High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family

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

• 4K/8K/16KBytes of In-System Self-Programmable Flash program Memory
• 256/512/512Bytes EEPROM
• 512/1K/1KBytes Internal SRAM
• Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
• Data Retention: 20 years at 85°C/100 years at 25°C(1)
• Optional Boot Code Section with Independent Lock Bits

In-System Programming by On-chip Boot Program

True Read-While-Write Operation

• Programming Lock for Software Security

Atmel® QTouch® Library Support

• Capacitive Touch Buttons, Sliders and Wheels
• QTouch and QMatrix® Acquisition
• Up to 64 sense channels

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
• 8-channel 10-bit ADC in TQFP and QFN/MLF package

Temperature Measurement

• 6-channel 10-bit ADC in PDIP Package
• Two Master/Slave SPI Serial Interface
• One Programmable Serial USART
• One Byte-oriented 2-wire Serial Interface (Philips I2C compatible)
• Programmable Watchdog Timer with Separate On-chip Oscillator
• One On-chip Analog Comparator
• Interrupt and Wake-up on Pin Change

Special Microcontroller Features

• Power-on Reset and Programmable Brown-out Detection
• Internal Calibrated Oscillator
• External and Internal Interrupt Sources
• Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and

Extended Standby

I/O and Packages

• 23 Programmable I/O Lines
• 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF

Operating Voltage:

• 2.7 - 5.5V for ATmega48/88/168
• 1.8 - 5.5V for ATmega48V/88V/168V

Temperature Range:

• 40°C to 85°C

Speed Grade:

• ATmega48/88/168: 0 - 10MHz @ 2.7V - 5.5V, 0 - 20MHz @ 4.5V - 5.5V
• ATmega48V/88V/168V: 0 - 4MHz @ 1.8V - 5.5V, 0 - 10MHz @ 2.7V - 5.5V

Power Consumption at 1MHz, 1.8V, 25°C

• Active Mode: 0.3mA
• Power-down Mode: 0.1μA
• Power-save Mode: 0.8μA (Including 32kHz RTC)