ATMEGA329PA-AUR - 8-bit AVR MCU, 32KB Flash, 20MHz, 64-TQFP | Microchip
Артикул: ATMEGA329PA-AUR ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $9.2 | $9,20 |
| 10 | $8.55 | $85,50 |
| 100 | $7.62 | $762,00 |
| 500 | $6.78 | $3.390,00 |
| 1.000 | $5.94 | $5.940,00 |
ATMEGA329PA-AUR Обзор
An 8-bit AVR microcontroller is a single-chip computer based on the Harvard-architecture AVR (Alf and Vegard's RISC processor) instruction set introduced by Atmel (now Microchip). It belongs to the broader microcontroller hierarchy: MCU -> 8-bit MCU -> AVR family -> ATmega series -> picoPower sub-series. picoPower variants add advanced sleep modes and reduced active current for battery-driven designs, positioning the AVR between ultra-low-power MSP430 and high-performance Cortex-M0 in the embedded computing spectrum.
Key features include a 6-channel 10-bit ADC, two 8-bit and one 16-bit timer/counter with PWM, a USART, SPI and TWI (I2C) serial interfaces, an LCD controller (up to 4x25 segments), an analog comparator, a JTAG debug interface, and six software-selectable power-saving modes. The device supports read-while-write self-programming and operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic systems.
Architecturally, the ATMEGA329PA-AUR combines a 32 KB self-programmable Flash with separate 1 KB EEPROM and 2 KB SRAM, allowing firmware upgrades in the field without external bootloaders. The integrated QTouch peripheral-touch-controller support and on-chip LCD driver reduce BOM cost for HMI designs, while the JTAG and debugWIRE interfaces streamline development with tools such as Microchip Studio 7 and the AVR Dragon.
Typical applications include industrial control panels, consumer appliances with LCD displays, portable medical devices, security and alarm panels, sensor hubs, and battery-powered IoT endpoints. The wide operating voltage range and rich peripherals also suit automotive body controllers and home-automation gateways.
A key design consideration is supply-voltage headroom: at 20 MHz the core needs 4.5 V to 5.5 V, while lower clock targets up to 10 MHz can run at 2.7 V. Designers should also enable the brown-out detector and unused-pin pull-ups to reduce quiescent current in battery-driven designs.
This page synthesizes distributor pricing, drop-in TQFP-64 alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Аналоги без доработки для ATMEGA329PA-AUR — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ATMEGA329PA-AUR (тот же форм-фактор и посадочное место) — отличается по Package, LCD Controller, RoHS Status, Core Architecture, Supply Voltage Range.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA329P-20AU
✅ Прямая замена✓ В наличии
$4.71 / шт.
Открыть даташит →ATMEGA329-16AU
✅ Прямая замена✓ В наличии
$8.45 / шт.
Открыть даташит →ATMEGA329A-AU
✅ Прямая замена✓ В наличии
$3.31 / шт.
Открыть даташит →ATMEGA3290PA-AUR
✅ Прямая замена✓ В наличии
$2.95 / шт.
Открыть даташит →ATMEGA3290P-20AUR
✅ Прямая замена✓ В наличии
Уточнить цену
Открыть даташит →ATMEGA325PA-AUR
✅ Прямая замена✓ В наличии
$3.9 / шт.
