ATTINY24A-MF - 20MHz 8-Bit AVR MCU | Microchip Technology
部品番号: ATTINY24A-MF ✓ 生産中ATTINY24A-MF 概要
A microcontroller is a programmable semiconductor that integrates a processor core, nonvolatile program memory, working memory, and peripherals on one chip. The ATTINY24A belongs to the TinyAVR family within Microchip's broader 8-bit AVR product hierarchy. Its RISC-based architecture supports efficient control tasks, while ISP Flash permits programming or firmware updates without removing the device from the circuit.
The principal device ratings include a 20 MHz operating frequency, 2 KB of ISP Flash organized as 1K x 16, 128 bytes of SRAM, and 128 bytes of EEPROM. Twelve general-purpose I/O lines support digital interfaces, while the integrated USI and ADC provide analog and serial connectivity. The manufacturer product summary also identifies an 8-bit timer/counter with two PWM channels, enabling dimming, motor-control, and general timing functions.
The ATTINY24A-MF is based on Microchip's AVR architecture with 32 general-purpose working registers and an instruction set designed for efficient single-clock-cycle execution in many operations. Its small memory footprint favors compact control loops, sensor conditioning, simple communication endpoints, and embedded products that do not require the memory or peripheral density of a larger 32-bit MCU.
Typical uses include industrial control modules, building-automation nodes, compact sensor interfaces, motor-speed controllers, LED-lighting controllers, and low-power embedded accessories. The exposed thermal pad improves heat transfer on a PCB, while the small 4 x 4 mm footprint supports space-constrained designs. The manufacturer's product page also identifies MPLAB Snap and ICSP support for programming and debugging workflows.
When laying out the PCB, preserve access to the exposed pad and follow the manufacturer's land pattern, exposed-pad soldering, and decoupling requirements. A low-impedance ground plane and short power connections are important at 20 MHz, while unused inputs should be configured appropriately to avoid unwanted current or signal transitions.
This page consolidates the verified manufacturer and distributor information, pricing as of 2026-10-29, package details, application guidance, and the limited drop-in alternatives that could be confirmed without introducing cross-package or unverified substitute parts.
ドロップイン代替品: ATTINY24A-MF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATTINY24A-MF （同一形状・フットプリント） — 相違点: Flash Memory, Operating Temperature, Package, Product Type, SRAM.
ATTINY24A-MFR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATTINY24A-MF 最大定格＆電気的特性
| Product Type | 8-bit RISC microcontroller |
| Architecture | AVR |
| 最大クロック周波数 | 20 MHz |
| Flash Memory | 2 KB (1K x 16) |
| Flash Programming | In-system programmable |
| EEPROM | 128 byte |
| SRAM | 128 byte |
| General-Purpose I/O Lines | 12 lines |
| General-Purpose Working Registers | 32 registers |
| Timer/Counter | 8-bit timer/counter with two PWM channels |
| Universal Serial Interface | USI |
| Analog-to-Digital Converter | ADC |
| 電源電圧 | 2.5 V, 3.3 V, or 5 V |
| 動作温度 | -40 °C to +125 °C |
| パッケージ | 20-pin WQFN with exposed pad, 4 x 4 mm |
| 実装タイプ | Surface mount |
| Programming and Debugging | ICSP and MPLAB Snap |
ATTINY24A-MF 20-pin wqfn with exposed pad, 4 x 4 mm ピン配置ガイド
ATTINY24A-MF (20-pin wqfn with exposed pad, 4 x 4 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATTINY24A-MF.
詳細は データシート をご参照ください。
主な用途
ATTINY24A-MF の用途: 6 件s: Compact Industrial Sensor Interface, Battery-Powered IoT Sensor Node, LED Dimming and Lighting Control, Motor Speed and Direction Controller, Building Automation Sensor Node, Programmable Embedded Controller.
Compact Industrial Sensor Interface
The ATTINY24A-MF is suitable for a compact industrial sensor interface because it combines 12 general-purpose I/O lines, an integrated ADC, and USI connectivity in a 4 x 4 mm package. The 20 MHz AVR core can execute acquisition sequencing, filtering, threshold decisions, and data framing while its 2 KB ISP Flash holds focused control firmware. A practical implementation would assign sensor inputs through the ADC, use timer channels for sampling or actuator timing, and communicate with a host through USI. The 2.5 V, 3.3 V, and 5 V operating choices support different sensor and interface arrangements, although the -40 °C to +125 °C rating does not remove the need to inspect every external component for the same temperature range.
おすすめ
Battery-Powered IoT Sensor Node
The ATTINY24A-MF fits a small battery-powered IoT sensor node when the endpoint performs limited sensing, thresholding, and low-speed communication rather than heavy data processing. Its 2.5 V minimum listed operating voltage supports low-energy designs, while 128 bytes of SRAM and 2 KB of ISP Flash constrain the firmware to compact buffering and control routines. The MCU's USI and 12 I/O lines can support a sensor interface and low-power status signaling. System-level battery life depends on the selected AVR sleep mode, sensor duty cycle, regulator quiescent current, and board leakage; those values were not supplied and should be verified from the complete manufacturer documentation before sizing the power source.
