ATMEGA32-16AQ - 8-bit AVR MCU 16MHz 32KB Flash TQFP-44 | Microchip
料号： ATMEGA32-16AQ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA32-16AQ 概述
An 8-bit AVR microcontroller is a single-chip processor that integrates a RISC CPU, program memory, data memory, and peripherals such as timers, UART, SPI, and I2C on one die. AVR MCUs sit within the broader hierarchy of embedded processors: microcontroller -> 8-bit MCU family -> AVR ATmega series, positioned for cost-sensitive embedded control where simplicity, 5V tolerance, and single-cycle instruction execution matter more than raw compute throughput.
Key features include the advanced RISC architecture with 131 powerful instructions, most executing in a single clock cycle, plus 32 general-purpose working registers directly connected to the ALU. The ATMEGA32-16AQ also integrates a JTAG interface for on-chip debugging and boundary-scan, read-while-write FLASH for in-system self-programming, brown-out detection, power-on reset, watchdog timer, PWM outputs, and I2C, SPI, and UART/USART connectivity.
Technically, the Harvard architecture separates program and data buses, allowing instruction fetch and data access to occur simultaneously; this is what enables the 16 MIPS at 16 MHz figure. The 'A' grade suffix in the ordering code denotes the extended (automotive-adjacent) temperature range option, and the part is RoHS-green packaged. Two 8-bit and one 16-bit timer with compare modes support PWM motor control and precise waveform generation.
Typical applications include industrial control panels, sensor acquisition systems using the 8-channel 10-bit ADC, and legacy embedded designs maintained for long-term production.
Design consideration: this part operates at 4.5V to 5.5V for full 16 MHz speed; verify your supply rail before substituting newer 1.8V-5.5V AVR parts.
This page adds distributor-sourced availability data, drop-in alternative analysis, and engineering design guidance not found in the manufacturer datasheet alone.
直接替换替代料： ATMEGA32-16AQ ——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： ATMEGA32-16AQ （相同外形与封装尺寸） ——差异在于 Package, EEPROM, SRAM, Core Architecture, Debug Interface.
快速对比工具——选择替代料号进行并排对比：
ATMEGA32-16AC
✅ 直接替换✓ 有现货
$4.48 / 个
查看数据手册 →ATMEGA32A-AU
✅ 直接替换✓ 有现货
$2.95 / 个
查看数据手册 →ATMEGA16A-AU
✅ 直接替换✓ 有现货
$2.05 / 个
查看数据手册 →ATMEGA8535-16AU
✅ 直接替换✓ 有现货
$4.41 / 个
查看数据手册 →ATMEGA8535L-8MU
✅ 直接替换✓ 有现货
$3.95 / 个
查看数据手册 →ATMEGA32-16AQ 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Flash Memory | 32KB (16K x 16) |
| SRAM | 2KB |
| EEPROM | 1KB (1K x 8) |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| ADC | 8-channel, 10-bit |
| Debug Interface | JTAG for on-chip-debug and boundary-scan |
| Throughput | Up to 16 MIPS at 16 MHz |
| Instruction Set | 131 instructions, most single-cycle |
| 工作温度 | Extended temperature range (A grade) |
| 封装 | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Green (RoHS compliant) |
ATMEGA32-16AQ 44-tqfp (10x10 mm) 引脚配置指南
ATMEGA32-16AQ（44-tqfp (10x10 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： ATMEGA32-16AQ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA32-16AQ 适用于 6 应用s: Industrial Control Panels, Analog Sensor Acquisition Systems, Legacy Embedded Product Maintenance, Motor Control and PWM Drive, Educational and Prototyping Platforms, Embedded Communication Nodes.
Industrial Control Panels
The ATMEGA32-16AQ fits industrial control panels because its extended temperature (A-grade) rating, brown-out detection, watchdog timer, and power-on reset provide the fault-tolerance that factory-floor environments demand. The 8-bit AVR core executes 131 instructions mostly in single cycles, giving deterministic 16 MIPS behavior for sequential control logic, relay sequencing, and operator-interface scanning. Its I2C and SPI buses connect RTCs, displays, and expansion I/O expanders, while the UART/USART links to Modbus-style RS-485 converters. The 32KB self-programming FLASH supports field firmware updates over the serial link without removing the device from the panel, reducing maintenance downtime in installed equipment.
推荐
Analog Sensor Acquisition Systems
With an integrated 8-channel 10-bit ADC, the ATMEGA32-16AQ serves multi-sensor acquisition nodes without an external converter, saving board area and BOM cost in temperature, pressure, and level monitoring products. The AVR's Harvard architecture sustains 16 MIPS at 16 MHz, enough to oversample each channel and apply digital filtering in firmware for effective resolution beyond the nominal 10 bits. The 1KB EEPROM retains calibration constants across power cycles, and the internal 2.56V-class reference options (per family datasheet) simplify front-end design. UART output streams readings to a host or logger, while the watchdog timer guarantees recovery from sensor-line transients common in electrically noisy plant environments.
推荐
Legacy Embedded Product Maintenance
Many products designed on the original ATmega32 remain in production, and the ATMEGA32-16AQ is a primary service stock item for maintaining them. Because Microchip's datasheet flags the ATMEGA32A as the newer device, procurement teams can dual-source between the AQ variant and ATMEGA32A-AU with zero PCB or firmware changes, since the 44-TQFP footprint and pinout are identical. Keeping the extended-temperature AQ grade in stock also covers field units installed in outdoor or unconditioned enclosures. Firmware compiled years ago for IAR, AVR-GCC, or Atmel Studio links unchanged, and JTAG on-chip debugging remains available for diagnosing field-reported defects without redesign.
