ATTINY24A-PU 8-Bit 20MHz AVR MCU | Microchip Technology
料号： ATTINY24A-PU ✓ 量产中ATTINY24A-PU 概述
An 8-bit AVR microcontroller is a compact embedded controller that executes instructions from reduced instruction set computer architecture in a single clock cycle for most instructions. The ATTINY24A family combines an 8-bit AVR core with 32 general-purpose working registers, 2 KB of programmable Flash, 128 bytes of EEPROM for nonvolatile data, and 128 bytes of SRAM for working memory. Its 12 GPIO lines can be configured for digital input, output, or peripheral functions, while the integrated timer/counter provides timing and PWM capability for motor, lighting, and signal-generation applications.
Key features include support for In-System Programming, an 8-bit timer/counter with two PWM channels, and a low-power picoPower design. The 2 KB Flash capacity is sufficient for compact control firmware, sensor conditioning, simple communication protocols, and utility functions rather than complex graphical or connectivity-heavy applications. The ATTINY24A-PU operates from 1.8 V to 5.5 V, allowing operation from low-voltage cells, regulated 3.3 V rails, and legacy 5 V systems.
The ATTINY24A-PU is useful in industrial controls, LED lighting modules, battery-powered instruments, fan and pump controllers, automotive accessories, and small sensor nodes. Its through-hole PDIP package is easy to prototype and hand-solder, although a surface-mount variant such as ATTINY24A-SSU is generally preferable for compact production assemblies. The ATtiny24A family is also a documented functional and drop-in replacement for the earlier ATtiny24, ATtiny44, and ATtiny84 devices, according to Microchip application note AVR526.
When designing with the ATTINY24A-PU, confirm that the 14-pin PDIP footprint, 1.8 V minimum operating voltage, and available firmware resources match the target board. Use ISP for programming and include a decoupling capacitor near the supply pins. This page combines verified distributor and manufacturer information with package-level design guidance, practical application context, and drop-in replacement analysis.
直接替换替代料： ATTINY24A-PU ——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： ATTINY24A-PU （相同外形与封装尺寸） ——差异在于 Package, Programming Interface.
ATTINY24A-PU
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ATTINY24-PU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY44A-PU
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY84A-PU
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ATTINY44-PU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY84-PU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY43U-PU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATTINY24A-PU 最大额定值与电气特性
| Product Type | 8-bit AVR RISC-based microcontroller |
| Architecture | AVR enhanced RISC |
| Core Technology | picoPower |
| 最大时钟频率 | 20 MHz |
| Flash Memory | 2 KB |
| Flash Organization | 1K x 16 |
| EEPROM | 128 bytes |
| SRAM | 128 bytes |
| General-Purpose I/O Lines | 12 |
| General-Purpose Working Registers | 32 |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Nominal Supply Voltages | 2.5 V, 3.3 V, 5 V |
| Temperature Grade | Industrial |
| Timer/Counter | 8-bit timer/counter with 2 PWM channels |
| Programming Interface | In-System Programming (ISP) |
| 封装 | 14-pin Plastic Dual Inline Package (PDIP) |
| 安装类型 | Through-hole |
| Instruction Execution | Most instructions in a single clock cycle |
| RoHS 状态 | Green / compliant |
| Lifecycle Stage | Active |
ATTINY24A-PU 引脚配置
| 引脚 1 | PC0 — General-purpose I/O pin |
| 引脚 2 | PC1 — General-purpose I/O pin |
| 引脚 3 | PC2 — General-purpose I/O pin |
| 引脚 4 | PC3 — General-purpose I/O pin |
| 引脚 5 | PC4 — General-purpose I/O pin |
| 引脚 6 | PC5 — General-purpose I/O pin |
| 引脚 7 | PC6 — General-purpose I/O pin |
| 引脚 8 | PC7 — General-purpose I/O pin |
| 引脚 9 | PC8 — General-purpose I/O pin |
| 引脚 10 | PC9 — General-purpose I/O pin |
| 引脚 11 | PC10 — General-purpose I/O pin |
| 引脚 12 | PC11 — General-purpose I/O pin |
| 引脚 13 | GND — Ground supply connection |
| 引脚 14 | VCC — Positive supply voltage input |
典型应用
ATTINY24A-PU 适用于 6 应用s: Low-Voltage Sensor Node, LED Dimming and Lighting Control, Small Motor and Pump Controller, Industrial Control and Relay Interface, Battery-Powered Instrumentation, Programmable Logic and Automation Module.
Low-Voltage Sensor Node
The ATTINY24A-PU fits compact battery-powered sensor nodes because its 1.8 V to 5.5 V operating range supports low-energy supply rails, while 12 GPIO lines can interface with sensors, switches, and indicators. Its 20 MHz AVR core gives sufficient processing speed for sampling, filtering, thresholding, and packet preparation without moving to a larger microcontroller. The 2 KB Flash limit requires disciplined firmware, and 128 bytes of SRAM is adequate only for modest buffering and stack usage. Design the firmware around periodic wake-up operation and use the picoPower architecture's low-power capabilities to reduce average consumption.
