can hold settings that should survive power removal. The 24-pin VQFN footprint supports compact lighting modules without requiring a large through-hole package.
推荐
Battery-Powered Portable Control
ATTINY817-MF supports portable and battery-powered control products when the power architecture maintains the verified 4.5 V to 5.5 V supply range. The tinyAVR 1-series incorporates picoPower technology, sleep modes, and SleepWalking, enabling firmware to reduce active time or react to selected events while peripheral functions continue. The 8-bit architecture also avoids the power and cost burden of a larger processor in simple controls. Actual battery life remains application-dependent because regulator efficiency, wake frequency, analog usage, and external load were not quantified in the supplied data.
推荐
Security and Access-Control Module
ATTINY817-MF can serve as the controller in compact access-control, keypad, or interlock modules where deterministic state management and multiple digital inputs are required. Its 20 MHz clock supports responsive debouncing and event sequencing, while 8 KB Flash accommodates control logic and the 128-byte EEPROM retains basic configuration. The family’s event-driven peripherals can reduce the need for continuous software polling. Package-level security qualification, cryptographic capability, and tamper-resistance requirements are not stated in the supplied verified data and must be evaluated separately.
推荐
Precision Analog Control
ATTINY817-MF is suitable for small mixed-signal control products combining analog supervision with digital processing. The 20 MHz AVR processor can perform closed-loop updates, filtering, and threshold decisions, while the tinyAVR 1-series is described as providing accurate analog features and Core Independent Peripherals. The 8 KB Flash and 512-byte SRAM support compact control algorithms and buffers. An external precision reference such as the TCA4311 can support more demanding measurement accuracy, although the target’s detailed ADC, reference, and converter parameters were not included in the supplied excerpts.
推荐
推荐产品汇总
工程参考数据： ATTINY817-MF ——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 | ATTINY817-SS | ATTINY817-SH | ATTINY816-MF | ATTINY814-MF | ATTINY816-SS |
|---|---|---|---|---|---|---|
| Package | 24-pin VQFN with exposed pad | 24-pin VQFN with exposed pad | 24-pin VQFN with exposed pad | 24-pin VQFN with exposed pad | 24-pin VQFN with exposed pad | 24-pin VQFN with exposed pad |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Upper Operating Temperature | +125°C | +85°C | +105°C | +125°C | +125°C | +85°C |
| Special Features | Event System, SleepWalking, Core Independent Peripherals, picoPower | Same tinyAVR 1-series feature platform | Same tinyAVR 1-series feature platform | Family member with different peripheral-instance availability | Family member with fewer peripheral instances | Family member with different peripheral-instance availability |
关键差异点
- Higher verified temperature limit （对比 ATTINY817-SS)
- Additional temperature-grade headroom （对比 ATTINY817-SH)
- Higher family position with 8 KB Flash and 512-byte SRAM （对比 ATTINY814-MF)
设计说明
Use the exposed-pad land pattern and thermal design specified in the Microchip ATtiny417/817 manufacturer datasheet DS40001901C. Place the required input and decoupling capacitors close to their associated supply pins, minimize return-path impedance, and provide a continuous ground reference beneath the device where the package drawing permits. Do not substitute a generic QFN footprint without checking pad dimensions and exposed-pad construction.
Preserve access to the UPDI programming interface and keep programming and debug routing away from sensitive analog and communication nets. If analog inputs are used, separate them from switching-node and high-current return paths, and verify grounding under the intended operating conditions. The verified search excerpts do not provide the complete pin map or analog routing guidance, so the manufacturer package and circuit diagrams must govern the final layout.
Design the supply for the verified 4.5 V to 5.5 V operating range and verify startup, reset, and brownout behavior in the complete system. Because low-power battery operation was not quantified, calculate the complete load-current budget from the MCU, external regulator losses, pull networks, LEDs, sensors, and communications. Validate both average current and peak current rather than relying only on the microcontroller’s sleep-mode specification.
Do not treat family-level pin compatibility as proof that every alternative is a transparent firmware replacement. Microchip states that vertical migration can preserve code, while downward migration may require changes when fewer peripheral instances are available. Before substituting ATTINY814-MF, ATTINY816-MF, or ATTINY816-SS, audit timer channels, comparator and ADC resources, communication instances, interrupt vectors, pin multiplexing, package exposure, and temperature requirements.
合规信息
The supplied verified snippets identify a green industrial-temperature device, but they do not explicitly establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred from the product family name.
