Microchip Technology ATMEGA645A-AU
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $6.06 | $6.06 |
| 15+ | $5.87 | $88.05 |
| 25+ | $5.74 | $143.50 |
| 50+ | $5.42 | $271.00 |
| 100+ | $4.79 | $479.00 |
| N+ | $0.96 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Microchip Technology |
| Product Series | AVR® ATmega |
| Packaging | Tray | |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16MHz |
| Connectivity | SPI, UART/USART, USI |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 54 |
| Program Memory Size | 64KB (32K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 2K x 8 |
| RAM Size | 4K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.5V |
| Data Converters | A/D 8x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification AEC | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | 64-TQFP (14x14) |
| Package / Case | 64-TQFP |
| ROHS |  |
The Microchip ATMEGA645A-AU is a high-performance 8-bit AVR microcontroller with 64KB flash memory and 4KB SRAM. Operating from 1.8V to 5.5V at speeds up to 16MHz, it integrates brown-out detection, power-on reset, PWM, and a watchdog timer. The 64-TQFP package is ideal for space-constrained industrial and consumer applications requiring reliable operation across -40°C to 85°C.
- Wide voltage range (1.8V-5.5V): Enables direct battery operation and simplifies power supply design.
- 64KB flash memory: Ample space for complex firmware and data logging without external storage.
- Integrated safety features: Brown-out reset and watchdog timer ensure system reliability in harsh environments.
- Compact 64-TQFP package: Saves PCB area while providing enough I/O for peripheral interfacing.
Industrial Sensor Nodes
The 1.8V minimum supply voltage allows direct operation from two AA batteries, while the 16MHz AVR core handles sensor data acquisition and preprocessing with low power consumption.
Portable Medical Monitors
With 64KB flash and 4KB SRAM, it can store patient logs and run real-time monitoring algorithms. The -40°C to 85°C range ensures reliable operation in clinical environments.
Smart Home Controllers
PWM channels enable dimming and motor control for smart blinds or fans. The 64-TQFP package fits into wall-mounted control panels with limited space.
Automotive Aftermarket Modules
Brown-out detection and WDT provide fail-safe operation in vehicles with fluctuating supply voltages. The 5.5V maximum input tolerates unregulated automotive power rails.
Data Logging Systems
4KB SRAM buffers sensor bursts before writing to external EEPROM or SD cards. The 16MHz clock allows fast SPI communication for high-throughput logging.
Battery-Powered Remote Controls
Low-voltage operation extends battery life, while the integrated POR eliminates the need for external reset ICs, reducing BOM cost.
- Q: What is the operating voltage range of the ATMEGA645A-AU?
- A: The ATMEGA645A-AU operates from 1.8V to 5.5V, making it suitable for battery-powered and low-voltage applications.
- Q: How much flash memory does this AVR MCU have?
- A: It features 64KB of in-system programmable flash memory (32K x 16), along with 4K x 8 SRAM.
- Q: What package is the ATMEGA645A-AU available in?
- A: It comes in a 64-pin TQFP package, ideal for compact PCB designs.
- Q: Does it include a watchdog timer?
- A: Yes, it includes a Watchdog Timer (WDT) along with Brown-out Detection and Power-on Reset.
ATMEGA645A-AU.pdf
- Q: What is the operating voltage range of the ATMEGA645A-AU?
- A: The ATMEGA645A-AU operates from 1.8V to 5.5V, making it suitable for battery-powered and low-voltage applications.
- Q: How much flash memory does this AVR MCU have?
- A: It features 64KB of in-system programmable flash memory (32K x 16), along with 4K x 8 SRAM.
- Q: What package is the ATMEGA645A-AU available in?
- A: It comes in a 64-pin TQFP package, ideal for compact PCB designs.
- Q: Does it include a watchdog timer?
- A: Yes, it includes a Watchdog Timer (WDT) along with Brown-out Detection and Power-on Reset.
