ATTINY24A-MU - 20MHz 8-Bit AVR MCU | Microchip
부품 번호: ATTINY24A-MU ✓ 활성ATTINY24A-MU 개요
An 8-bit AVR microcontroller is a compact embedded-control semiconductor that combines a RISC processor core, program memory, data memory, timers, serial interfaces, and general-purpose I/O in one package. The ATtiny24A belongs to Microchip's TinyAVR family and uses picoPower technology to support low-power embedded designs. Its combination of modest memory capacity, 12 I/O lines, and PWM-capable timing resources suits compact controllers, interface modules, and small control systems.
The ATtiny24A's principal resources include 2 KB of ISP Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. Twelve I/O lines allow external sensors, actuators, buttons, indicators, and communication interfaces to be connected while retaining a compact package. The 8-bit timer/counter with two PWM channels supports periodic timing, signal generation, motor control, and basic dimming or waveform applications without requiring a separate timer device.
Operating at up to 20 MHz gives the AVR core enough throughput for embedded control loops, protocol handling, and state-machine workloads. ISP programming supports in-circuit firmware updates when the board exposes the programming interface. The 1.8 V to 5.5 V operating-voltage range allows the same controller architecture to be used in low-voltage and conventional 5 V systems, while careful decoupling and signal-level design remain essential at the lower voltage limit.
Typical uses include compact motor controllers, LED drivers, sensor-interface boards, programmable timers, building-control modules, and small industrial or consumer appliances. The 20-pin QFN-EP package supports dense PCB layouts, and its exposed pad provides a direct thermal path to the board. Designers should preserve the pad's soldering and copper requirements while ensuring adequate clearance around adjacent signal pins.
The principal design trade-off is limited memory. Two KB of Flash limits code size, while 128 bytes of SRAM restricts buffered data structures. Applications with larger protocol stacks or touchscreens may require a higher-density AVR or another MCU family. Firmware should use the available registers efficiently, and unused I/O pins should be terminated according to the device pin-description table.
This product page combines the manufacturer specifications, verified distributor listings, package information, family distinctions, and practical design guidance in one place. It also separates true drop-in alternatives from related devices that use different packages or materially different memory configurations, helping engineers make a PCB-safe replacement decision.
드롭인 대체품: ATTINY24A-MU — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청ATTINY24A-MU 최대 정격 & 전기적 특성
| Product Type | 8-bit RISC-based microcontroller |
| Architecture | AVR RISC |
| 최대 클록 주파수 | 20 MHz |
| Program Memory | 2 KB Flash |
| Flash Organization | 1K x 16 |
| EEPROM Memory | 128 bytes |
| SRAM | 128 bytes |
| General-Purpose I/O Lines | 12 |
| General-Purpose Working Registers | 32 |
| Timer/Counter | 8-bit with 2 PWM channels |
| Operating Voltage | 1.8 V to 5.5 V |
| 동작 온도 | -40°C to +85°C |
| 패키지 | 20-QFN-EP (4 x 4 mm) |
| 실장 유형 | Surface mount |
| Programming Interface | In-system programming |
| Low-Power Technology | picoPower |
| Terminal Count | 20 pins |
ATTINY24A-MU 20-qfn-ep (4 x 4 mm) 핀 구성 가이드
ATTINY24A-MU(20-qfn-ep (4 x 4 mm) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: ATTINY24A-MU.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
ATTINY24A-MU 적합 용도: 6 애플리케이션s: Compact Motor Controller, LED Lighting and Dimming, Industrial Sensor Interface, Programmable Timer and Sequencer, Building Control Module, Consumer Appliance Control.
Compact Motor Controller
The ATTINY24A-MU fits compact motor-control boards that require two PWM outputs, digital control inputs, and low-voltage operation from 1.8 V to 5.5 V. Its 8-bit timer/counter can generate PWM for motor speed or position-related functions, while 12 general-purpose I/O lines support limit switches, encoders, status indicators, and control communication. The 20-QFN-EP footprint keeps the controller compact, and the exposed pad provides a direct thermal path from the MCU. Design the external driver for inductive loads, include flyback protection, and confirm that the motor supply can handle startup and stall current without disturbing the microcontroller rail.
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LED Lighting and Dimming
The ATTINY24A-MU is suitable for LED lighting modules requiring two PWM channels, configurable drive patterns, and EEPROM-backed settings. A timer output can control a transistor or LED driver while ordinary I/O lines handle enable inputs, buttons, status LEDs, and a serial configuration interface. Its 1.8 V minimum supply voltage supports compact battery-operated fixtures. Keep high-current LED power outside the MCU supply path, use suitable transistor drive levels, and account for the LED driver's voltage and current requirements. The 2 KB Flash limit favors simple lighting effects and local configuration rather than elaborate animation libraries.
