OVERVIEW

The S93WD662 and S93WD663 are precision power supervisory circuits providing both active high and active low reset outputs. Both devices incorporate a watchdog timer with a nominal time-out value of 1.6 seconds.

FEATURES

• Precision Monitor & RESET Controller

— RESET and RESET# Outputs

— Guaranteed RESET Assertion to VCC = 1V

— 200ms Reset Pulse Width

— Internal 1.26V Reference with ±1 Accuracy

— ZERO External Components Required

• Watchdog Timer

— Nominal 1.6 Second Time-out Period

— Reset by Any Transition of CS

• Memory

— 4K-bit Microwire Memory

— S93WD662

– Internally Ties ORG Low

– 100 Compatible With all 8-bit Implementations

– Sixteen Byte Page Write Capability

— S93WD663

– Internally Ties ORG High

– 100 Compatible With all 16-bit Implementations

– Eight Word Page Write Capability