ATMEGA324P-15AT - 8-bit AVR MCU, 32KB Flash 44-TQFP | Microchip
料号： ATMEGA324P-15AT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.02 | $6.02 |
| 10 | $5.42 | $54.20 |
| 100 | $4.88 | $488.00 |
| 500 | $4.39 | $2,195.00 |
| 1,000 | $3.95 | $3,950.00 |
ATMEGA324P-15AT 概述
An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC core, which belongs to the broader hierarchy of embedded processors: MCU -> microcontroller -> integrated circuit -> semiconductor. The AVR architecture loads one instruction per clock cycle through a single-stage pipeline, and combines a Harvard bus structure with 32 general-purpose working registers directly connected to the arithmetic logic unit, allowing most instructions to execute in a single cycle.
Key features of the ATMEGA324P-15AT include read-while-write ISP Flash for self-programming, the picoPower technology set for low standby consumption, two 8-bit timers, one 16-bit timer, a 10-bit ADC with up to 8 single-ended channels, an analog comparator, USART, SPI and two-wire (I2C-compatible) TWI serial interfaces, plus a JTAG interface for boundary scan and on-chip debugging.
Technically, the picoPower platform combines a low-leakage process with software-selectable sleep modes, including power-save and standby modes with a running 32.768 kHz crystal timer, enabling battery-backed automotive modules to hold real-time functions in the microampere range. The P suffix denotes the picoPower die generation of the ATmega324 family, and the 15 speed grade supports full function at 16 MHz across the supply window per the speed-versus-voltage curve of the AVR ATmega series.
Typical applications include automotive body and comfort control nodes, industrial sensor and actuator controllers, motor control panels, HVAC systems, and battery-powered instrumentation where AEC-Q100 qualification and mature tooling matter.
Design consideration: respect the AVR clock-versus-VCC safe operating region - at 16 MHz the device must be operated in the upper supply range, so avoid undervoltage brownout conditions by enabling the internal brown-out detector.
This page synthesizes distributor pricing, drop-in alternatives within the AVR ATmega family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA324P-15AT ——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： ATMEGA324P-15AT （相同外形与封装尺寸） ——差异在于 Package, EEPROM, SRAM, Supply Voltage Range, Instructions.
快速对比工具——选择替代料号进行并排对比：
ATMEGA324PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.87 / 个
查看数据手册 →ATMEGA324A-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.09 / 个
查看数据手册 →ATMEGA324P-15AZ
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA32-16AUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.41 / 个
查看数据手册 →ATMEGA164PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.75 / 个
查看数据手册 →ATMEGA644PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.61 / 个
查看数据手册 →ATMEGA16A-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.05 / 个
查看数据手册 →ATMEGA324P-15AT 最大额定值与电气特性
| Core | 8-bit AVR RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| 最大时钟频率 | 16 MHz |
| I/O Lines | 32 |
| ADC Resolution | 10-bit |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C-compatible) |
| Debug / Programming | JTAG, ISP (In-Circuit Serial Programming) |
| Technology | picoPower |
| Qualification | AEC-Q100 qualified |
| 封装 | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (A grade) |
| Series | AVR ATmega |
| RoHS 状态 | Compliant |
ATMEGA324P-15AT 44-tqfp (10x10 mm) 引脚配置指南
ATMEGA324P-15AT（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： ATMEGA324P-15AT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA324P-15AT 适用于 6 应用s: Automotive Body Control Modules, Industrial Sensor and Actuator Controllers, HVAC and Building Automation, Battery-Powered Portable Instrumentation, Motor Control and LED Lighting Panels, Communication Gateways and Industrial Nodes.
Automotive Body Control Modules
The ATMEGA324P-15AT fits automotive body and comfort control nodes directly because it carries AEC-Q100 qualification, 32 KB of self-programmable Flash for firmware updates in the field, and 32 I/O lines for driving relays, lamps, and switches. The picoPower die keeps module standby current low while a 32.768 kHz crystal runs the power-save real-time timer, so wake-on-event behavior such as door or key detection is practical. Designers typically wire the 10-bit ADC to analog sensor inputs, TWI to an EEPROM or front panel, and USART to LIN-style transceivers; the brown-out detector must be enabled to guarantee safe Flash writes during crank transients.
推荐
Industrial Sensor and Actuator Controllers
In industrial control panels, the ATMEGA324P-15AT provides a 16 MHz, 32-IO core that reads 10-bit ADC channels from thermistors and pressure bridges while toggling PWM outputs for heaters, valves, and small motors. The -40C to +85C A grade temperature range and AEC-Q100 qualification give margin in harsh cabinets, and the 1 KB EEPROM stores calibration constants that survive power cycles. SPI connects isolated ADCs or display drivers, TWI handles front-panel expanders, and the USART links to Modbus RTU converters. Its single-cycle RISC core executes control loops with predictable timing, and JTAG boundary scan aids production test of densely populated boards.
