ATTINY828-MU - 8-Bit 20MHz AVR MCU | Microchip Technology
Référence : ATTINY828-MU ✓ ActifATTINY828-MU Présentation
An 8-bit AVR microcontroller is a compact embedded-control component that combines a reduced-instruction-set processor core with Flash program memory, data EEPROM, SRAM and integrated peripherals. Within the product hierarchy, ATTINY828-MU is an ATtiny-series microcontroller, part of the broader AVR family and semiconductor category. Its architecture supports efficient instruction execution and broad GPIO availability in a package intended for compact surface-mount designs.
Key device features include 8 KB of ISP Flash, 256 bytes of ISP EEPROM, 512 bytes of internal SRAM and execution up to 20 MHz. The peripheral set includes a 10-bit ADC, USART, TWI, two SPI interfaces, an 8-bit timer/counter and a 16-bit timer/counter with PWM. A ±2% accurate 8 MHz internal oscillator supports clock-based control, while a 32.768 kHz ultra-low-power oscillator is available for low-speed timing.
The 28 GPIO pins can be used for digital inputs, outputs and peripheral multiplexing, and the manufacturer states that ADC channels are available on all pins. Two SPI interfaces can support external sensors or serial peripherals, while USART and TWI provide additional wired communication paths. debugWIRE enables on-chip debugging, reducing the tooling required for firmware development and field diagnosis.
Typical uses include industrial sensor nodes, compact control panels, small motor-control functions, communications modules and low-power embedded products. For a design using an external sensor, the dual SPI capability can reduce serial-bus contention, and the 10-bit ADC can digitize analog inputs. PWM-capable timers support dimming, actuator positioning or proportional control, provided the selected pin multiplexing is compatible with the chosen function.
Design consideration: the 32-VQFN footprint requires careful PCB layout, short signal paths and adequate thermal-copper allocation around the exposed pad. Confirm pin multiplexing, ADC input availability, clock requirements and programming connections against the manufacturer documentation before release. Because package drawing, exposed-pad dimensions and detailed electrical limits are not included in the supplied verified text, those implementation details require confirmation from the official datasheet.
Alternatives de remplacement direct pour ATTINY828-MU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ATTINY828-MUR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY828-MU Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit AVR RISC-based microcontroller |
| Architecture | AVR |
| Fréquence d'horloge maximale | 20 MHz |
| Program Memory | 8 KB Flash (8K x 8) |
| EEPROM | 256 B |
| Internal SRAM | 512 B |
| ADC Resolution | 10 bit |
| GPIO Count | 28 |
| Serial Interfaces | 1 USART, 1 TWI, 2 SPI |
| Timer Counters | 1 x 8-bit, 1 x 16-bit with PWM |
| Internal Oscillator | 8 MHz, ±2% accuracy |
| Ultra-Low-Power Oscillator | 32.768 kHz |
| Debug Interface | debugWIRE |
| Operating Voltage | 3.3 V / 5 V |
| Boîtier | 32-pin VQFN (5 x 5 mm) with exposed pad |
| Type de montage | Surface mount |
| Statut RoHS | unknown |
| REACH Status | unknown |
Guide de configuration des broches du ATTINY828-MU 32-pin vqfn (5 x 5 mm) with exposed pad
Configuration des broches du ATTINY828-MU (boîtier 32-pin vqfn (5 x 5 mm) with exposed pad). 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 ATTINY828-MU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATTINY828-MU convient pour 6 applications: Industrial Sensor Node, Low-Power Environmental Monitor, Compact Motor and Actuator Control, Local Communications Module, LED Dimming and Display Control, Programmable Logic Controller.
Industrial Sensor Node
The ATTINY828-MU fits compact industrial sensor nodes because it combines a 10-bit ADC, 28 GPIO, two SPI interfaces and 20 MHz processing in a 5 x 5 mm VQFN package. A designer can connect analog sensing circuitry directly to ADC-capable pins while using one SPI interface for a sensor and the other for a local peripheral. The 8 KB Flash store supports moderate embedded logic, while USART and TWI provide paths to local controllers and sensors. Its picoPower implementation and 32.768 kHz ultra-low-power oscillator are also useful for duty-cycled monitoring, although numeric sleep-current and wake-up limits require confirmation from the official electrical characteristics.
Recommandé
Low-Power Environmental Monitor
The ATTINY828-MU is suitable for a low-power environmental monitor that periodically measures an analog quantity and stores or transmits the result. Its 10-bit ADC supports digitizing sensor output, and its 256-byte EEPROM plus 512-byte SRAM provide limited local configuration and working memory. The 32.768 kHz ultra-low-power oscillator supports timekeeping, while picoPower technology provides the intended low-power platform. Design the firmware around duty-cycled acquisition, confirm sleep and active current from the manufacturer datasheet, and account for sensor, pull-up and regulator quiescent current when calculating battery life.
