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S93WD462 Datasheet, PDF (1/14 Pages) Summit Microelectronics, Inc. – Precision Supply-Voltage Monitor and Reset Controller With a Watchdog Timer and 1k-bit Microwire Memory | |||
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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
â RESET and RESET Outputs
â Guaranteed RESET Assertion to VCC = 1V
â 150ms Reset Pulse Width
â Internal 1.26V Reference with ±1% Accuracy
â ZERO External Components Required
⢠Watchdog Timer
â Nominal 1.6 Second Time-out Period
â Reset by Any Transition of CS
⢠Memory
â 1K-bit Microwire Memory
â S93WD462
â Internally Ties ORG Low
â 100% Compatible With all 8-bit
Implementations
â Sixteen Byte Page Write Capability
â S93WD463
â Internally Ties ORG High
â 100% Compatible With all 16-bit
Implementations
â 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
OSCILLATOR
RESET
PULSE
GENERATOR
6 RESET#
CS 1
1.26V
+
VTRIP
â
RESET
CONTROL
WATCHDOG
TIMER
7 RESET
SK 2
DI 3
MODE
DECODE
ADDRESS
DECODER
WRITE
CONTROL
DO 4
DATA I/O
E2PROM
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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