おすすめ
LED Dimming and Lighting Control
The ATTINY24A-MF is appropriate for compact LED dimming and lighting-control modules because its timer/counter includes two PWM channels and the device provides 12 general-purpose I/O lines. The two PWM outputs can control separate channels or complementary functions when the external load driver permits it, while the AVR core manages current-setpoint logic, fault flags, and user input. Its 20 MHz maximum clock provides additional timing headroom beyond simple on/off control. The MCU is generally used as the control element rather than the power device, so external transistor or LED-driver selection must account for voltage, current, switching loss, and thermal requirements; those external-component parameters are not present in the verified source data.
おすすめ
Motor Speed and Direction Controller
The ATTINY24A-MF can serve as the control MCU in a small motor-speed or direction module because it provides an 8-bit timer/counter with two PWM channels, 12 I/O lines, and a 20 MHz clock. The PWM outputs can command an external H-bridge or low-side driver, while the remaining I/O can handle direction inputs, a limit sensor, or a status indicator. Firmware can implement speed ramps, start and stop behavior, and basic fault handling within the available 2 KB Flash and 128 bytes of SRAM. This is a controller-level use rather than a direct motor-drive solution: transistor selection, current sensing, flyback handling, thermal design, and stall protection must be implemented around the MCU and validated separately.
おすすめ
Building Automation Sensor Node
The ATTINY24A-MF is well matched to a small building-automation sensor node that reads discrete inputs, evaluates environmental or occupancy thresholds, and reports a compact status over a serial link. Twelve I/O lines provide flexible connections for sensors, pushbuttons, indicators, and an interface transceiver, while USI supports a resource-efficient serial communication path. The 4 x 4 mm QFN footprint helps reduce node-board area, and the 3.3 V or 5 V options align with many building-control accessories. For wall-mounted equipment, engineers should still verify the enclosure temperature, humidity exposure, ESD requirements, and isolation requirements; the MCU's -40 °C to +125 °C rating describes device temperature operation, not the complete installed system's environmental capability.
おすすめ
Programmable Embedded Controller
The ATTINY24A-MF works as a programmable embedded controller for compact products requiring a small state machine, event handling, and a modest amount of nonvolatile configuration storage. Its 2 KB ISP Flash can retain application firmware, 128 bytes of EEPROM can preserve limited calibration or setup values, and 128 bytes of SRAM supports lightweight working data. The 12 I/O lines allow the controller to operate user buttons, status LEDs, latches, and external interfaces. ICSP support permits firmware updates on an assembled board when programming access is routed correctly. Because memory is limited, applications requiring large buffers, extensive libraries, or complex networking should use a higher-memory AVR or another MCU family rather than relying on an unverified software workaround.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATTINY24A-MF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATTINY24A-MFR |
|---|---|---|
| Package | 20-QFN-EP (4x4) | 20-QFN-EP (4x4), tape and reel |
| Brand | Microchip Technology | Microchip Technology |
| Architecture | 8-bit AVR RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Flash Memory | 2 KB (1K x 16) | 2 KB |
| EEPROM | 128 byte | 128 byte |
| SRAM | 128 byte | 128 byte |
| General-Purpose I/O | 12 lines | 12 lines |
| Supply Voltage | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C |
| Shipment Format | Tray | Tape and reel |
主な差別化要因
- Exact electrical and package match （vs ATTINY24A-MFR)
- Compact exposed-pad footprint （vs ATTINY44A-SSU)
- Purpose-built compact control resource balance （vs ATTINY84A-SSU)
設計ノート
Follow Microchip's recommended 20-pin QFN land pattern and exposed-pad solder process exactly; the verified package is 4 x 4 mm and includes a thermal and electrical exposed pad. Provide short, low-impedance connections from the device supply pins to the supply network and from ground pins to a continuous ground plane. Place required decoupling capacitors close to their associated pins using the manufacturer guidance, and avoid placing noisy switching traces beneath the MCU footprint.
At a maximum clock of 20 MHz, treat clock, programming, reset, and high-speed serial traces as potentially sensitive even though the ATTINY24A-MF is a compact 8-bit controller. Keep the clock route short, provide a stable return path, avoid splitting the ground plane beneath the QFN, and keep ICSP programming nets accessible without long loops. Verify final signal integrity and EMC behavior on the completed board rather than relying only on the nominal clock rating.
Select the external supply and decoupling network for the intended 2.5 V, 3.3 V, or 5 V operating condition. In battery-powered designs, include the regulator's quiescent current and the MCU's active and sleep-mode consumption in the energy budget. Verify startup, brownout behavior, and I/O voltage limits against the current Microchip datasheet because the summarized evidence establishes supported voltage choices but does not provide detailed threshold or leakage values.
Do not treat a shared package drawing as proof of drop-in compatibility without checking every numbered pin, the exposed pad, power pins, reset behavior, programming pins, and peripheral assignments. The supplied comparison identifies ATTINY44A-SSU and ATTINY84A-SSU, but their SU ordering denotes a different package family from the MF part. Treat those devices as redesign candidates rather than solder-in replacements. Likewise, budget the ATTINY24A-MF's limited 2 KB Flash and 128-byte SRAM before committing to firmware.
コンプライアンス情報
The verified manufacturer and distributor snippets do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. No compliance claims were inferred.
