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FM811SUX Datasheet

  • FM811SUX

  • Microprocessor Reset Circuits

  • 45.08KB

  • 6页

  • FAIRCHILD

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www.fairchildsemi.com
FM811/812
Microprocessor Reset Circuits
Features
鈥?Feature
鈥?Precision Voltage Monitor for 3V, 3.3V or 5V Power
Supplies
鈥?6碌A Supply Current
鈥?140ms Minimum Reset Pulse Width
鈥?RESET Remains Valid with V
CC
as Low as 1.4V
鈥?Active Low Manual Reset Input
鈥?No External Components
鈥?4-Pin SOT-143 Package
Description
The FM811/FM812 is a low cost microprocessor supervisory
circuit that asserts a reset if the power supply drops below a
designated threshold or the manual reset pin is forced low.
Several different reset thresholds are available to
accommodate systems operating at 3V, 3.3V or 5V.
Preliminary Information
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Critical Microprocessor Power Monitoring
Portable Equipment
Intelligent Instruments
Computers & Printers
Controllers
The FM811 has an active low RESET output, while the
FM812 offers an active high RESET output. The reset output
is guaranteed to remain asserted for a minimum of 140ms
after V
CC
has risen above the designated reset threshold.
The FM811/FM812 is available in a 4-pin SOT-143.
Typical Applications
V
CC
V
CC
V
CC
FM811
FM812
RESET
(RESET)
碌P
RESET
INPUT
MR
( ) = FM812
PRELIMINARY INFORMATION
describes products that are in the design stage. Specifications may change
in any manner whatever without notice. Contact Fairchild Semiconductor for current information.
REV. 1.5.1 7/15/02

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