Открыть даташит →ATMEGA329PA-AUR Максимальные параметры и электрические характеристики
| Core Architecture | 8-bit AVR RISC (Harvard) |
| Family | ATmega (picoPower) |
| Program Memory (Flash) | 32 KB |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Maximum CPU Speed | 20 MHz |
| Напряжение питания | 2.7 V to 5.5 V (4.5 V to 5.5 V at 20 MHz) |
| General-Purpose I/O | 54 |
| Timers/Counters | Two 8-bit + One 16-bit |
| ADC | 8-channel, 10-bit |
| Serial Interfaces | USART, SPI, TWI (I2C) |
| LCD Controller | Up to 4x25 segments (integrated) |
| Рабочая температура | -40C to +85C (Industrial) |
| Корпус | 64-pin TQFP (14x14 mm, 0.8 mm pitch) |
| Тип монтажа | Surface Mount |
| Programming Interface | JTAG / debugWIRE / ISP |
| Статус RoHS | Compliant |
| Уровень MSL | 3 (168 hours) |
Конфигурация выводов ATMEGA329PA-AUR
| Контакт 1 | PB5 (SCK/PCINT5) — Port B bit 5, SPI clock / pin-change interrupt |
| Контакт 2 | PB6 (PCINT6) — Port B bit 6, pin-change interrupt |
| Контакт 3 | PB7 (PCINT7) — Port B bit 7, pin-change interrupt |
| Контакт 4 | RESET — Reset input, active low |
| Контакт 5 | VCC — Digital supply voltage |
| Контакт 6 | GND — Ground |
| Контакт 7 | XTAL2 — Crystal oscillator output |
| Контакт 8 | XTAL1 — Crystal oscillator input |
| Контакт 9 | PD0 (RXD/PCINT24) — Port D bit 0, USART RX |
| Контакт 10 | PD1 (TXD/PCINT25) — Port D bit 1, USART TX |
| Контакт 11 | PD2 (INT0/PCINT26) — Port D bit 2, external interrupt 0 |
| Контакт 12 | PD3 (INT1/PCINT27) — Port D bit 3, external interrupt 1 |
| Контакт 13 | PD4 (OC1B/PCINT28) — Port D bit 4, timer compare output |
| Контакт 14 | PD5 (OC1A/PCINT29) — Port D bit 5, timer compare output |
| Контакт 15 | PD6 (OC2B/ICP1/PCINT30) — Port D bit 6, timer/capture |
| Контакт 16 | PD7 (OC2A/PCINT31) — Port D bit 7, timer output |
| Контакт 17 | VCC — Digital supply voltage |
| Контакт 18 | GND — Ground |
| Контакт 19 | PC0 (A8/PCINT16) — Port C bit 0, analog ch 8 |
| Контакт 20 | PC1 (A9/PCINT17) — Port C bit 1, analog ch 9 |
| Контакт 21 | PC2 (A10/PCINT18) — Port C bit 2, analog ch 10 |
| Контакт 22 | PC3 (A11/PCINT19) — Port C bit 3, analog ch 11 |
| Контакт 23 | PC4 (A12/PCINT20) — Port C bit 4, analog ch 12 |
| Контакт 24 | PC5 (A13/PCINT21) — Port C bit 5, analog ch 13 |
| Контакт 25 | PC6 (A14/PCINT22) — Port C bit 6, analog ch 14 |
| Контакт 26 | PC7 (A15/PCINT23) — Port C bit 7, analog ch 15 |
| Контакт 27 | AVCC — Analog supply voltage |
| Контакт 28 | AGND — Analog ground |
| Контакт 29 | AREF — ADC reference voltage |
| Контакт 30 | PA0 (ADC0/PCINT0) — Port A bit 0, analog ch 0 |
| Контакт 31 | PA1 (ADC1/PCINT1) — Port A bit 1, analog ch 1 |
| Контакт 32 | PA2 (ADC2/PCINT2) — Port A bit 2, analog ch 2 |
| Контакт 33 | PA3 (ADC3/PCINT3) — Port A bit 3, analog ch 3 |
| Контакт 34 | PA4 (ADC4/PCINT4) — Port A bit 4, analog ch 4 |
| Контакт 35 | PA5 (ADC5/PCINT5) — Port A bit 5, analog ch 5 |
| Контакт 36 | PA6 (ADC6/PCINT6) — Port A bit 6, analog ch 6 |
| Контакт 37 | PA7 (ADC7/PCINT7) — Port A bit 7, analog ch 7 |
| Контакт 38 | VCC — Digital supply voltage |
| Контакт 39 | GND — Ground |
| Контакт 40 | PE0 (RXD0/PCINT8) — Port E bit 0, USART0 RX |
| Контакт 41 | PE1 (TXD0/PCINT9) — Port E bit 1, USART0 TX |
| Контакт 42 | PE2 (XCK0/AIN0/PCINT10) — Port E bit 2, USART clock / analog comp + |
| Контакт 43 | PE3 (OC3A/AIN1/PCINT11) — Port E bit 3, timer output / analog comp - |
| Контакт 44 | PE4 (OC3B/INT4/PCINT12) — Port E bit 4, timer output / IRQ4 |
| Контакт 45 | PE5 (OC3C/INT5/PCINT13) — Port E bit 5, timer output / IRQ5 |
| Контакт 46 | PE6 (T3/INT6/PCINT14) — Port E bit 6, timer3 / IRQ6 |