推荐
Motor Control and PWM Drive
The ATMEGA32-16AQ generates up to four PWM channels from two 8-bit timers and one 16-bit timer with output-compare units, making it suitable for DC motor speed control, servo driving, and LED dimming in industrial equipment. The 16-bit timer's input-capture pin supports encoder or tachometer feedback measurement with hardware timestamping, offloading the CPU. Running at 16 MHz, PWM resolution reaches 8-bit at roughly 62.5 kHz carrier, adequate for quiet motor drive. Brown-out detection prevents corrupting PWM duty state during supply dips, and the 5V-tolerant AVR I/O drives MOSFET gate drivers directly, simplifying the power stage interface for small motor applications.
推荐
Educational and Prototyping Platforms
The ATmega32 family, including the ATMEGA32-16AQ in 44-TQFP, is widely used in university embedded-systems courses and hobbyist platforms; community support such as the MightyCore Arduino core covers ATmega32 directly. The single-cycle RISC core with 32 general-purpose registers makes assembly-level teaching straightforward, while C development with AVR-GCC is fully supported. SPI, UART, and JTAG headers expose every major serial protocol on a breadboard-friendly dev board. For prototype builds where hand soldering matters, the DIP-40 ATMEGA32-16PU sibling offers the same silicon in a through-hole package, letting teams prototype on DIP and migrate to the identical-pinout TQFP for production boards.
推荐
Embedded Communication Nodes
The ATMEGA32-16AQ integrates hardware I2C (TWI), SPI, and UART/USART, enabling compact protocol-bridge nodes that translate between field buses and local devices. Typical roles include RS-485 gateways to sensor clusters, SPI-to-UART converters for display modules, and I2C masters managing RTCs and EEPROMs. The 2KB SRAM buffers message frames comfortably for small protocol stacks, and the self-programming 32KB FLASH allows parameter tables or even firmware to be updated in the field. The JTAG boundary-scan capability assists production test of the assembled node, verifying board interconnects before functional firmware is loaded, which shortens manufacturing test development for small-batch industrial communication hardware.
推荐
推荐产品汇总
工程参考数据： ATMEGA32-16AQ ——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 | ATMEGA32-16AC | ATMEGA32A-AU | ATMEGA16A-AU | ATMEGA8535-16AU | ATMEGA8535L-8MU |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Speed | AVR 8-bit, 16 MHz | AVR 8-bit, 16 MHz | AVR 8-bit, 16 MHz | AVR 8-bit, 16 MHz | AVR 8-bit, 16 MHz | AVR 8-bit, 8 MHz |
| Flash Memory | 32KB | 32KB | 32KB | 16KB | 8KB | 8KB |
| SRAM | 2KB | 2KB | 2KB | 1KB | 512B | 512B |
| EEPROM | 1KB | 1KB | 1KB | 512B | 512B | 512B |
| Temperature Grade | Extended (A grade) | Commercial (C grade) | Standard | Standard | Standard | Extended (I suffix variants exist) |
| Recommended For | Extended-temp industrial and legacy maintenance | Commercial-temp same-function builds | New designs (Microchip-recommended refresh) | Cost-reduced fits within 16KB code | Existing ATmega8535 firmware bases | Low-voltage 8 MHz designs |
关键差异点
- Extended temperature A-grade rating in a fully populated family （对比 ATMEGA32-16AC)
- Maximum 32KB FLASH within the same footprint （对比 ATMEGA16A-AU)
- Twice the clock of the low-voltage family member （对比 ATMEGA8535L-8MU)
- Legacy silicon availability for existing designs （对比 ATMEGA32A-AU)
设计说明
Do not assume the newer ATMEGA32A is temperature-grade-identical. The -AQ suffix denotes the extended-temperature A-grade option; the ATMEGA32A-AU standard part may not carry the same rating. When substituting for fielded outdoor or industrial units, verify the temperature grade on the replacement's ordering code and Microchip qualification data before release, or requalify the enclosure thermal environment against the standard-grade limits.
The 44-TQFP (10x10 mm) land pattern requires a 0.5 mm pitch footprint; verify your CAD library against the manufacturer package drawing before assembly. Place 100 nF ceramic decoupling capacitors directly at the VCC/GND pairs and a separate decoupler at the analog supply pin, with the ADC ground reference kept as a quiet island. The JTAG pins share port C, so include JTAG header footprints (even if unpopulated) for production debugging and boundary-scan test.
Enable brown-out detection via fuses so that FLASH and EEPROM writes are inhibited during supply droop; corrupted EEPROM calibration data is the most common field failure on AVR designs without BOD. Configure the fuse for a brown-out threshold appropriate to your 5V rail, and add bulk capacitance near the regulator so the BOD has time to reset the core cleanly during brownout events rather than allowing partial write cycles to the 1KB EEPROM.
At 16 MHz and 5V, the ATmega32 consumes only a few tens of milliwatts, so the 10x10 mm TQFP needs no heatsink; a standard SMD footprint on 1 oz copper is sufficient. Thermal design effort should instead target the surrounding power components (regulators, drivers). Estimated: even at full I/O sink current of 20 mA per pin on several ports, junction rise stays well within the TQFP package capability at industrial ambient temperatures.
合规信息
Distributor listings (FindIC) describe the part as 'Green' packaged, indicating RoHS compliance and lead-free finish. Formal REACH and conflict-minerals declarations should be requested from Microchip.