AT90CAN32-16MU - 16MHz AVR CAN MCU | Microchip Technology
Référence : AT90CAN32-16MU ✓ ActifAT90CAN32-16MU Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, memory, communication peripherals, and I/O into one package. The AT90CAN32 belongs to the AVR family of 8-bit RISC microcontrollers and sits within the broader embedded-control hierarchy of microcontroller ICs. Its enhanced RISC architecture supports efficient instruction execution, while dedicated CAN hardware reduces the processing burden associated with communicating over a robust vehicle or industrial network.
The AT90CAN32 family combines CAN controller support with read-while-write flash operation, EEPROM, and SRAM. The -16MU configuration is specified for 16 MHz operation and includes 32 KB of flash. Its communication peripherals allow one controller to coordinate CAN traffic with serial, synchronous, and serial peripheral interfaces. Brown-out detection, reset, pulse-width modulation, and watchdog functions support dependable control-system behavior. The 53 I/O lines provide substantial connectivity for sensors, actuators, status indicators, and external interface circuits.
This controller is particularly suitable for industrial automation, building controls, automotive subsystems, embedded data acquisition, motor-control interfaces, and CAN-connected sensors. Its 64-QFN package supports compact board layouts, but the exposed thermal-pad and exposed-pad requirements should be followed exactly. The small pitch also makes careful PCB trace planning essential for reliable assembly and testability.
When designing around the AT90CAN32-16MU, confirm the external clock, CAN transceiver, termination, decoupling, programming interface, and reset circuitry against the manufacturer datasheet. A CAN bus requires a physical transceiver such as the SN65HVD37D, and correct termination at both ends of the network is necessary for reliable operation. Firmware should also include CAN error handling, bus-off recovery, and watchdog service routines.
This product page combines the manufacturer specifications, documented package characteristics, practical interface guidance, and verified drop-in substitution information. It is intended to help engineers determine whether the 16 MHz AVR CAN controller matches the required memory, interface, package, and environmental constraints before committing a board design to production.
Alternatives de remplacement direct pour AT90CAN32-16MU — 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 AT90CAN32-16MU (même facteur de forme et même empreinte) — différant par Package, Mounting Type, CAN Controller, General-Purpose I/O Lines, General-Purpose Working Registers.
AT90CAN32-16MUR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AT90CAN32-16MU Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit RISC Flash Microcontroller with CAN Controller |
| Processor Architecture | AVR Enhanced RISC |
| Largeur du bus de données | 8 bit |
| Maximum Clock Speed | 16 MHz |
| Flash Program Memory | 32 KB (32K x 8) |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| General-Purpose I/O Lines | 53 |
| General-Purpose Working Registers | 32 |
| CAN Controller | CAN 2.0A and CAN 2.0B |
| Serial Interfaces | UART/USART, I2C, and SPI |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Boîtier | 64-QFN (9 x 9 mm) |
| Type de montage | Surface Mount |
| Statut du cycle de vie | Active |
| Statut RoHS | Compliant |
| REACH Status | Compliant |
| Conflict-Free DRC Status | Conflict Free |
Guide de configuration des broches du AT90CAN32-16MU 64-qfn (9 x 9 mm)
Configuration des broches du AT90CAN32-16MU (boîtier 64-qfn (9 x 9 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 AT90CAN32-16MU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AT90CAN32-16MU convient pour 6 applications: Industrial CAN Automation Controller, Automotive CAN Subsystem, Building Control and HVAC Node, Embedded CAN Data Acquisition, Motor and Actuator Interface Node, CAN-Connected Sensor Gateway.
Industrial CAN Automation Controller
The AT90CAN32-16MU fits compact industrial automation nodes that must coordinate sensors, actuators, and remote equipment over a CAN network. Its 16 MHz AVR Enhanced RISC core provides real-time control capability, while the integrated CAN 2.0A and CAN 2.0B controller reduces the software and processor overhead associated with frame handling. With 32 KB of flash, 1 KB of EEPROM, 2 KB of SRAM, and 53 I/O lines, the device can support protocol management, local control logic, diagnostics, and multiple discrete interfaces. Use a compatible 5 V CAN transceiver such as the SN65HVD37D for physical bus signaling, and validate termination, grounding, isolation, and environmental requirements against the final installation.
Recommandé
Automotive CAN Subsystem
The AT90CAN32-16MU is appropriate for compact CAN-based automotive subsystem controllers that need a deterministic 8-bit control path. The 16 MHz AVR core and integrated CAN controller support message-based coordination, while UART, I2C, SPI, timers, PWM, and watchdog functions allow the device to manage local sensors and actuators without a separate communications processor. The 4.5 V to 5.5 V supply and 64-QFN package support space-constrained board construction. In an automotive design, treat the family device as a starting point rather than the complete qualification: verify the exact temperature grade, transient behavior, EMC requirements, AEC-Q100 status, and any regulatory constraints documented for the selected orderable part.
