ATTINY841-MU - 16MHz 8KB AVR MCU | Microchip Technology
Référence : ATTINY841-MU ✓ ActifATTINY841-MU Présentation
An 8-bit AVR microcontroller is a compact embedded-control device that combines a processor core, nonvolatile Flash program memory, data memory, and peripherals on one semiconductor die. The ATtiny841 belongs to the TinyAVR family within the broader hierarchy of 8-bit microcontroller, embedded controller, and semiconductor products. It is intended for control-oriented designs where deterministic low-power operation, analog measurement, and a small board footprint are more important than high processing throughput.
Key features include a 16 MHz maximum clock, 8 KB of Flash program storage, 512 bytes of SRAM, 512 bytes of EEPROM, and a 10-bit ADC with 12 channels. Its operating-voltage range of 1.7 V to 5.5 V supports both low-voltage battery-powered equipment and conventional 3.3 V or 5 V systems. The 20-pin QFN-EP package also provides a compact surface-mount footprint and an exposed thermal pad for board-level heat spreading.
The ATtiny841 architecture uses the AVR 8-bit instruction set and provides integrated analog and digital resources for embedded control. The manufacturer documents programmable I/O behavior, tri-state input operation, and alternative peripheral functions including analog-comparator, analog-to-digital converter, and pin-change-interrupt capabilities. Programming and debugging are supported through Microchip’s in-circuit programming and debug ecosystem, including MPLAB Snap connectivity described on the official product page.
Typical applications include compact sensor nodes, industrial control modules, low-power instrumentation, digital control panels, compact power converters, and mixed-signal monitoring equipment. The 12-channel ADC allows multiple analog inputs to share one controller, while 8 KB of Flash accommodates application firmware and configuration logic. For designs near the upper voltage limit, designers must also account for supply tolerance, clock configuration, and component derating.
The exposed pad must be connected according to the manufacturer’s land-pattern and thermal guidance rather than treated as an unused pin. PCB layout should preserve short analog and power paths, provide the required decoupling capacitors, and route high-impedance sensor inputs away from noisy switching nodes. Firmware and pin multiplexing should be checked against the linked ATtiny441/ATtiny841 datasheet before a new PCB is released.
This page consolidates the supplied distributor specifications, official manufacturer links, lifecycle information, packaging data, and qualified drop-in considerations. It also distinguishes verified package-compatible alternatives from broader functional equivalents, helping engineers compare migration options without treating devices with different memory, voltage, or peripheral capabilities as interchangeable.
Alternatives de remplacement direct pour ATTINY841-MU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ATTINY84A-MU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATtiny840-MU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATTINY841-MU Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit AVR Microcontroller IC |
| Processor Core | AVR 8-bit |
| Fréquence d'horloge maximale | 16 MHz |
| Flash Memory | 8 KB (8K x 8) |
| SRAM | 512 bytes |
| EEPROM | 512 bytes |
| ADC Resolution | 10 bit |
| ADC Channel Count | 12 channels |
| Operating Voltage Range | 1.7 V to 5.5 V |
| Plage de température de fonctionnement | -40°C to +85°C |
| Boîtier | 20-pin QFN with exposed pad (4 mm x 4 mm) |
| Type de montage | Surface Mount |
| I/O Port | Multi-port GPIO with alternate peripheral functions |
| Analog Comparator | Supported |
| Pin-Change Interrupt | Supported |
| Debug and Programming | ICSP and in-circuit debugging |
| Statut RoHS | Compliant |
| Statut du cycle de vie | In Production |
Guide de configuration des broches du ATTINY841-MU 20-pin qfn with exposed pad (4 mm x 4 mm)
Configuration des broches du ATTINY841-MU (boîtier 20-pin qfn with exposed pad (4 mm 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 ATTINY841-MU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATTINY841-MU convient pour 6 applications: Compact Sensor Nodes, Industrial Control Modules, Low-Power Instrumentation, Digital Control Panels, Compact Power Converters, Mixed-Signal Monitoring Equipment.
Compact Sensor Nodes
The ATTINY841-MU fits compact sensor nodes because its 12-channel, 10-bit ADC can acquire several analog measurements while the 16 MHz AVR core handles filtering, threshold logic, and communication updates. The 8 KB Flash budget is suitable for focused acquisition and control firmware rather than a large protocol stack. Operate the controller within the verified 1.7 V to 5.5 V range and use the 512-byte SRAM carefully. The 4 mm by 4 mm QFN-EP also reduces board area, although its exposed pad requires the prescribed copper and thermal arrangement.
Recommandé
Industrial Control Modules
The ATTINY841-MU is appropriate for small industrial control modules that combine digital inputs, analog monitoring, and local actuator control. Its 16 MHz operating rate supports responsive event handling, while the 8 KB Flash and 512-byte SRAM fit focused state-machine or supervisory firmware. The verified -40°C to +85°C range is useful across industrial equipment, although the enclosure, power supply, and protection network must handle the actual environment. Because GPIO functions can be remapped to the ADC, comparator, and interrupts, pin allocation must be reviewed before finalizing the PCB.
