Product Overview: ATMEGA48-20MMU

The ATMEGA48-20MMU is a high-performance, low-power Microchip picoPower™ 8-bit AVR® RISC-based microcontroller that combines 4KB ISP flash memory, 512B EEPROM, 512-Byte SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, a 6-channel 10-bit A/D converter (8 channels in TQFP and QFN/MLF packages), programmable watchdog timer with internal oscillator, and five software selectable power saving modes. This feature-rich device provides a highly flexible and cost-effective solution for many embedded control applications.

The ATmega48 operates at a voltage range of 1.8-5.5 volts. At 20MHz, it achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed. The device comes in a 28-pin 4mm x 4mm QFN/MLF package, making it suitable for space-constrained applications while still offering ample I/O options and features.

Key Features:

• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
• 131 Powerful Instructions – Most Single Clock Cycle Execution
• 32 x 8 General Purpose Working Registers
• Fully Static Operation
• Up to 20 MIPS Throughput at 20MHz
• On-chip 2-cycle Multiplier

High Endurance Non-volatile Memory segments:

• 4KB of In-System Self-Programmable Flash program memory
• 512B EEPROM
• 512 Byte Internal SRAM
• Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
• Data retention: 20 years at 85°C/100 years at 25°C(1)

Peripheral Features:

• Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
• One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
• Real Time Counter with Separate Oscillator
• Six PWM Channels
• Programmable Serial USART
• Master/Slave SPI Serial Interface
• Byte-oriented 2-wire Serial Interface (Philips I2C compatible)
• Programmable Watchdog Timer with Separate On-chip Oscillator
• On-chip Analog Comparator
• Interrupt and Wake-up on Pin Change

The integration of such a broad range of features makes the ATMEGA48-20MMU an ideal choice for applications that require a balance between power efficiency and processing capability, such as battery-operated devices, sensor networks, and other portable applications.

(1) Reliability Qualification results show that the projected data retention failure rate is much less than 1 PPM over 20 years at 85°C or 100 years at 25°C.