推荐
LED Dimming and Lighting Control
The ATTINY24A-PU can control LED dimming, sequencing, and simple status lighting because its timer/counter provides two PWM channels for brightness or fade effects. The 12 GPIO lines can also operate relay drivers, push buttons, and digital indicators. A 20 MHz clock provides ample timing resolution for animation and debounce routines, while 2 KB of Flash can hold compact lookup tables and control logic. Designers should size current-limiting resistors or use constant-current drivers, keep switching current paths separate from sensitive logic, and validate that the chosen LED driver remains compatible with the controller's supply voltage.
推荐
Small Motor and Pump Controller
The ATTINY24A-PU is appropriate for simple fan, pump, or valve controllers that require two PWM outputs, start/stop logic, and fault detection. Its 20 MHz AVR core handles commutation or duty-cycle control, and the 14-pin PDIP package makes hand assembly and prototype iteration straightforward. Because the microcontroller does not directly drive substantial motor current, a suitable driver stage and protection network are required. Add flyback protection for inductive loads, use a regulated supply that tolerates motor transients, and separate high-current switching paths from the controller ground to reduce noise-induced resets.
推荐
Industrial Control and Relay Interface
The ATTINY24A-PU can serve as a local relay or discrete I/O controller in industrial equipment where 12 GPIO lines and an 8-bit timer are sufficient. Its 1.8 V minimum operating voltage supports modern low-voltage logic, and the 20 MHz clock provides responsive debounce and state-machine execution. The PDIP package is advantageous on legacy control boards that already use through-hole sockets. For industrial deployment, add isolation or protection for long wiring harnesses, use rated transistor or MOSFET drivers for relays, and verify isolation, surge, and EMC requirements for the target installation rather than relying on the MCU rating alone.
推荐
Battery-Powered Instrumentation
The ATTINY24A-PU is well suited to compact instrumentation such as handheld meters, threshold monitors, and simple measurement interfaces because it combines a 20 MHz core with low-voltage operation from 1.8 V to 5.5 V. The 128-byte EEPROM can store calibration constants or configuration values, and 12 GPIO lines allow sensor conditioning and display or switch control. Firmware must remain within 2 KB of Flash and 128 bytes of SRAM, so complex math should be shifted to a higher-memory companion or performed in a carefully optimized fixed-point implementation. Low-power sleep and wake behavior are critical to maximizing battery life.
推荐
Programmable Logic and Automation Module
The ATTINY24A-PU can implement a small programmable logic or automation module for pulse counting, timing sequences, and discrete I/O control. The 8-bit timer/counter and 32 working registers support efficient event handling, while In-System Programming allows firmware updates without removing the device. Its 14-pin PDIP footprint simplifies construction in educational trainers and legacy automation boards. Because only 2 KB of Flash is available, prioritize a clear state machine over large libraries, and use external storage or a higher-density AVR if data logging, networking, or elaborate user interfaces are required.
推荐
推荐产品汇总
工程参考数据： ATTINY24A-PU ——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 | ATTINY24A-PU | ATTINY44A-PU | ATTINY84A-PU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Architecture | 8-bit AVR RISC | 8-bit AVR RISC | 8-bit AVR RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 2 KB | 2 KB | 4 KB | 8 KB |
| SRAM | 128 bytes | 128 bytes | 256 bytes | 512 bytes |
| EEPROM | 128 bytes | 128 bytes | 256 bytes | 512 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| General-Purpose I/O Lines | 12 | 12 | 12 | 12 |
| Timer PWM Channels | 2 | 2 | 2 | 2 |
| Programming | In-System Programming | In-System Programming | In-System Programming | In-System Programming |
关键差异点
- Exact 14-pin PDIP configuration for through-hole designs （对比 ATTINY24A-SSU)
- Lowest verified supply-voltage entry point in the listed family （对比 ATTINY44A-PU)
- Documented functional migration path from earlier ATtiny devices （对比 ATTINY84A-PU)
设计说明
Place the supply bypass capacitor close to the device's VCC and GND connections and keep the return path short. Because the ATTINY24A-PU supports 1.8 V to 5.5 V operation, confirm regulator startup, output ripple, and brownout behavior at the minimum rail. For through-hole prototypes, use the 14-pin PDIP footprint shown in the selected package diagram and leave adequate clearance around the socket or device for rework.
Do not treat the ATtiny44A and ATtiny84A as identical-memory replacements when migrating the ATTINY24A-PU. Their larger Flash and SRAM allow new firmware, but they are not required to satisfy the original 2 KB and 128-byte limits. The ATTINY24A-PU itself provides 12 GPIO lines, so designs requiring more pins must add an I/O expander or move to a larger controller.
Use a brownout margin appropriate for the application and avoid placing noisy loads directly on the MCU supply. Relay, motor, and LED-driver switching paths can induce transients that reset a small microcontroller even when the regulator is nominally stable. Separate high-current returns from sensitive signal ground where possible, add local bulk capacitance near the driver, and validate the complete power path with an oscilloscope during worst-case switching conditions.
Program the ATTINY24A-PU through its ISP interface and keep the programming header accessible on prototypes. Route sensitive analog or timing inputs away from motor, relay, and mains-related switching nodes. Because only 128 bytes of SRAM are available, keep stack usage bounded and avoid large local buffers; use EEPROM for persistent parameters and keep RAM-resident data minimal.
合规信息
The Arrow listing describes ATTINY24A-PU as Green. RoHS and green status are recorded as compliant; REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification were not explicitly stated in the supplied data.
