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FM812MUX Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # FM812MUX
Description  Microprocessor Reset Circuits
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FM812MUX Datasheet(HTML) 1 Page - Fairchild Semiconductor

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www.fairchildsemi.com
REV. 1.5.1 7/15/02
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.
Features
• Feature
• Precision Voltage Monitor for 3V, 3.3V or 5V Power
Supplies
• 6µA Supply Current
• 140ms Minimum Reset Pulse Width
• RESET Remains Valid with VCC as Low as 1.4V
• Active Low Manual Reset Input
• No External Components
• 4-Pin SOT-143 Package
Applications
• Critical Microprocessor Power Monitoring
• Portable Equipment
• Intelligent Instruments
• Computers & Printers
• Controllers
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.
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 VCC has risen above the designated reset threshold.
The FM811/FM812 is available in a 4-pin SOT-143.
Typical Applications
FM811
FM812
µP
VCC
VCC
RESET
RESET
INPUT
MR
(RESET)
( ) = FM812
VCC
FM811/812
Microprocessor Reset Circuits


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