ATMEGA644P-A15AZ - 64KB Flash 16MHz 5V AVR MCU | Microchip
MPN: ATMEGA644P-A15AZ ✗ Akhir HidupATMEGA644P-A15AZ Ringkasan
An 8-bit microcontroller is a single-chip computer whose data bus, ALU, and registers operate on 8-bit words. In the system hierarchy it belongs to the embedded processor family: microcontroller -> embedded MCU -> semiconductor IC. Microcontrollers such as the ATMEGA644P-A15AZ integrate CPU, program memory, data memory, peripherals (USART, SPI, I2C/TWI, timers, ADC), and I/O ports on a single die, replacing multi-chip processor boards in cost- and power-sensitive designs. The AVR architecture executes most instructions in a single clock cycle, delivering throughput approaching 1 MIPS per MHz.
Key features of the ATMEGA644P-A15AZ include 64KB of self-programmable Flash memory, 4KB of internal SRAM, 2KB of EEPROM for non-volatile data storage, and 53 general-purpose I/O lines across four 8-bit ports. The picoPower 'P' suffix denotes low-power AVR core operation, and the device provides two USARTs for serial communication. The integrated 10-bit ADC supports up to 8 channels, and six PWM channels support motor and lighting control.
Technically, the AVR enhanced RISC core combines a rich instruction set with 32 general-purpose working registers, all directly connected to the ALU, allowing two independent registers to be accessed in one instruction executed in one clock cycle. The A15AZ speed-grade marking is characterized at 5V and 16 MHz across the -40C to +85C (or +105C) automotive temperature range, satisfying AEC-Q100 stress-test requirements as evidenced by the 'AZ' suffix and the automotive qualification trail documented on the Microchip product page.
Typical applications include industrial control and automation nodes, embedded instrumentation and data loggers, automotive body and chassis subsystems, and consumer appliance control boards, where the 5V-tolerant I/O and 53 I/O lines simplify direct connection to sensors, keypads, displays, and actuators without level shifting.
Design consideration: the ATMEGA644P-A15AZ is specified for a 4.5V to 5.5V supply; designs targeting 3.3V operation must instead select the picoPower ATMEGA644PA family or a low-voltage variant, since this A15AZ speed-grade part is characterized at 5V and 16 MHz. Microchip lists the ATmega644P family as a mature product, not recommended for new designs, replaced by the ATmega644PA.
This page synthesizes distributor stock and pricing signals, drop-in alternative cross-references from verified web data, and practical design guidance not found in the manufacturer datasheet alone, providing engineers a single decision-ready resource.
Alternatif penggantian untuk ATMEGA644P-A15AZ — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ATMEGA644P-A15AZ (sama faktor bentuk dan footprint) — berbeda di dalam EEPROM, Operating Temperature, Package, SRAM, Program Memory (Flash).
ATMEGA644P-15AT1
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ATMEGA644PA-AU
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA644P-20PU
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA324PV-10AU
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA644P-A15AZ Rating Maksimal & Karakteristik Listrik
| Core Architecture | AVR enhanced RISC 8-bit |
| Program Memory (Flash) | 64 KB |
| SRAM | 4 KB |
| EEPROM | 2 KB |
| Maximum Clock Speed | 16 MHz |
| Supply Voltage (Vcc) | 4.5 V to 5.5 V |
| General-Purpose I/O Pins | 53 |
| ADC | 10-bit, 8 channels |
| USART | 2 |
| SPI | 1 |
| TWI (I2C) | 1 |
| PWM Channels | 6 |
| Timers/Counters | 2x 8-bit + 1x 16-bit |
| Suhu Kerja | -40 C to +85 C (industrial) / -40 C to +105 C (automotive grade) |
| Paket | 44-pin TQFP (10x10 mm) |
| Tipe Mounting | Surface Mount |
| Automotive Qualification | AEC-Q100 (per AZ speed-grade suffix) |
| Status RoHS | Compliant |
Konfigurasi Pin ATMEGA644P-A15AZ
| Pin produk 1 | PB5 (MOSI) — Port B bit 5 / SPI MOSI |
