{"product_id":"atmega645a-au","title":"ATMEGA645A-AU","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide voltage range (1.8V-5.5V):\u003c\/strong\u003e Enables direct battery operation and simplifies power supply design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e64KB flash memory:\u003c\/strong\u003e Ample space for complex firmware and data logging without external storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated safety features:\u003c\/strong\u003e Brown-out reset and watchdog timer ensure system reliability in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 64-TQFP package:\u003c\/strong\u003e Saves PCB area while providing enough I\/O for peripheral interfacing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIndustrial Sensor Nodes\u003c\/h3\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003ch3\u003ePortable Medical Monitors\u003c\/h3\u003e\u003cp\u003eWith 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.\u003c\/p\u003e\u003ch3\u003eSmart Home Controllers\u003c\/h3\u003e\u003cp\u003ePWM channels enable dimming and motor control for smart blinds or fans. The 64-TQFP package fits into wall-mounted control panels with limited space.\u003c\/p\u003e\u003ch3\u003eAutomotive Aftermarket Modules\u003c\/h3\u003e\u003cp\u003eBrown-out detection and WDT provide fail-safe operation in vehicles with fluctuating supply voltages. The 5.5V maximum input tolerates unregulated automotive power rails.\u003c\/p\u003e\u003ch3\u003eData Logging Systems\u003c\/h3\u003e\u003cp\u003e4KB SRAM buffers sensor bursts before writing to external EEPROM or SD cards. The 16MHz clock allows fast SPI communication for high-throughput logging.\u003c\/p\u003e\u003ch3\u003eBattery-Powered Remote Controls\u003c\/h3\u003e\u003cp\u003eLow-voltage operation extends battery life, while the integrated POR eliminates the need for external reset ICs, reducing BOM cost.\u003c\/p\u003e\u003ctable\u003e\n\u003ccolgroup\u003e\u003ccol\u003e\u003c\/colgroup\u003e \u003ctbody\u003e \u003ctr\u003e \t\u003ctd\u003eProduct attributes\u003c\/td\u003e \t\u003ctd\u003eProperty Value\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eManufacturer\u003c\/td\u003e \t\u003ctd\u003eMicrochip Technology\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProduct Series\u003c\/td\u003e \t\u003ctd\u003eAVR® ATmega\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackaging\u003c\/td\u003e \t\u003ctd\u003eTray | \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eCore Processor\u003c\/td\u003e \t\u003ctd\u003eAVR\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eCore Size\u003c\/td\u003e \t\u003ctd\u003e8-Bit\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSpeed\u003c\/td\u003e \t\u003ctd\u003e16MHz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eConnectivity\u003c\/td\u003e \t\u003ctd\u003eSPI, UART\/USART, USI\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePeripherals\u003c\/td\u003e \t\u003ctd\u003eBrown-out Detect\/Reset, POR, PWM, WDT\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eNumber of I\/O\u003c\/td\u003e \t\u003ctd\u003e54\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProgram Memory Size\u003c\/td\u003e \t\u003ctd\u003e64KB (32K x 16)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProgram Memory Type\u003c\/td\u003e \t\u003ctd\u003eFLASH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eEEPROM Size\u003c\/td\u003e \t\u003ctd\u003e2K x 8\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eRAM Size\u003c\/td\u003e \t\u003ctd\u003e4K x 8\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Supply (Vcc\/Vdd)\u003c\/td\u003e \t\u003ctd\u003e1.8V ~ 5.5V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eData Converters\u003c\/td\u003e \t\u003ctd\u003eA\/D 8x10b\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOscillator Type\u003c\/td\u003e \t\u003ctd\u003eInternal\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOperating Temperature\u003c\/td\u003e \t\u003ctd\u003e-40°C ~ 85°C (TA)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eGrade\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eQualification AEC\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eMounting Type\u003c\/td\u003e \t\u003ctd\u003eSurface Mount\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSupplier Device Package\u003c\/td\u003e \t\u003ctd\u003e64-TQFP (14x14)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackage \/ Case\u003c\/td\u003e \t\u003ctd\u003e64-TQFP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e   \u003ctd\u003eROHS\u003c\/td\u003e   \u003ctd\u003e\u003cimg class=\"ROSHICON\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0910\/9756\/3425\/files\/ROHSICON.png?v=1757832376\"\u003e\u003c\/td\u003e  \u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cdl\u003e\n\u003cdt\u003eQ: What is the operating voltage range of the ATMEGA645A-AU?\u003c\/dt\u003e\n\u003cdd\u003eA: The ATMEGA645A-AU operates from 1.8V to 5.5V, making it suitable for battery-powered and low-voltage applications.\u003c\/dd\u003e\n\u003cdt\u003eQ: How much flash memory does this AVR MCU have?\u003c\/dt\u003e\n\u003cdd\u003eA: It features 64KB of in-system programmable flash memory (32K x 16), along with 4K x 8 SRAM.\u003c\/dd\u003e\n\u003cdt\u003eQ: What package is the ATMEGA645A-AU available in?\u003c\/dt\u003e\n\u003cdd\u003eA: It comes in a 64-pin TQFP package, ideal for compact PCB designs.\u003c\/dd\u003e\n\u003cdt\u003eQ: Does it include a watchdog timer?\u003c\/dt\u003e\n\u003cdd\u003eA: Yes, it includes a Watchdog Timer (WDT) along with Brown-out Detection and Power-on Reset.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Microchip Technology","offers":[{"title":"Default Title","offer_id":50884049797409,"sku":"ATMEGA645A-AU","price":6.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0910\/9756\/3425\/files\/IC_MCU_150_64A_A_64_04b5a072-de57-4b7f-97a9-96daae8b376b.jpg?v=1739253379","url":"https:\/\/hqickey.com\/products\/atmega645a-au","provider":"HQICKEY","version":"1.0","type":"link"}