ATMEGA324P-15AT1 - 8-Bit AVR MCU 16MHz 32KB Flash | Microchip
N.º da peça: ATMEGA324P-15AT1 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.01 | $6,01 |
| 10 | $5.55 | $55,50 |
| 100 | $4.95 | $495,00 |
| 500 | $4.55 | $2.275,00 |
| 1.000 | $4.21 | $4.210,00 |
ATMEGA324P-15AT1 Visão geral
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, sitting within the broader hierarchy of embedded processors: MCU -> AVR ATmega family -> microcontroller unit (MCU) -> semiconductor integrated circuit. AVRs integrate program Flash, data SRAM, EEPROM, timers, UART/SPI/TWI serial interfaces and a 10-bit ADC on a single die, replacing multi-chip solutions in cost- and power-sensitive embedded control designs.
Key features include the picoPower low-power technology with idle, power-down and power-save sleep modes, read-while-write Flash for in-system self-programming, and a rich peripheral set: two 8-bit timers, one 16-bit timer, real-time counter, 8-channel 10-bit ADC, USART, SPI and two-wire (I2C) interfaces, and an on-chip debug capability via debugWIRE-style ICSP using just two I/O pins plus reset.
The AVR core pairs 32 general purpose working registers directly with the ALU, eliminating the accumulator bottleneck of older 8051-class architectures. In-system programmable (ISP) Flash supports firmware updates in the field through SPI, while boot-section self-programming enables bootloader-based updates over UART.
Typical applications include automotive body and comfort modules (leveraging its AEC-Q100 qualification), industrial sensors and actuators, and consumer appliance control boards where 5V-tolerant I/O and wide 2.7V to 5.5V supply operation simplify system design.
When designing with this device, budget the maximum 16 MHz clock against your 5.5V worst-case supply, and reserve the PC2-PC7 pins carefully since they double as JTAG/oscillator functions; configure fuses deliberately because an incorrect clock fuse selection can lock out ICSP access.
This page synthesizes distributor pricing (LCSC, DigiKey, Octopart), same-footprint drop-in alternatives within the AVR family, and practical design notes not consolidated in the manufacturer datasheet.
Alternativas drop-in para ATMEGA324P-15AT1 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA324P-15AT1 (mesmo formato e footprint) — diferindo em Package, ADC, EEPROM, Maximum Clock Frequency, SRAM.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA324A-AU
✅ Drop-In✓ Em estoque
$2.09 / unidade
Ver ficha técnica →ATMEGA324PA-AU
✅ Drop-In✓ Em estoque
$2.87 / unidade
Ver ficha técnica →ATMEGA32-16AUR
✅ Drop-In✓ Em estoque
$3.41 / unidade
Ver ficha técnica →ATMEGA16A-AU
✅ Drop-In✓ Em estoque
$2.05 / unidade
Ver ficha técnica →ATMEGA644P-AU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA1284P-AU
✅ Drop-In✓ Em estoque
$4.65 / unidade
Ver ficha técnica →ATMEGA169PV-8AUR
✅ Drop-In✓ Em estoque
$4.16 / unidade
Ver ficha técnica →ATMEGA324P-15AT1 Classificações máximas e características elétricas
| Core | 8-bit AVR RISC |
| Core Size | 8-Bit |
| Frequência máxima de clock | 16 MHz |
| Program Memory Size | 32 KB (16K x 16) Flash |
| SRAM Size | 2 KB |
| EEPROM Size | 1 KB |
| Number of I/O | 32 general purpose I/O lines |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Encapsulamento | 44-TQFP (10x10 mm) |
| Tipo de montagem | Surface Mount |
| Qualification | Automotive, AEC-Q100 |
| Programming | ISP (In-System Programmable), read-while-write |
| ADC | 8-channel 10-bit (per ATmega324P family) |
| Serial Interfaces | USART, SPI, TWI (I2C) |
| Timers | Two 8-bit, one 16-bit timer plus real-time counter |
| Low Power Technology | picoPower with idle, power-down, power-save modes |
| Working Registers | 32 general purpose working registers |
| On-Chip Debug | ICSP via 2 I/O pins + reset line |
Guia de Configuração de Pinos do ATMEGA324P-15AT1 44-tqfp (10x10 mm)
Configuração de pinos para ATMEGA324P-15AT1 (pacote 44-tqfp (10x10 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATMEGA324P-15AT1.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATMEGA324P-15AT1 é adequado para 6 aplicaçãos: Automotive Body and Comfort Control Modules, Industrial Sensor Nodes and Data Loggers, Home Appliance and Consumer Control Boards, Battery-Powered Portable Instruments, Motor Control and PWM Actuation, Communication Gateways and Protocol Converters.
