1.1 FEATURES  Features Selection Table CHIP ROM RAM Stack Timer I/O IHRC PWM Buzzer Wake-up Pin No. Package T0 TC0 SN8P2501B 1K 48 4 V V 12 V 1 1 5 DIP14/SOP14/SSOP16 SN8P2511 1K 48 4 V V 12 V 1 1 5 DIP14/SOP14/SSOP16  Memory configuration  Fcpu (Inst