ATTINY44A-MF - 20MHz 8-bit AVR MCU | Microchip Technology
Référence : ATTINY44A-MF ✓ ActifATTINY44A-MF Présentation
A microcontroller is a programmable integrated circuit containing a processor core, memory, and peripherals on one die. The AVR architecture belongs to the broader embedded-controller hierarchy, where an 8-bit RISC core executes compact control firmware. The ATtiny44A is specifically positioned for cost-sensitive embedded products requiring more computation and I/O than the smallest ATtiny devices but requiring less complexity and cost than larger 32-bit microcontrollers.
The ATtiny44A provides 4 KB of Flash for program storage, 256 bytes each of SRAM and EEPROM, and 32 general-purpose working registers. Its 12 GPIO lines support digital interfaces, while the timer peripherals provide timing, counting, and PWM functions. The manufacturer identifies picoPower technology as a core feature, supporting low-power operation for battery-powered and energy-conscious equipment. The 20 MHz maximum clock rate gives embedded designers substantially more processing headroom than lower-speed 8-bit alternatives.
The device combines an AVR instruction-set processor with on-chip Flash, SRAM, EEPROM, GPIO, timers, and serial interfaces. This integration reduces external component count and keeps firmware and control signals within one device. A 4 x 4 mm QFN package with an exposed pad supports compact PCB layouts, but the exposed-pad thermal and layout requirements must be followed to achieve reliable electrical and thermal performance.
Typical uses include compact motor controllers, sensor nodes, lighting controls, battery-management equipment, industrial accessories, and low-cost consumer products. Its 12 GPIO lines are useful for buttons, indicators, logic-level sensors, and discrete actuators, while PWM outputs can support dimming, proportional control, or simple motor-drive functions.
Designers should confirm the exact pin assignments and exposed-pad connection from the manufacturer datasheet before layout release. Input pins, supply rails, decoupling, programming access, and the exposed pad require deliberate PCB planning. Firmware and peripheral selection should also be validated against the specific ATtiny44A variant rather than inferred solely from the ATtiny24A/44A/84A family name.
This page combines verified manufacturer and distributor information, practical application guidance, package details, and a parameter-focused comparison. It is intended to support faster engineering selection while clearly separating documented facts from data that still requires confirmation from the manufacturer datasheet.
Alternatives de remplacement direct pour ATTINY44A-MF — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATTINY44A-MF (même facteur de forme et même empreinte) — différant par Flash Memory, Operating Temperature, Package, Product Type, SRAM.
ATTINY24A-MF
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ATTINY84A-MF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATTINY441-MF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATTINY44A-MF Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit AVR RISC-based microcontroller |
| Maximum Clock Speed | 20 MHz |
| Flash Memory | 4 KB (2K x 16) |
| EEPROM Memory | 256 bytes |
| SRAM | 256 bytes |
| General-Purpose I/O Lines | 12 lines |
| General-Purpose Working Registers | 32 registers |
| 8-Bit Timer/Counter | 1 timer/counter with 2 PWM channels |
| 16-Bit Timer/Counter | 1 timer/counter |
| Core Architecture | AVR 8-bit RISC |
| Low-Power Technology | picoPower |
| Boîtier | 20-QFN-EP (4 x 4 mm) |
| Nombre de broches | 20 pins |
| Type de montage | Surface mount |
| Température de fonctionnement | -40C to +125C |
| Programming Interface | In-system programming (ISP) |
| Statut RoHS | Compliant |
| Lead-Free Status | Lead-free |
Guide de configuration des broches du ATTINY44A-MF 20-qfn-ep (4 x 4 mm)
Configuration des broches du ATTINY44A-MF (boîtier 20-qfn-ep (4 x 4 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATTINY44A-MF.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATTINY44A-MF convient pour 6 applications: Battery-Powered Sensor Nodes, Small Motor and PWM Control, LED Lighting and Dimming, Industrial Sensor Interface, Consumer Accessories and Keypads, Programmable Logic Controller.
Battery-Powered Sensor Nodes
The ATTINY44A-MF fits compact sensor nodes because it combines a 20 MHz AVR processor, 4 KB of ISP Flash, 256 bytes of SRAM, and 12 GPIO lines without requiring a separate processor. It can acquire data from digital sensors, process the result locally, and control an indicator or communication interface. Its picoPower architecture supports low-power product designs, while sleep-mode behavior can reduce energy use between measurements. The 20-QFN-EP package also reduces board area, although exposed-pad layout and decoupling require careful PCB execution. For battery life, engineers should compare sleep current, active duration, regulator losses, and sensor duty cycle rather than relying on processor frequency alone.
Recommandé
Small Motor and PWM Control
The ATTINY44A-MF is suitable for small motor, valve, and proportional actuator control because its timers provide an 8-bit timer/counter with two PWM channels and a 16-bit timer/counter. The 12 GPIO lines can accept position sensors, limit switches, and control inputs while driving external transistor stages. A 20 MHz clock provides useful response time for debouncing, timing, and closed-loop control. The MCU cannot directly supply motor current, so the design must include suitable driver transistors, flyback protection, and current limiting. Firmware should also constrain acceleration or duty-cycle changes to protect mechanical and thermal limits.