| Pin produk 2 | PB6 (MISO) — Port B bit 6 / SPI MISO |
| Pin produk 3 | PB7 (SCK) — Port B bit 7 / SPI SCK |
| Pin produk 4 | RESET — Reset input, active low |
| Pin produk 5 | VCC — Digital supply voltage |
| Pin produk 6 | GND — Digital ground |
| Pin produk 7 | XTAL2 — Crystal oscillator pin 2 |
| Pin produk 8 | XTAL1 — Crystal oscillator pin 1 |
| Pin produk 9 | PD0 (RXD0) — Port D bit 0 / USART0 RXD |
| Pin produk 10 | PD1 (TXD0) — Port D bit 1 / USART0 TXD |
| Pin produk 11 | PD2 (INT0) — Port D bit 2 / External INT0 |
| Pin produk 12 | PD3 (INT1) — Port D bit 3 / External INT1 |
| Pin produk 13 | PD4 (OC1B) — Port D bit 4 / Timer1 output compare B |
| Pin produk 14 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A |
| Pin produk 15 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| Pin produk 16 | PD7 (OC2) — Port D bit 7 / Timer2 output compare |
| Pin produk 17 | VCC — Digital supply voltage |
| Pin produk 18 | GND — Digital ground |
| Pin produk 19 | PC0 (SCL) — Port C bit 0 / TWI SCL |
| Pin produk 20 | PC1 (SDA) — Port C bit 1 / TWI SDA |
| Pin produk 21 | PC2 (TCK) — Port C bit 2 / JTAG TCK |
| Pin produk 22 | PC3 (TMS) — Port C bit 3 / JTAG TMS |
| Pin produk 23 | PC4 (TDO) — Port C bit 4 / JTAG TDO |
| Pin produk 24 | PC5 (TDI) — Port C bit 5 / JTAG TDI |
| Pin produk 25 | PC6 (TOSC1) — Port C bit 6 / Timer0 oscillator |
| Pin produk 26 | PC7 (TOSC2) — Port C bit 7 / Timer0 oscillator |
| Pin produk 27 | AVCC — Analog supply voltage |
| Pin produk 28 | AREF — ADC reference voltage |
| Pin produk 29 | AGND — Analog ground |
| Pin produk 30 | PA7 (ADC7) — Port A bit 7 / ADC input channel 7 |
| Pin produk 31 | PA6 (ADC6) — Port A bit 6 / ADC input channel 6 |
| Pin produk 32 | PA5 (ADC5) — Port A bit 5 / ADC input channel 5 |
| Pin produk 33 | PA4 (ADC4) — Port A bit 4 / ADC input channel 4 |
| Pin produk 34 | PA3 (ADC3) — Port A bit 3 / ADC input channel 3 |
| Pin produk 35 | PA2 (ADC2) — Port A bit 2 / ADC input channel 2 |
| Pin produk 36 | PA1 (ADC1) — Port A bit 1 / ADC input channel 1 |
| Pin produk 37 | PA0 (ADC0) — Port A bit 0 / ADC input channel 0 |
| Pin produk 38 | VCC — Digital supply voltage |
| Pin produk 39 | GND — Digital ground |
| Pin produk 40 | PB0 (XCK0) — Port B bit 0 / USART0 clock |
| Pin produk 41 | PB1 (T1) — Port B bit 1 / Timer1 external clock |
| Pin produk 42 | PB2 (AIN0) — Port B bit 2 / Analog comparator + |
| Pin produk 43 | PB3 (AIN1) — Port B bit 3 / Analog comparator - |
| Pin produk 44 | PB4 (SS) — Port B bit 4 / SPI slave select |
Aplikasi Umum
ATMEGA644P-A15AZ cocok untuk 6 aplikasis: Automotive Body Control Module, Industrial Sensor Data Logger, Embedded Instrumentation and Metering, Consumer Appliance Control Board, HVAC and Building Automation Nodes, Educational and Hobbyist Development Boards.
Automotive Body Control Module
The ATMEGA644P-A15AZ suits automotive body control modules (BCM) where 53 I/O lines, 5 V tolerance, and AEC-Q100 stress-test qualification (AZ suffix) are required for door, lighting, and accessory control. Its 64 KB Flash holds BCM firmware plus CAN/LIN driver tables, while 4 KB SRAM comfortably buffers switch-debounce state machines and 2 KB EEPROM retains user-configurable settings such as seat memory positions across power cycles. The 16 MHz AVR core executes control logic at 16 MIPS, comfortably handling 10 ms body-control task loops.
Direkomendasikan
Industrial Sensor Data Logger
For multi-channel industrial sensor data loggers, the ATMEGA644P-A15AZ offers a 10-bit 8-channel ADC paired with 2 KB EEPROM and 64 KB Flash, enabling local storage of calibration coefficients and 30-60 days of logged samples. The 5 V I/O tolerance accepts legacy industrial transducer outputs directly without level shifting, and 53 I/O lines support keypad entry, LCD drives, and discrete status LEDs. The picoPower sleep modes reduce quiescent draw to a few microamps for battery-backed remote telemetry nodes.