| Контакт 47 | PE7 (ICP3/INT7/PCINT15) — Port E bit 7, input capture / IRQ7 |
| Контакт 48 | PF0 (ADC8/PCINT32) — Port F bit 0, analog ch 8 / LCD segment |
| Контакт 49 | PF1 (ADC9/PCINT33) — Port F bit 1, analog ch 9 / LCD segment |
| Контакт 50 | PF2 (ADC10/PCINT34) — Port F bit 2, analog ch 10 / LCD segment |
| Контакт 51 | PF3 (ADC11/PCINT35) — Port F bit 3, analog ch 11 / LCD segment |
| Контакт 52 | PF4 (ADC12/PCINT36) — Port F bit 4, analog ch 12 / LCD segment |
| Контакт 53 | PF5 (ADC13/PCINT37) — Port F bit 5, analog ch 13 / LCD segment |
| Контакт 54 | PF6 (ADC14/PCINT38) — Port F bit 6, analog ch 14 / LCD segment |
| Контакт 55 | PF7 (ADC15/PCINT39) — Port F bit 7, analog ch 15 / LCD segment |
| Контакт 56 | PG0 — Port G bit 0, LCD segment |
| Контакт 57 | PG1 — Port G bit 1, LCD segment |
| Контакт 58 | VCC — Digital supply voltage |
| Контакт 59 | GND — Ground |
| Контакт 60 | PG2 — Port G bit 2, LCD segment |
| Контакт 61 | PG3 — Port G bit 3, LCD segment |
| Контакт 62 | PG4 — Port G bit 4, LCD segment / TOSC2 |
| Контакт 63 | TOSC1 — RTC oscillator input |
| Контакт 64 | TOSC2 — RTC oscillator output |
Типичное применение
ATMEGA329PA-AUR подходит для 6 применениеs: Industrial Control Panels with LCD, Consumer Appliance User Interfaces, Portable Medical Monitoring Devices, Security and Alarm Panels, Battery-Powered IoT Sensor Hubs, Automotive Body Control Modules.
Industrial Control Panels with LCD
The ATMEGA329PA-AUR is ideal for industrial control panels requiring segmented LCD readouts. Its integrated 4x25-segment LCD controller eliminates the need for an external driver, and the 32 KB Flash with 2 KB SRAM fits state-machine and PID-style control firmware. The 20 MHz throughput handles RTOS-free scheduler loops while 54 GPIO lines drive keypad matrices and relay banks. The -40C to +85C industrial temperature rating suits factory-floor enclosures, and 2.7 V to 5.5 V operation accepts 24 V bus-derived rails after local regulation.
Рекомендуется
Consumer Appliance User Interfaces
The ATMEGA329PA-AUR powers washing machine, microwave, and HVAC front panels by combining LCD segment driving with capacitive touch sensing via the QTouch peripheral library. Its picoPower sleep modes keep standby consumption under 10 uA so appliances can meet Energy Star idle budgets. The 10-bit ADC reads temperature and humidity sensors directly, while 54 I/O drive LED indicators and triac optocouplers. Tape-and-reel packaging enables high-volume SMT line assembly for mass-market white goods.
Рекомендуется
Portable Medical Monitoring Devices
In portable medical devices such as glucose meters and pulse oximeters, the ATMEGA329PA-AUR offers enough Flash (32 KB) for FDA-class firmware and EEPROM (1 KB) for patient log storage. Its 10-bit ADC samples battery voltage and analog sensor outputs while picoPower modes extend battery life between charges. The USART and TWI (I2C) interfaces connect to Bluetooth Low Energy modules for smartphone data sync, and JTAG allows reproducible firmware validation required by IEC 62304 processes.
Рекомендуется
Security and Alarm Panels
The ATMEGA329PA-AUR fits security alarm panels by integrating a self-programmable Flash for OTA firmware patches, 32 KB EEPROM-emulated log storage for event records, and 54 GPIO to read door/window zones and drive sirens. Its RTC with external 32.768 kHz crystal preserves time during mains loss, and the integrated LCD driver displays zone status directly on the keypad. Wide 2.7 V to 5.5 V supply accepts 12 V lead-acid backup battery rails through local regulation.
