PIC16C57

Peripheral Features:

8-bit real time clock/counter (TMR0) with 8-bit 
programmable prescaler
Power-On Reset (POR)
Device Reset Timer (DRT)
Watchdog Timer (WDT) with its own on-chip
RC oscillator for reliable operation
Programmable code-protection
Power saving SLEEP mode
Selectable oscillator options:
- RC: Low-cost RC oscillator
- XT: Standard crystal/resonator
- HS: High-speed crystal/resonator
- LP: Power saving, low-frequency crystal