Automotive Body and Comfort Control Modules
The ATMEGA324P-15AT1 is AEC-Q100 qualified, making it a natural fit for automotive body electronics such as seat controllers, mirror actuators, lighting modules, and door-zone ECUs where cost per node is critical. Its 32 general purpose I/O lines drive relays, lamps, and switches directly, while the 8-channel 10-bit ADC reads potentiometer position and diagnostic current-sense inputs. The wide 2.7V to 5.5V supply range tolerates automotive 12V rail transients after a front-end regulator, and picoPower sleep modes keep key-off battery drain low. Firmware updates in the field are handled through the ISP boot section over LIN-style UART links, avoiding dealer reflash tooling.
Recomendado
Industrial Sensor Nodes and Data Loggers
In factory automation, the ATMEGA324P-15AT1 reads 4-20 mA current loops and resistive sensors through its 8-channel 10-bit ADC, processes scaling in the 16 MHz AVR core, and transmits results over the USART or the two-wire TWI interface to a display or gateway. The 2 KB SRAM buffers sensor histories, while the 1 KB EEPROM stores calibration constants that survive power cycles without external memory. The 5V-tolerant I/O simplifies interfacing with legacy 24V-scaled industrial signal conditioning, and power-down sleep modes suit intermittently powered loggers. Because the AVR toolchain (AVR-GCC, MPLAB X) is free and mature, long-life industrial products avoid tooling obsolescence risk.
Recomendado
Home Appliance and Consumer Control Boards
Washing machines, rice cookers, fan controllers, and thermostats use the ATMEGA324P-15AT1 because one 44-TQFP device replaces discrete logic, timers, and a display driver: 32 I/O lines drive 7-segment or LED-matrix displays directly with multiplexing from the 16-bit timer, while the ADC reads NTC temperature sensors and user potentiometers. The picoPower power-save mode with the real-time counter wakes the unit once per second for standby clock displays at minimal current. The wide 2.7V to 5.5V operating range allows direct battery or half-wave rectified supply architectures, and the EEPROM retains user settings through power interruptions.
Recomendado
Battery-Powered Portable Instruments
Handheld meters, weather stations, and portable testers benefit from the ATMEGA324P-15AT1's picoPower technology: in power-down mode with only the real-time counter or pin-change interrupt armed, standby current drops to microamp levels, extending multi-cell battery life. The 3.3V operation point sits comfortably inside the 2.7V to 5.5V range, and the 10-bit ADC samples battery voltage for fuel-gauge indication. The 44-TQFP 10x10 mm footprint fits compact PCBs, while SPI and TWI interfaces connect external flash, displays, and RF modules. Choose the related ATMEGA324PA-AU if your minimum supply voltage falls below 2.7V.
