AT90CAN32-16MU - 16MHz AVR CAN MCU | Microchip Technology
料号： AT90CAN32-16MU ✓ 量产中AT90CAN32-16MU 概述
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.
直接替换替代料： AT90CAN32-16MU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AT90CAN32-16MU （相同外形与封装尺寸） ——差异在于 Package, Mounting Type, CAN Controller, General-Purpose I/O Lines, General-Purpose Working Registers.
AT90CAN32-16MUR
✅ 直接替换📋 参考替代料（不在目录中）
AT90CAN32-16MU 最大额定值与电气特性
| Product Type | 8-bit RISC Flash Microcontroller with CAN Controller |
| Processor Architecture | AVR Enhanced RISC |
| 数据总线宽度 | 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 |
| 封装 | 64-QFN (9 x 9 mm) |
| 安装类型 | Surface Mount |
| 生命周期状态 | Active |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
| Conflict-Free DRC Status | Conflict Free |
AT90CAN32-16MU 64-qfn (9 x 9 mm) 引脚配置指南
AT90CAN32-16MU（64-qfn (9 x 9 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： AT90CAN32-16MU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AT90CAN32-16MU 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： AT90CAN32-16MU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated CAN controller in a compact QFN package （对比 ATMEGA325PA-MU)
- Same-family replacement with identical core resource ratings （对比 AT90CAN32-16MUR)
- Five-volt integration with multiple serial peripherals （对比 AT90CAN32-16AU)
设计说明
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.
合规信息
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.