Recommandé
Building Control and HVAC Node
The AT90CAN32-16MU can serve as the communications and supervisory controller in a building-management or HVAC peripheral node. Its 53 general-purpose I/O lines provide ample connections for temperature sensors, status inputs, relay-control outputs, and local indicators, while CAN 2.0A/2.0B support connects the node to a floor-level network. The 32 KB flash accommodates application code, configuration tables, and communication handlers, and the 2 KB SRAM supports buffered protocol processing. The internal UART, I2C, and SPI peripherals can connect local sensors or a display module. Validate the operating-temperature envelope, regulator tolerance, bus topology, and watchdog strategy for the installation environment before production release.
Recommandé
Embedded CAN Data Acquisition
The AT90CAN32-16MU supports compact CAN data-acquisition modules that collect sensor measurements and forward them to a higher-level controller. Its 16 MHz execution rate allows concurrent handling of sampling tasks, protocol processing, and local diagnostics, while 32 KB of flash provides room for acquisition firmware and parameter sets. The 53 I/O lines can accept digital sensor inputs, and the UART, I2C, and SPI interfaces allow expansion with sensors, memory, or a host processor. A CAN transceiver such as the SN65HVD37D bridges the controller logic to the physical bus. For precision measurement chains, add a suitable analog front end or dedicated converter and avoid using the general-purpose I/O pins for noise-sensitive signal acquisition.
Recommandé
Motor and Actuator Interface Node
The AT90CAN32-16MU can act as a local controller for motors, valves, relays, or actuator networks when the design requires a compact distributed architecture. Its PWM, timer, interrupt, and watchdog resources support deterministic control functions, while CAN enables command exchange with a central controller. The 53 I/O lines and multiple serial interfaces provide flexible connectivity to position sensors, driver modules, and diagnostic equipment. Operate the MCU from a regulated 5 V source and isolate high-current or noisy motor circuits from sensitive control traces. Firmware should include defined motor states, command validation, fault flags, communication timeouts, and safe output states following reset or bus failure.
Recommandé
CAN-Connected Sensor Gateway
The AT90CAN32-16MU is well suited to a gateway that converts local sensor and host information into CAN messages. Its 32 KB flash and 2 KB SRAM provide capacity for protocol conversion, filtering, diagnostics, and configuration storage, while the UART, I2C, and SPI peripherals support different sensor ecosystems. A 16 MHz AVR core is suitable for deterministic message preparation and network-error recovery in an embedded gateway. Pair the controller with a compatible transceiver such as the SN65HVD37D and protect the bus interface from electrical transients according to the installation environment. Firmware should implement bus-off recovery, message timeout handling, node-presence monitoring, and a controlled startup sequence.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AT90CAN32-16MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AT90CAN32-16MUR |
|---|---|---|
| Package | 64-QFN (9 x 9 mm) | 64-QFN (9 x 9 mm) |
| Brand | Microchip Technology | Microchip Technology |
| Processor Architecture | AVR Enhanced RISC, 8-bit | AVR Enhanced RISC, 8-bit |
| Maximum Clock Speed | 16 MHz | 16 MHz |
| Flash Program Memory | 32 KB | 32 KB |
| EEPROM | 1 KB | 1 KB |
| SRAM | 2 KB | 2 KB |
| General-Purpose I/O Lines | 53 | 53 |
| CAN Controller | CAN 2.0A and CAN 2.0B | CAN 2.0A and CAN 2.0B |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
Principaux différenciateurs
- Integrated CAN controller in a compact QFN package (vs ATMEGA325PA-MU)
- Same-family replacement with identical core resource ratings (vs AT90CAN32-16MUR)
- Five-volt integration with multiple serial peripherals (vs AT90CAN32-16AU)
Notes de conception
Use the manufacturer package drawing for the 64-QFN (9 x 9 mm) land pattern, exposed pad, solder mask, and paste stencil. Keep high-speed or sensitive traces away from the exposed-pad connection, and provide adequate thermal-via density beneath the package where the recommended layout calls for it. Because the lead pitch is fine, use the assembly facility's accepted pad and stencil geometry and inspect the exposed-pad solder fill after reflow.
Route the CAN receiver and transmitter paths directly between the AT90CAN32-16MU and the external transceiver, keeping the loop area small and avoiding test pads or unrelated high-current traces around those nets. Place transceiver supply and bypass capacitors close to their pins. Keep the CAN bus and ground paths away from switching nodes, motor-drive outputs, and sensitive analog inputs to reduce susceptibility to common-mode and conducted noise.
Design the 4.5 V to 5.5 V supply path so it remains within the device limits at the transceiver, MCU, and any attached loads. Place local bypass capacitors at the supply pins and decouple transceiver and MCU branches according to their individual datasheets. Include a controlled reset and power-monitor strategy so firmware begins from a known state; do not assume the CAN network will be present at startup.
Do not treat a shared package name or matching clock and flash size as proof of drop-in compatibility. The AT90CAN32-16MU and ATMEGA325PA-MU share several headline parameters, but the integrated CAN controller is a critical functional distinction. Likewise, AT90CAN32 family members with TQFP ordering codes are not substitutes for a 64-QFN board. Compare the complete pin list, peripheral set, voltage limits, timing, and thermal requirements before approving a substitution.
Informations de conformité
The AT90CAN32-16MU listing identifies EU RoHS compliance, REACH compliance, and Conflict-Free DRC status. The exact AEC-Q100 qualification, lead-free declaration, and halogen-free declaration are not stated for this orderable suffix.
