8-bit AVR microcontrollers, from:

Datasheet: [ pdf ]

Features:

* Program/Data Memory:
     - 8kB Flash Memory programmed in serial mode with ISP capability;
     - 1kB RAM;
     - 512B EEPROM;
* I/O lines: 23;
* Peripheral Features:
     - Timer/Counters: two 8-bit and one 16-bit;
     - Serial USART;
     - SPI Interface (Master/Slave Mode);
     - Two-wire Serial Interface;
     - Real Time Counter;
     - Analog Comparator;
     - Programmable Watchdog Timer with Separate Oscillator;
     - Internal Oscillator;
     - Power-on Reset;
     - Programmable Brown-out Detection;
     - 10-bit ADC
* Low Power Mode;s: Idle, ADC Noise Reduction, Power-save, Power-down, Standby;
* Supply Voltage:
     - ATMEGA8:         4.5÷5.5V
     - ATMEGA8L:       2.7÷5.5V
     - ATMEGA8A:       2.7÷5.5V
* Temperature Range: -40÷85°C;
* Speed Grade:
     - ATMEGA8:         0÷16MHz
     - ATMEGA8L:       0÷8MHz
     - ATMEGA8A:       0÷16MHz
* Package options: PDIP28 0.3”, TQFP32

The ATMEGA8A is a functionally identical, drop-in replacement for the ATMEGA(L).
 

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All products are RoHS compliant