OVERVIEW

The S93WD462 and S93WD463 are precision power supervisory circuits providing both active high and active low reset output. Both devices also incorporate a watchdog timer with a nominal time-out value of 1.6 seconds.

Both devices have 1k-bits of E2PROM memory that is accessible via the industry standard microwire bus. The S93WD462 is configured with an internal ORG pin tied low providing a 8-bit byte organization and the S93WD463 is configured with an internal ORG pin tied high providing a 16-bit word organization. Both the S93WD462 and S93WD463 have page write capability. The devices are designed for a minimum 100,000 program/erase cycles and have data retention in excess of 100 years.

FEATURES

? Precision Monitor & RESET Controller

— RESET and RESET Outputs

— Guaranteed RESET Assertion to VCC = 1V

— 150ms 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

— 1K-bit Microwire Memory

— S93WD462

– Internally Ties ORG Low

– 100 Compatible With all 8-bit

Implementations

– Sixteen Byte Page Write Capability

— S93WD463

– Internally Ties ORG High

– 100 Compatible With all 16-bit

Implementations

– Eight Word Page Write Capability