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MIC2753-LBM5 Datasheet(PDF) 1 Page - Micrel Semiconductor

Part # MIC2753-LBM5
Description  Power Supply Supervisors Preliminary Information
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2753-LBM5 Datasheet(HTML) 1 Page - Micrel Semiconductor

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June 1999
1
MIC2753/2754
MIC2753/2754
Micrel
MIC2753/2754
Power Supply Supervisors
Preliminary Information
General Description
The MIC2753 and MIC2754 are ultraminiature, full-featured,
power supply supervisors featuring active-high and active-
low reset outputs, respectively.
The MIC2753/4 includes an undervoltage detector with a
power-on reset generator and reset output, an overvoltage
detector with a separate output for activating crowbar circuits,
and a debounced manual reset input. Typical supply current
is a low 30
µA.
These devices provide a 140ms minimum reset output at
power-on and assert their reset outputs any time the input
voltage deviates beyond preset overvoltage or undervoltage
thresholds. Reset outputs remain asserted for 140ms (mini-
mum) after the input returns to normal or after releasing the
manual reset. When an overvoltage condition is detected, the
overvoltage output is immediately activated. Hysteresis on
both thresholds prevents erratic operation due to noise.
Typical Application
Microcontroller
Manual
Reset
MIC2754
VCC
HV
MR
RST
VCC
VIN
RST IN
GND
GND
Fuse
SCR
Crowbar
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Features
• Undervoltage and overvoltage monitor
• Separate overvoltage flag output
• Generates 140ms (minimum) power-on reset pulse
• Debounced manual reset input
• Choice of active-high (MIC2753) or
active-low (MIC2754) reset outputs
• Low 30
µA typical supply current
• No external components needed
• IttyBitty™ SOT-23-5 package
Applications
• Computer systems
• Embedded controllers
• Power supplies
• Telecommunications systems


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