Recommandé
Compact Motor and Actuator Control
The ATTINY828-MU can support compact actuator and motor-control functions where board area is constrained. Its 16-bit timer/counter with PWM provides a timing resource for proportional control or simple drive modulation, while the 8-bit timer/counter supports general periodic tasks. With 28 GPIO and a 20 MHz maximum clock, the MCU can coordinate inputs, drive indicators and supervise a power stage. The exposed-pad VQFN construction requires a carefully routed PCB and adequate copper for heat spreading. Confirm pin-muxing, timer-channel assignments and thermal limits against the manufacturer documentation before connecting external drive circuitry.
Recommandé
Local Communications Module
The ATTINY828-MU is appropriate for a small communications endpoint because it provides USART, TWI and two SPI interfaces. Designers can use SPI for a radio or storage peripheral, TWI for short-distance sensor and accessory buses, and USART for a host interface or diagnostics link. The 20 MHz AVR core and 8 KB of Flash provide enough room for modest protocol handling, while 28 GPIO can support module-control and status signals. Because no wireless transceiver is integrated, radio certification and RF layout remain separate engineering tasks. Buffering, logic levels and bus timing should be validated against the connected peripheral documentation.
Recommandé
LED Dimming and Display Control
The ATTINY828-MU can implement compact LED dimming, status indication or small display-control functions using its PWM-capable timer/counter and 28 GPIO. A designer can drive LEDs through external transistors or driver circuitry while retaining GPIO for buttons, indicators and serial commands. The 8-bit timer/counter handles general timing, while the 16-bit timer/counter provides PWM resolution for brightness adjustment. Because the MCU does not directly specify external LED-drive current, component selection must account for supply voltage, peak current and thermal dissipation. Keep high-current switching paths away from sensitive analog inputs and verify the exposed-pad copper arrangement during layout.
Recommandé
Programmable Logic Controller
The ATTINY828-MU is suited to small embedded control panels and machine-interface modules that need discrete inputs, outputs and simple serial coordination. Its 28 GPIO support digital sensing and control, while the 10-bit ADC can cover analog supervision signals. USART and TWI enable connection to human-interface or expansion modules, and the two SPI interfaces provide additional peripheral options. The 8 KB Flash limit requires disciplined firmware organization for larger control functions, and the 512-byte SRAM should be checked against buffering requirements. Validate electrical levels, isolation boundaries and watchdog strategy before using it in safety-relevant industrial equipment.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATTINY828-MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATTINY828-MUR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5 x 5 mm) with exposed pad | 32-VQFN (5 x 5 mm) |
| Architecture | 8-bit AVR RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Flash Memory | 8 KB | 8 KB |
| EEPROM | 256 B | 256 B |
| Internal SRAM | 512 B | 512 x 8 B |
| ADC Resolution | 10 bit | 10 bit |
| GPIO Count | 28 | 28 |
Principaux différenciateurs
- Dense peripheral integration in a compact package (vs ATTINY828-MUR)
- ADC-capable GPIO platform (vs ATTINY828-MUR)
- Compact low-power timing resources (vs ATTINY828-MUR)
Notes de conception
Use the manufacturer’s 32-VQFN land pattern and exposed-pad recommendation rather than treating the package as a generic 32-lead QFN. The supplied verified text confirms a 5 x 5 mm VQFN with an exposed pad but does not provide pad dimensions, so those values must be taken directly from the official package drawing. Preserve solder-mask and paste design rules exactly. Confirm whether the exposed pad connects to ground before finalizing copper pours and assembly documentation.
Keep analog sensing paths associated with the 10-bit ADC short and isolate them from switching nodes and high-current digital outputs. The 28 available GPIO increase pin-multiplexing flexibility, but every selected ADC or communication function must match the official pin table. Route USART, TWI and SPI signals away from potential clock and PWM sources. The two SPI interfaces should be assigned according to bus speed and peripheral requirements rather than by assuming arbitrary pin interchangeability.
Budget the complete board supply rather than the ATTINY828-MU alone. The verified data identifies 3.3 V and 5 V operation, picoPower technology and a 32.768 kHz ultra-low-power oscillator, but it does not provide numeric active or sleep currents. Confirm the electrical operating range and decoupling recommendations in the official datasheet. Include sensor, interface and regulator losses, then validate the assembled design at the voltage, temperature and workload required by the application.
Do not treat a comparison-tool result as proof of drop-in compatibility. Even when an alternative uses the same 32-VQFN outline, engineers must verify pin numbering, exposed-pad connection, voltage tolerance, clock limits, memory and peripheral functions before replacing an MCU. The supplied data supports ATTINY828-MUR as the same-family option, but complete ordering-code and electrical details are absent. Also avoid assuming that all 28 GPIO can simultaneously operate as ADC inputs because their multiplexed functions may conflict.
Informations de conformité
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or package type.