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Industrial Sensor Interface
The ATTINY24A-MU can act as a compact sensor-interface controller when the design uses discrete digital sensors, modest status handling, and a short serial protocol. Its 12 I/O lines provide connections for sensor enables, interrupt inputs, indicators, and external interface signals, while 128 bytes of EEPROM can retain calibration or configuration values. The 20 MHz AVR core handles sampling tasks and state machines efficiently. Keep memory use below the 2 KB Flash limit, avoid large blocking buffers in the 128-byte SRAM, and isolate noisy sensors from sensitive signal paths through grounding and filtering techniques.
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Programmable Timer and Sequencer
The ATTINY24A-MU is appropriate for programmable timers, duty-cycle sequencers, and simple process-control modules because its timer/counter, 12 I/O lines, and EEPROM support periodic events and retained settings. The device can activate outputs, drive indicators, and accept external trigger or interlock signals without a separate logic controller. Its operating range of 1.8 V to 5.5 V permits deployment in both low-voltage portable equipment and conventional control boards. Validate timing accuracy across the intended voltage and temperature range, and use the manufacturer timing specifications when setting crystal, prescaler, or calibration values.
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Building Control Module
The ATTINY24A-MU supports compact building-control modules for switching, sensing, occupancy response, and local status indication. Twelve I/O lines can handle digital inputs and outputs, while the timer provides scheduled events or PWM-based actuator signaling. EEPROM-backed configuration can preserve operating parameters through power cycles, and the 1.8 V to 5.5 V range supports varied controller architectures. The microcontroller should remain isolated from mains-connected circuitry, with appropriately rated switching devices and protection networks handling external loads. Firmware should be compact and use the application watchdog or reset strategy appropriate for unattended operation.
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Consumer Appliance Control
The ATTINY24A-MU is well matched to simple consumer appliances that require local push-button control, status indication, timing, and limited motor or heating outputs. Its 20 MHz AVR core executes the control state machine quickly, and the timer/counter with two PWM channels can support motor speed or power-level functions. The compact 20-QFN-EP package minimizes board area, while picoPower technology supports low-power operating modes. Because Flash and SRAM are limited, the firmware should avoid feature-heavy interfaces and large display libraries. A robust design must include hardware reset behavior, input debouncing, safe-state outputs, and fault handling for overloaded actuators.
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추천 제품 요약
엔지니어링 참조 데이터: ATTINY24A-MU — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Package | 20-QFN-EP (4 x 4 mm) |
| Brand | Microchip Technology |
| Maximum Clock Frequency | 20 MHz |
| Program Memory | 2 KB Flash |
| EEPROM Memory | 128 bytes |
| SRAM | 128 bytes |
| General-Purpose I/O Lines | 12 |
| Operating Voltage | 1.8 V to 5.5 V |
| Timer/Counter | 8-bit with 2 PWM channels |
주요 차별점
- Lower Flash capacity supports firmware-cost optimization (vs ATTINY84A-MU)
- Lower RAM requirement fits deeply embedded control tasks (vs ATTINY44A-MU)
- Six fewer general-purpose I/O lines than the higher-density family member (vs ATTINY88-MUR)
설계 노트
Place input bypass and decoupling capacitors immediately beside the device power pins, and connect the exposed pad to the appropriate ground-plane copper area using the manufacturer land-pattern and solder-mask requirements. Maintain clearance to adjacent pins and avoid unintended thermal coupling from hot regulators or power stages. The compact 4 x 4 mm QFN-EP footprint is placement-sensitive, so use the manufacturer package dimensions rather than approximating the land pattern from the body size.
Design the supply for the complete 1.8 V to 5.5 V operating range and ensure that the chosen clock configuration remains valid across that range. Separate noisy actuator supplies from the MCU rail where practical, and use local filtering at the device rather than relying only on a distant bulk capacitor. Estimated current demand is the sum of the MCU operating current and every attached peripheral; the external circuitry, regulator response, and wiring must tolerate that peak without causing a reset.
Do not treat ATTINY24A-MUR as a separate functional upgrade; it is a related ordering form of the same ATTINY24A device family and primarily changes the supplied packing format. Similarly, ATTINY44A-MU and ATTINY84A-MU use the same compact package family but provide 4 KB and 8 KB of Flash rather than 2 KB. Check the device marking, ordering code, pin table, memory requirement, and programming interface before updating a BOM or reusing an existing PCB footprint.
Keep the ISP programming interface accessible and route programming and reset signals away from sources of fast-edge noise. If a reset or programming pin is also used as an application signal, verify its electrical behavior under every operating state. Provide a stable reference clock when the selected timing configuration requires one, and keep oscillator and sensitive sensor routes short. Firmware should include startup checks and a defined safe output state so an unintended reset cannot leave an actuator continuously active.
규정 준수 정보
The available manufacturer and distributor information does not provide explicit compliance declarations for this ordering code. The Mouser listing identifies the device as green, but that listing alone was not treated as proof of each individual compliance status.