Recomendado
Motor Control and PWM Actuation
The ATMEGA324P-15AT1 generates multi-channel PWM from its two 8-bit timers and one 16-bit timer, enabling control of DC fan motors, servos, and small brushed or stepper motors via external drivers. Timer input-capture and compare channels implement closed-loop speed control using Hall or encoder feedback into the 10-bit ADC or external interrupt pins. The 16 MHz core executes PI control loops with margin to spare at typical 1-20 kHz PWM frequencies. Its AEC-Q100 qualification also covers automotive fan modules and actuator drivers where 12V transients and wide temperature ranges are routine, and 32 I/O lines leave headroom for limit switches and diagnostics.
Recomendado
Communication Gateways and Protocol Converters
With one USART, one SPI, and one two-wire TWI interface available simultaneously, the ATMEGA324P-15AT1 bridges protocols such as Modbus RTU (UART) to I2C sensor buses or SPI peripherals, a common requirement in building automation and retrofit industrial systems. The 32 KB Flash accommodates two complete protocol stacks plus a bootloader, and read-while-write self-programming allows configuration updates from the communications link. The 16 MHz clock supports UART rates well beyond 115200 baud, and the 5V I/O directly drives legacy RS-485 transceivers without level shifting, reducing bill-of-material cost in brownfield installations.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA324P-15AT1 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA324A-AU | ATMEGA324PA-AU | ATMEGA32-16AUR | ATMEGA1284P-AU |
|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB (16K x 16) | 32 KB | 32 KB | 32 KB | 128 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 16 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 4 KB |
| Maximum Clock Speed | 16 MHz | 16 MHz | 20 MHz | 16 MHz | 20 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower Low-Sleep-Current Technology | Yes | No | Yes | No | Yes |
Principais diferenciais
- AEC-Q100 automotive qualification at mainstream pricing (vs ATMEGA324A-AU)
- picoPower sleep current over the legacy generation (vs ATMEGA32-16AUR)
- Upgrade path without PCB respin (vs ATMEGA1284P-AU)
Notas de projeto
Decouple every VCC and AVCC pin with 100 nF ceramic capacitors placed within 3-5 mm of the pins, plus 10 uF bulk capacitance near the device. Connect AVCC to VCC through a low-pass LC filter when ADC accuracy matters; AVR datasheets recommend keeping AVCC ripple below 0.3 Vpp for full 10-bit ADC accuracy. At 16 MHz and 5.5V, active current is in the low-milliamp range, but inductive transient loads (relays, motors) on nearby I/O can inject supply noise - separate analog and digital ground returns that rejoin at a single point.
Clock fuses are the single most common lock-out cause on ATmega parts: if you select the external crystal/clock fuse option without a functioning crystal, ISP programming becomes unreachable because the core has no clock. Always test fuse changes on a bench board first, keep a HV parallel programmer available for recovery, and never enable debugWIRE or RSTDISBL unless you can recover the part. The 15AT1 speed grade is rated for 16 MHz - do not assume 20 MHz operation like the PA variant.
The 44-TQFP 0.8 mm pitch footprint needs no special assembly beyond standard SMT practice, but plan pin usage before routing: PC2-PC7 multiplex JTAG (TCK/TMS/TDO/TDI) and the 32 kHz TOSC oscillator, so dedicating these to JTAG keeps in-circuit debugging available while external interrupt and I2C functions go to other ports. Route the XTAL1/XTAL2 crystal traces short (under 10 mm) with guard grounds, and reserve a 6-pin ICSP header (MOSI, MISO, SCK, RESET, VCC, GND) on every production PCB.
The reset pin is the vulnerable node in noisy automotive environments: add an external 10 kOhm pull-up and 100 nF capacitor, and consider the internal brown-out detector fuse to prevent corrupt EEPROM writes during supply dips. For long RS-485 or LIN lines driven from the USART, add series 100 ohm resistors at the MCU side and TVS protection at the connector; the 5V-tolerant I/O simplifies direct transceiver interfacing without level shifters.
Informações de conformidade
Automotive, AEC-Q100 qualification per DigiKey and FindIC product data. RoHS/REACH/lead-free status not stated in the provided web data - verify on the Microchip product page.