Recommandé
LED Lighting and Dimming
The ATTINY44A-MF can implement compact LED dimming and lighting effects using its timer PWM channels and 12 GPIO lines. The 20 MHz AVR core provides enough timing resolution for common dimming schemes, while 4 KB of Flash accommodates effects, calibration, and user-interface logic. Lighting applications should keep high-current LED drive stages separate from the microcontroller and use transistor or constant-current driver circuitry with appropriate protection. Firmware can support brightness levels, fade sequences, fault handling, and push-button control. For mains-connected equipment, the low-voltage MCU should remain isolated from hazardous energy, and the complete lighting subsystem must meet the applicable safety requirements.
Recommandé
Industrial Sensor Interface
The ATTINY44A-MF is appropriate for compact industrial sensor interfaces that require local conditioning, digital control, and limited data processing. Its 12 GPIO lines can support digital sensors, discrete inputs, status LEDs, and logic-level actuator commands, while the 20 MHz processor can perform calibration and threshold logic. The 20-QFN-EP 4 x 4 mm footprint supports dense control boards, and picoPower technology can assist with duty-cycled energy reduction. Deployment near motors or switching equipment still requires careful grounding, filtering, and isolation. The supplied data does not establish industrial certification, so qualification requirements must be assessed separately for the finished equipment.
Recommandé
Consumer Accessories and Keypads
The ATTINY44A-MF can manage keypads, buttons, indicators, and simple user interfaces in compact consumer accessories. Twelve GPIO lines provide ample connections for tactile switches, LED feedback, and peripheral control, while 256 bytes of SRAM supports short-term state handling. The 4 KB Flash capacity is suitable for debouncing, lighting patterns, configuration storage, and basic product behavior. A 20 MHz AVR core supports responsive interaction without a complex operating system. Product designers should add ESD protection for exposed connectors and ensure that switch bounce, debounce timing, and standby current are validated against the intended user experience and battery target.
Recommandé
Programmable Logic Controller
The ATTINY44A-MF can serve as the central controller in a small programmable logic or interlock module. Its 12 GPIO lines, two PWM channels, 16-bit timer/counter, and 4 KB Flash are useful for sequencing discrete inputs and outputs, timing events, and driving indicators. The 20 MHz AVR architecture enables responsive state-machine control without an RTOS. Because the MCU operates from a limited supply range, the power subsystem should provide regulated voltage and stable decoupling. For machinery or safety-related control, the MCU alone is not a certified safety solution; redundant sensing, watchdogs, fail-safe outputs, and applicable machine-safety validation remain necessary.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATTINY44A-MF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATTINY24A-MF | ATTINY84A-MF | ATTINY441-MF |
|---|---|---|---|---|
| Package | 20-QFN-EP (4 x 4 mm) | 20-QFN-EP (4 x 4 mm) | 20-QFN-EP (4 x 4 mm) | 20-QFN-EP (4 x 4 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core Architecture | AVR 8-bit RISC | AVR 8-bit RISC | AVR 8-bit RISC | tinyAVR 1-series |
Principaux différenciateurs
- Balanced 4 KB program-memory configuration (vs ATTINY24A-MF)
- Smaller memory footprint than the 8 KB family member (vs ATTINY84A-MF)
- 12 GPIO lines in a compact 4 x 4 mm package (vs ATTINY441-MF)
Notes de conception
Follow the manufacturer package drawing for the 20-QFN-EP exposed-pad connection and thermal-via pattern. Place input and output decoupling capacitors close to their associated supply pins, provide a continuous ground reference beneath the package where recommended, and route sensitive programming or communication signals away from high-current switching nodes. The supplied data confirms the package and pin count but does not include the pin table or land pattern, so the latest Microchip package drawing must control the final layout.
Design the supply rail for the verified operating range and place local bypass capacitance at the MCU pins. If the device operates from a switching source, separate or filter the regulator output so switching ripple does not disturb sensitive measurements. Energy-sensitive products should use the AVR's documented sleep modes, disable unused peripherals, and measure the complete sensor-and-communication duty cycle. Actual current consumption and regulator efficiency were not provided in the verified data and must be measured or obtained from the datasheet.
Do not assume that a shared ATtiny24A/44A/84A footprint guarantees identical behavior. The alternatives differ in Flash capacity, memory organization, and available peripherals, and ATTINY441-MF uses the newer tinyAVR 1-series architecture. Before substituting a part, check the numbered pin functions, ADC resources, timer channels, serial peripherals, fuse defaults, programming method, and toolchain support. A successful PCB fit alone is insufficient evidence of drop-in software compatibility.
Informations de conformité
The verified TrustCompo distributor result identifies the ATTINY44A-MF as RoHS-compliant and lead-free. AEC-Q100, REACH, halogen-free, and conflict-minerals status are not established by the supplied data.
