Summit manual S93WD462/S93WD463, MICROELECTRONICS, Inc, Summit

SUMMIT

MICROELECTRONICS, Inc. S93WD462/S93WD463

Precision Supply-Voltage Monitor and Reset Controller

With a Watchdog Timer and 1k-bit Microwire Memory

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

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 capabil- ity. The devices are designed for a minimum 100,000 program/erase cycles and have data retention in ex- cess of 100 years.

BLOCK DIAGRAM

	VCC
	8
			5kHz	RESET				6	RESET#
				PULSE
		OSCILLATOR
				GENERATOR
		+	VTRIP	RESET
		–		CONTROL
								7	RESET
	1.26V		WATCHDOG
CS			TIMER
	1
SK	2	MODE	ADDRESS		WRITE
DI	3	DECODE	DECODER		CONTROL
		DATA I/O		E2PROM
DO	4			MEMORY
				ARRAY
	5
	GND					2029 T BD 2.0
© SUMMIT MICROELECTRONICS, Inc. 2001		• 300 Orchard City Drive, Suite 131		• Campbell, CA 95008		• Telephone 408-378 -6461	•	Fax 408-378-6586 •		www.summitmicro.com

Characteristics subject to change without notice 2029 2.2 1/23/01

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