S93WD462_98 Datasheet, PDF (1/14 Pages) Summit Microelectronics, Inc. – Precision Supply-Voltage Monitor and Reset Controller With a Watchdog Timer and 1k-bit Microwire Memory

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 V_CC = 1V
— 150ms Reset Pulse Width
— Internal 1.26V Reference with ±1% Accuracy
— ZERO External Components Required
• Watchdog Timer
— Nominal 1.6 Second Timeout 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 timeout 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 1,000,000
program/erase cycles and have data retention in ex-
cess of 100 years.
BLOCK DIAGRAM
VCC ₈
GND 5
CS 1
SK ₂
DI ₃
5KHz
Oscillator
RESET
PULSE
GENERATOR
1.26V
+
VTRIP
RESET
-
CONTROL
WATCHDOG
TIMER
MODE
DECODE
ADDRESS
DECODER
VCC
WRITE
CONTROL
6
RESET
7
RESET
DO 4
DATA I/O
MEMORY
ARRAY
1K-Bit
E2PROM
2029 ILL2.1
SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone [phone] • Fax [phone] • www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 1998
2029-01 4/14/98
Characteristics subject to change without notice
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