Микроконтроллеры

Например - ATmegaX8PA. ..... Data retention: 20 years at 85°C/100 years at 25°C ⁽¹⁾ ..... ..... ⁽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.