Direkomendasikan
Embedded Instrumentation and Metering
In digital panel meters, energy monitors, and HVAC controllers, the ATMEGA644P-A15AZ provides the deterministic real-time response that AVR cores are known for, with two USARTs allowing simultaneous Modbus master/slave operation and the 6 PWM channels driving analog-style displays or valve actuators. The 44-pin TQFP footprint fits behind standard 96x96 mm meter front panels, and the -40 C to +85 C operating range covers most indoor and outdoor metering enclosures without additional thermal hardening.
Direkomendasikan
Consumer Appliance Control Board
The ATMEGA644P-A15AZ is well-matched to washing machine, dishwasher, and induction-cooktop control boards, where its 5 V tolerance and 53 I/O lines interface directly to triac drivers, rotary encoders, and 7-segment displays. The 6 PWM channels drive variable-speed BLDC motor control through gate drivers, while the 16 MHz throughput executes sensor-fusion control loops within 1 ms. The picoPower architecture reduces standby consumption to meet Energy Star appliance idle-power budgets.
Direkomendasikan
HVAC and Building Automation Nodes
For BACnet, Modbus, or KNX building automation nodes, the ATMEGA644P-A15AZ supplies 64 KB of firmware headroom for protocol stacks, scheduling logic, and on-board web servers over Ethernet. Its two USARTs bridge to RS-485 sensor busses while SPI serves wireless or Ethernet modules. The automotive-grade temperature tolerance handles unconditioned mechanical rooms and rooftop installations, where -40 C cold-start and +105 C summer heat are common.
Direkomendasikan
Educational and Hobbyist Development Boards
The ATMEGA644P-A15AZ and its DIP-package siblings are popular in university embedded-systems courses, Arduino-variant boards, and open-source hardware projects because of the deterministic AVR toolchain (avr-gcc, AVR Studio), abundant reference designs, and 53 I/O lines that allow multiple peripheral exercises on a single board. The 5 V-only operation matches classic Arduino shields, and the dual USARTs enable serial-monitor debugging alongside project-specific bus traffic without conflict.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ATMEGA644P-A15AZ — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ATMEGA644P-15AT1 | ATMEGA644PA-AU | ATMEGA324PV-10AU |
|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 2 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 1 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 20 MHz | 10 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| GPIO Pins | 53 | 53 | 53 | 53 |
| Automotive Grade (AEC-Q100) | Yes (AZ suffix) | Industrial grade | Industrial grade | Industrial grade |
| Lifecycle Status | NRND | NRND | Active | Active |
Diferensiator Kunci
- AEC-Q100 automotive grade with 105 C operating temperature (vsATMEGA644PA-AU)
- Highest Flash density in the 44-TQFP AVR family at 16 MHz (vsATMEGA324PV-10AU)
- Dual USART for multi-bus industrial networking (vsATMEGA164A-AU)
Catatan Desain
The ATMEGA644P-A15AZ requires a stable 4.5 V to 5.5 V supply; place a 100 nF ceramic decoupling capacitor within 5 mm of each VCC pin (44-TQFP has multiple VCC/GND pins) and a bulk 10 uF tantalum or ceramic at the regulator output. The picoPower architecture supports six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) that drop quiescent current to <1 uA in Power-down mode. For automotive designs, add a TVS diode on the VCC line and an input fuse per ISO 7637-2 transient immunity requirements.
Do not assume the ATMEGA644P-A15AZ operates at 3.3 V - the A15AZ speed grade is characterized at 5 V and 16 MHz only. Mixing 3.3 V peripherals on the same I/O rail without level shifting will violate Vih specifications. Use the ATMEGA644PA family for low-voltage designs. Also note that the part is NRND per Microchip; for new designs, choose the ATMEGA644PA-AU which is pin-compatible, supports 1.8-5.5 V, and has active lifecycle status.
Place the 16 MHz crystal or resonator within 10 mm of XTAL1/XTAL2 pins, with the load capacitors (typically 22 pF for HC-49S crystals) returned to analog ground. Keep ADC traces (PA0-PA7, AVCC, AREF, AGND) away from switching nodes and route AGND as a separate net that joins GND only at the regulator ground point (star grounding). For JTAG/debugWire, bring out the RESET, PC2-PC5 (TCK/TMS/TDO/TDI) signals to a 2x5 0.05" header for in-circuit programming with Atmel-ICE or AVR Dragon.
Informasi Konformitas
AEC-Q100 qualification per AZ speed-grade suffix. RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free per package documentation.