ATTINY424-XU - 20MHz AVR Microcontroller | Microchip Technology
料号： ATTINY424-XU ✓ 量产中ATTINY424-XU 概述
A microcontroller is a programmable semiconductor that integrates a CPU, memory, and peripherals on one device. The ATTINY424-XU belongs to the hierarchy of microcontrollers, embedded processors, and semiconductors. Its small memory footprint and 14-pin package make it suitable for compact control, sensing, and communication modules where board area and energy efficiency are important constraints.
The device provides 4 KB of in-system programmable Flash organized as 4K by 16-bit pages, together with 512 bytes of SRAM and 128 bytes of EEPROM. The AVR CPU supports 16-bit and 32-bit instructions and executes at up to 20 MHz. Core-independent peripherals reduce interrupt overhead and allow timing, serial communication, and other functions to operate with limited CPU involvement.
The ATTINY424 family also includes devices with 8 KB of Flash, providing a common platform for applications that require more program storage. The ATTINY424-XU is specifically identified as a 14-pin TSSOP industrial-temperature device rated to 85°C. Its compact package supports conventional surface-mount assembly while exposing the mixed-signal and digital resources required by embedded systems.
Typical uses include industrial control modules, compact sensor nodes, LED-control circuits, small motor controllers, and communication equipment. A design can use the 20 MHz clock for responsive control logic, utilize Flash for firmware, and place frequently changed configuration data in EEPROM. Serial-interface and timing peripherals can reduce firmware complexity when their core-independent functions match the application.
PCB design should preserve short return paths for digital and analog signals, place decoupling capacitors close to the supply pins, and route sensitive inputs away from fast-switching nodes. Designers should also verify the exact peripheral multiplexing and pin functions in the manufacturer pin-description table before assigning external circuitry. The 14-pin TSSOP footprint requires careful solder-paste and reflow design to achieve reliable fine-pitch joints.
This product page combines the manufacturer device information, exact-orderable-part identification, package details, and practical engineering guidance. It also distinguishes genuine drop-in replacements from related tinyAVR devices that use different packages or memory configurations, helping engineers make a defensible sourcing or replacement decision without assuming compatibility.
直接替换替代料： ATTINY424-XU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
ATTINY424-XF
✅ 直接替换联系询价
查看数据手册 →ATTINY424-XU 最大额定值与电气特性
| Microcontroller Type | 8-bit AVR tinyAVR 2-series microcontroller |
| Maximum CPU Frequency | 20 MHz |
| Flash Memory | 4 KB |
| Flash Organization | 4K x 16-bit pages |
| Program Memory Type | In-system programmable Flash |
| SRAM | 512 bytes |
| EEPROM | 128 bytes |
| CPU Architecture | AVR with hardware multiplier |
| Instruction Word Length | 16-bit or 32-bit |
| 封装 | 14-pin TSSOP |
| Maximum Operating Temperature | 85°C |
| Temperature Grade | Industrial |
| 安装类型 | Surface mount |
| Green Indicator | Green |
| Core-Independent Peripherals | Yes |
ATTINY424-XU 14-pin tssop 引脚配置指南
ATTINY424-XU（14-pin tssop 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： ATTINY424-XU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY424-XU 适用于 6 应用s: Compact Industrial Control Module, Battery-Powered Sensor Node, LED Lighting Controller, Small Motor Control Controller, Serial Communication Equipment, Embedded Data Acquisition Front End.
Compact Industrial Control Module
The ATTINY424-XU fits compact industrial control modules where a 20 MHz control loop must operate from a 14-pin surface-mount footprint. Its 4 KB of in-system programmable Flash provides space for event sequencing, state-machine logic, and communication handling, while 512 bytes of SRAM supports working variables. The industrial-temperature marking and 85°C maximum rating distinguish it from extended-temperature variants. Use the mixed-signal inputs only after confirming their analog and digital multiplexing in the pin table, and isolate sensitive measurement paths from switching nodes to preserve control accuracy.