Recommandé
Low-Power Instrumentation
The ATTINY841-MU suits low-power instrumentation that must combine sensor conditioning, digital calibration, and a compact serial interface. Its 1.7 V minimum operating voltage supports low-voltage supply designs, while the 10-bit, 12-channel ADC provides useful measurement resolution without requiring a large external converter. The 512-byte EEPROM can retain calibration or configuration data, but endurance and write-cycle limits must be considered in the firmware. Sleep-mode and active-current figures were not included in the supplied extract, so battery-life estimates should use the manufacturer electrical characteristics.
Recommandé
Digital Control Panels
The ATTINY841-MU can implement a compact digital control panel for status indication, button input, and analog setpoint adjustment. Its 16 MHz AVR core provides sufficient control bandwidth for debouncing, display updates, and menu or state logic while the 8 KB Flash constrains it to modest firmware. The 20-pin QFN-EP footprint helps preserve board area in tightly packaged human-interface modules. Designers should use spare ADC channels for panel potentiometers only if analog multiplexing, reference accuracy, and acquisition timing satisfy the intended user experience.
Recommandé
Compact Power Converters
The ATTINY841-MU is relevant to compact power-converter supervisory circuits where a microcontroller monitors analog feedback, controls discrete compensation, and coordinates enable sequencing. Its 12-channel ADC offers multiple monitoring points, and its 1.7 V to 5.5 V operating range can support low-side or low-voltage control sections. The 16 MHz clock is adequate for supervisory rather than high-performance digital conversion. Protection functions, startup behavior, and analog accuracy must be verified against the manufacturer data because the supplied extract does not specify operating current, ADC accuracy, or timing margins.
Recommandé
Mixed-Signal Monitoring Equipment
The ATTINY841-MU works well in mixed-signal monitoring equipment that measures several analog channels and applies local limits, filtering, or fault logic. Its 10-bit ADC provides a practical balance between measurement capability, processing demand, and package size, while the AVR architecture simplifies deterministic firmware development. The 8 KB Flash is suitable for compact algorithms and configuration tables, whereas the 512-byte SRAM requires disciplined buffer sizing. Keep high-impedance analog traces short and isolated from digital switching paths, and verify whether 10-bit resolution meets the measurement accuracy required by the end product.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATTINY841-MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATTINY84A-MU | ATtiny840-MU |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-20-EP (4x4) | QFN-20-EP (4x4) | QFN-20-EP (4x4) |
| Architecture | 8-bit AVR | 8-bit AVR | 8-bit AVR |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 8 KB | 8 KB | 8 KB |
| ADC | 10-bit, 12 channels | 10-bit with fewer verified channels | Not verified on the ATTINY841-MU |
| Special Feature | 12-channel ADC | Reduced ADC channel count | No equivalent ADC capability identified |
Principaux différenciateurs
- Higher verified analog input count (vs ATTINY84A-MU)
- Matches the compact 8 KB, 16 MHz AVR performance class (vs ATTINY84A-MU)
- Broader supplied operating-range verification (vs ATtiny840-MU)
- Analog functionality without external converter expansion (vs ATtiny840-MU)
Notes de conception
Use the official 4 mm by 4 mm QFN land pattern and connect the exposed pad to the ground plane using the datasheet-prescribed geometry. The EP is not an optional thermal decoration: it is part of the package’s thermal and electrical design. Keep analog inputs away from switching-node copper, preserve short return paths for the ADC, and place decoupling capacitance close to the supply pins. Because the supplied extract does not reproduce the complete pin table, validate every land and route against the official package drawing before fabrication.
Operate the ATTINY841-MU only within its verified 1.7 V to 5.5 V range and check whether the selected clock configuration, ADC use, or peripheral loading imposes tighter limits. Place local decoupling close to the device and route it using a low-impedance path to the power reference. Do not use the ADC readings as an uncalibrated precision reference; account for reference accuracy and noise in the firmware or add an external reference when measurement quality requires it.
Treat a same-package MCU as a drop-in candidate rather than a guaranteed replacement. The ATtiny841’s 12 ADC channels, alternate port functions, interrupt mappings, and peripheral resources must be compared with the proposed alternative. ATtiny84A-MU has a verified 20-pin QFN-EP comparison record but fewer ADC channels, while ATtiny840-MU lacks the ATTINY841-MU’s verified ADC capability. Also avoid treating ATTINY841-MUR as an engineering alternative because it is a reel-ordering variant of the same device.
Plan the PCB around the ATtiny841’s multiplexed GPIO and analog functions. Confirm every assigned pin in the official datasheet, including alternate-function requirements and reset behavior. Keep sensitive analog traces short, provide a quiet analog ground path where appropriate, and avoid routing them beneath or beside high-current switching paths. The package’s small 4 mm by 4 mm footprint supports compact layouts but leaves less room for probe access and rework, so assembly planning should be included during schematic capture.
Informations de conformité
The supplied JLCPCB component record identifies ATTINY841-MU as RoHS compliant. No explicit REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification statements were supplied.