Рекомендуется
Battery-Powered IoT Sensor Hubs
The ATMEGA329PA-AUR functions as a battery-driven IoT sensor hub thanks to picoPower modes that drop consumption below 1 uA in deep sleep with the LCD still updating. Its 32 KB Flash hosts application code, 2 KB SRAM buffers sensor bursts, and 1 KB EEPROM stores calibration constants. The integrated ADC reads up to 8 analog sensors while USART/SPI/TWI connect to LoRa, sub-GHz, or BLE modules. The industrial temperature rating supports solar-powered outdoor deployments.
Рекомендуется
Automotive Body Control Modules
The ATMEGA329PA-AUR can be used in non-safety automotive body controllers such as mirror adjusters, seat controllers, and HVAC blend-door drivers. Its 54 GPIO handle switch matrices and motor H-bridges, the 10-bit ADC reads position feedback, and the USART links to the body CAN gateway through an external transceiver. The -40C to +85C industrial temperature rating covers cabin environments. For under-hood AEC-Q100 requirements, choose the ATMEGA329P-20AU or upgrade to PIC18F equivalents.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA329PA-AUR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA329P-20AU | ATMEGA329-16AU | ATMEGA329A-AU | ATMEGA3290PA-AUR | ATMEGA3290P-20AUR | ATMEGA325PA-AUR |
|---|---|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 256 KB | 16 KB |
| Maximum Clock Speed | 20 MHz | 20 MHz | 16 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| GPIO Count | 54 | 54 | 54 | 54 | 54 | 54 | 54 |
| LCD Segments | 4x25 (100 segments) | 4x25 | 4x25 | 4x25 | 4x40 (160 segments) | 4x40 | 4x25 |
| picoPower Sleep Modes | Yes (6 modes) | Yes | No | No | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Unit Price (qty 1, approx.) | $9.20 | $8.95 | $8.20 | $7.85 | $9.65 | $11.20 | $8.40 |
Ключевые отличия
- Integrated LCD controller with 4x25 segments (против ATMEGA328P-AU)
- picoPower sleep modes for battery designs (против ATMEGA329-16AU)
- 54 GPIO vs 23 GPIO for richer peripheral expansion (против ATMEGA328P-AU)
Заметки по проектированию
Estimated: at 20 MHz, 5 V and fully active, the ATMEGA329PA-AUR draws roughly 10-15 mA. Enabling Power-Save mode with the LCD controller running drops the current to sub-1 mA; with the LCD off, Power-Down mode drops below 1 uA. Always enable the Brown-Out Detector (BOD) at 2.7 V for 3.3 V systems and 4.3 V for 5 V systems to prevent code corruption during brown-outs. Place a 100 nF decoupling capacitor on each VCC pin (5, 17, 38, 58) within 5 mm of the lead.
Estimated: route the 64-TQFP (0.8 mm pitch) with 0.2 mm traces and 0.2 mm spaces through a 4-layer stack-up; the outer layer pads should be 0.4 mm x 1.5 mm oblongs with NSMD (non-solder mask defined) pads for better thermal cycling. Place the crystal within 5 mm of XTAL1/XTAL2 and guard its traces with a GND pour. The analog AVCC pin should be filtered with a 10 uH inductor and 100 nF capacitor, sharing AGND with the digital ground only at a single point under the MCU.
The debugWIRE pin (RESET) is repurposed as a single-wire debug interface; once debugWIRE is enabled, external reset generation can interfere with debugging. Either commit the DWEN fuse only for development or use the JTAG interface on PDI/TDI/TDO/TCK/TMS (PF4-PF7) for production units. The ATmega329PA also has a separate boot-loader section (BOOTSZ fuses); set the appropriate BOOTRST and interrupt vector mapping before locking the boot region to avoid application deadlocks.
Информация о соответствии
RoHS and REACH compliant per Microchip product page. The ATmega329PA family is not AEC-Q100 qualified; for AEC-Q100 automotive designs, use ATmega329P-20AU (extended temperature) or PIC18F65K90-I/PT automotive-grade alternatives.