推荐
Battery-Powered Sensor Node
For a battery-powered sensor node, the ATTINY424-XU provides an 8-bit AVR processor running at up to 20 MHz while offering a compact 4 KB Flash and 512-byte SRAM footprint. Its EEPROM can hold small calibration or configuration records, reducing the need for external nonvolatile storage. Core-independent peripherals can offload repetitive timing or communication tasks and reduce active CPU time. Power savings still depend on the selected clock mode, peripheral activity, and external sensor load. Keep the supply path efficient and place the decoupling network close to the device.
推荐
LED Lighting Controller
The ATTINY424-XU is suitable for LED lighting controllers that combine timing logic, user commands, and multiple low-power outputs. Its 20 MHz execution rate supports responsive menu handling and animation updates, while the hardware multiplier and core-independent peripherals can accelerate compatible operations. The 4 KB program-memory limit is adequate for compact lighting patterns and communication protocols but requires disciplined code organization for larger feature sets. Ensure LED current is handled outside the microcontroller, use suitable drive transistors, and provide local decoupling at the device supply pins.
推荐
Small Motor Control Controller
The ATTINY424-XU can serve as the supervisory controller in a small motor system when the application needs compact firmware, fast event handling, and a limited pin count. Its AVR CPU runs at up to 20 MHz and its core-independent peripherals support deterministic control functions. The MCU should command a suitable power stage rather than drive motor current directly. Add fault handling for stalled or overloaded motors, separate noisy motor returns from analog references, and verify the operating-temperature requirement against the enclosure’s worst-case ambient temperature.
推荐
Serial Communication Equipment
The ATTINY424-XU is appropriate for compact serial-interface equipment that translates commands, updates a local display, or coordinates peripheral actions. Its 20 MHz AVR core can support responsive protocol handling, and the tinyAVR 2-series core-independent peripherals can reduce processor intervention for eligible communication functions. The 512-byte SRAM limit requires attention when buffering messages, while 4 KB of Flash constrains protocol stacks and feature complexity. Match the external transceiver levels and connector requirements, and route communications traces away from noisy power-conversion paths.
推荐
Embedded Data Acquisition Front End
The ATTINY424-XU can control a compact data-acquisition front end when measurements can be sampled and processed within the limits of a 20 MHz 8-bit AVR core and 512 bytes of SRAM. Its mixed-signal resources make it useful for supervisory conversion, thresholding, and configuration tasks when the selected analog channels and acquisition timing meet the application requirements. Use the shortest practical input traces, maintain a quiet reference return, and separate analog and digital return currents where the board layout allows. Confirm conversion timing and input limits from the datasheet rather than assuming performance from CPU frequency.
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推荐产品汇总
工程参考数据： ATTINY424-XU ——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 | ATTINY424-XF |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 14-pin TSSOP | 14-pin TSSOP |
| Flash Memory | 4 KB | 4 KB |
| Ordering Suffix | ATTINY424-XU | ATTINY424-XF |
关键差异点
- Exact 4 KB Flash configuration in a compact 14-pin package （对比 ATTINY426-XU)
- 20 MHz operation for responsive embedded control （对比 ATTINY424-XF)
- Identified industrial-temperature orderable variant （对比 ATTINY424-XF)
设计说明
Place the required supply-decoupling capacitors immediately adjacent to the ATTINY424-XU supply and ground pins. Keep the high-frequency return path continuous beneath or close to the device, and route analog inputs and references away from switching-node copper. Because the controller uses a 14-pin TSSOP package, its fine-pitch leads and limited pin count require careful land-pattern and paste-volume review before production.
Design the supply and grounding around the maximum 20 MHz operating condition rather than the idle state. External sensor loads, communication transceivers, and output drivers can create transient demand that is not represented by the microcontroller’s own current consumption. Include local bulk capacitance where the load changes rapidly, maintain a stable reference return, and verify brownout and startup behavior against the actual supply ramp.
Do not treat ATtiny424-family devices with different flash sizes, package pin counts, or suffix codes as automatic replacements. ATTINY426-XU uses a different package from ATTINY424-XU, while ATTINY424-XF requires ordering-information verification. Before substitution, compare the complete ordering code, pin-by-pin function, power pins, programming interface, memory limits, and maximum temperature rating, then recompile and test the firmware.
合规信息
The distributor listing identifies ATTINY424-XU as Green, but no explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified. The Green designation should not be treated as a substitute for those individual compliance statements.