推荐
HVAC and Building Automation
Thermostats, fan coils, and zone controllers benefit from the ATMEGA324P-15AT's combination of a low-power picoPower die and rich peripherals: the 10-bit ADC samples NTC temperature sensors, the 16-bit timer generates triac or PWM heater control, and the two-wire TWI interface talks to humidity sensors and room displays. Sleep modes with the asynchronous RTC timer allow battery-backed wall units to idle at microampere-level current between measurements. The 32 KB Flash accommodates control firmware plus a small UI stack, and the 44-TQFP footprint with 32 I/O directly drives LCD backplanes, relays, and stepper dampers without external glue logic in typical designs.
推荐
Battery-Powered Portable Instrumentation
Handheld meters, data loggers, and portable test instruments exploit the ATMEGA324P-15AT's power-save and standby modes with a running 32.768 kHz timer, letting the MCU sleep between periodic ADC conversions of the 10-bit converter. Two KB of SRAM buffers measurement sequences, and the 1 KB EEPROM keeps calibration tables and event counters in non-volatile storage. The 16 MHz rating supports fast bursts of computation for DSP-style filtering when awake, then quick re-entry to sleep. Designers place the picoPower device between a boost converter and a segment or small graphic LCD, driving it with SPI, and use the USART for PC or wireless module updates.
推荐
Motor Control and LED Lighting Panels
The ATMEGA324P-15AT drives small DC and stepper motors and multi-channel LED strings using its 16-bit timer for high-resolution PWM and 8-bit timers for complementary channels, while the analog comparator plus ADC supports current-limit protection loops. Its 32 I/O lines handle limit switches, encoders, keypad matrices, and status indicators without extra port expanders. The -40C to +85C operating range and AEC-Q100 qualification also make it suitable for automotive lighting modules. Because the RISC core executes one instruction per clock at 16 MHz, PI current loops and commutation tables run deterministically; the brown-out detector should be enabled so PWM outputs do not glitch during supply dips.
推荐
Communication Gateways and Industrial Nodes
As a protocol gateway, the ATMEGA324P-15AT runs USART, SPI, and TWI simultaneously, bridging, for example, a Modbus RTU USART link to TWI sensor buses and SPI peripherals in one 44-TQFP device. The 32 KB ISP Flash with read-while-write allows the application to update parameter blocks in Flash without halting communication, and JTAG supports boundary-scan production test plus source-level debugging through MPLAB SNAP. Four I/O ports provide chip-selects, flow control, and status handshakes for external transceivers. The 16 MHz single-cycle core sustains typical industrial baud rates with interrupt headroom, while picoPower sleep modes reduce idle consumption between poll cycles.
推荐
推荐产品汇总
工程参考数据： ATMEGA324P-15AT ——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 | ATMEGA324PA-AU | ATMEGA324A-AU | ATMEGA32-16AUR | ATMEGA644PA-AU | |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP - same footprint | 44-TQFP (10x10) - same | |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB | 1 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | |
| JTAG Boundary Scan | Yes | Yes | Yes | No | Yes | |
| Power Technology | picoPower (P die) | picoPower (lower current) | non-picoPower | legacy ATmega32 | picoPower |
关键差异点
- JTAG on-chip debug and boundary scan （对比 ATMEGA32-16AUR)
- Drop-in upgrade to double the memory （对比 ATMEGA644PA-AU)
- picoPower die over earlier 324A （对比 ATMEGA324A-AU)
设计说明
Respect the AVR speed-versus-voltage safe operating region: the 15 speed grade is rated for 16 MHz, but 16 MHz operation is only valid in the upper supply range shown in the datasheet clock curve. Enable the internal brown-out detector (BODLEVEL fuse) so the core never executes Flash writes or EEPROM writes below the valid VCC threshold - corrupted EEPROM after a brown-out is the most common field failure on ATmega designs.
Decouple VCC and AVCC independently with 100 nF ceramic capacitors placed within 5 mm of the respective TQFP pins, plus one bulk 10 uF per supply rail. Tie AVCC to VCC through an LC filter when the 10-bit ADC is used with a noisy digital rail; do not leave AVCC unconnected even if the ADC is unused. Keep the AREF pin clean: place 100 nF from AREF to GND and never drive it externally while the internal reference is selected.
The JTAG interface shares pins PC2-PC5 (TCK/TMS/TDO/TDI) with port C I/O. If your board does not use JTAG, disable it with the JTAGEN fuse to free four I/O lines - JTAG is enabled by default on this family, and PC2-PC5 will not toggle as expected otherwise. Also note RESET is shared with pin PC6 only on smaller packages; on the 44-TQFP it is a dedicated pin, so keep a 10 kOhm pull-up and header for field ISP updates.
Route the crystal (XTAL1/XTAL2) with short, direct traces and guard both pins with a ground ring; keep the 32.768 kHz RTC crystal (if used in power-save mode) away from fast PWM and SPI lines to avoid capturing noise into the asynchronous timer. For the TQFP-44, use thermal reliefs on the four ground vias near pin 9/36 to aid rework without compromising return paths.
合规信息
AEC-Q100 qualification confirmed by Microchip USA listing; RoHS compliance indicated by distributor listings. REACH, lead-free and halogen-free status not explicitly stated in provided data.