lx6433 Microsemi Corporation, lx6433 Datasheet

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lx6433

Manufacturer Part Number
lx6433
Description
Precision Voltage Monitor
Manufacturer
Microsemi Corporation
Datasheet
Copyright © 2003
Rev. 1.1, 2009-02-11
monitor programmed to signal a low
supply line condition.
connected to the “monitored” supply
line, when VMON drops below the
threshold of 1.085V, RESET line
goes low. When power is restored
and
threshold voltage, RESET remains
low for an additional 100ms to ensure
system reset is fully applied.
ignores temporary dips in the VMON
line lasting for less than 10µS to
avoid false triggering.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
The LX6433 is a precise voltage
Digital filtering inside the LX6433
VMON
TM
T
0 to 85
3.3 to 5V
A
(°C)
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX6433CSE-TR)
moves
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
above
Voltage (VIN)
VMON is
D E S C R I P T I O N
3 to 6V
Supply
the
LX6433CSE
P A C K A G E O R D E R I N F O R M A T I O N
VIN
GND
Figure 1 – LX6433 Typical Application Circuit
range (VIN) of 3V to 6V. The RESET
line is capable of sinking an output
load current of 1mA.
protected from short circuit to VIN or
Ground without damage.
1.085V to 1.125V window over
temperature.
maintained with ultra low IQ of 20µA.
a small form factor similar to industry
standard device types in this category.
This package is RoHS compliant
allowing Pb free PCB assembly.
The monitor operates over a supply
Tight threshold detection allows for a
The 5 pin SOT-23 package provides
P R O D U C T H I G H L I G H T
RESET
VMON
Threshold Voltage
Analog Mixed Signal Group
1.105V +/-1.8%
Fault Detection
®
Microsemi
System efficiency is
1.2V Supply
(Optional)
R Pull-up
This line is
SE
Precision Voltage Monitor
RoHS Compliant / Pb-free
P
RODUCTION
LX6433CSE
Plastic SOT-23
5-PIN (Pb Free)
Microprocessor / ASIC
Reset
A P P L I C A T I O N S / B E N E F I T S
Ground
VCC
Precise Threshold Detection
1.105V ±0.02V
3V to 6.0V Operating Range
Active Low RESET, Sink
Current > 1mA
RESET Pulse Duration
Controlled, typical 100mS
Quiescent Current < 40μA
Wide Temperature: 0-85°C
No External Components
Required
SOT-23, 5-Pin Package, RoHS
Compliant (Pb-Free)
Similar Devices: FM803,
NCP803 and LM3724
Portable Microprocessor Core
Voltage Supply Monitor
Supply Monitoring: 1.2V, 2.5V,
3.3V, 5V or any other level.
D
K E Y F E A T U R E S
ATA
S
Device Marking
2975
HEET
LX6433
Page 1

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lx6433 Summary of contents

Page 1

... T (°C) A Voltage (VIN Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX6433CSE-TR) Copyright © 2003 Rev. 1.1, 2009-02-11 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Precision Voltage Monitor The monitor operates over a supply range (VIN ...

Page 2

... OL SINK VMON > 1.2V LKG RESET Time from VMON falling below threshold to T DELAY RESET going low, VMON overdrive of 50mV. Microsemi Analog Mixed Signal Group LX6433 RODUCTION ATA HEET GND 1 5 N.C. 2 RESET 3 4 ...

Page 3

... OUTPUT RESET SET Negative Edge Detector Figure 2 – Simplified Block Diagram 100ms (typ T10 T11 T12 T4 Figure 3 – Timing Diagram Microsemi Analog Mixed Signal Group LX6433 D S RODUCTION ATA HEET RESET Output Divide Clock VIN * * * ** VMON 100ms (typ ...

Page 4

... TM The LX6433 operates as a power supply monitor with a threshold window of 1.085V to 1.125V (±1.8%) that can be programmable using external resistors. VMON pin is the input to the internal comparator and VIN is the power source for the IC. The RESET pin is an open drain, with active low logic. An external pull- up resistor can be used if the device (ASIC) driven does not provide this feature ...

Page 5

... RODUCTION Figure 5 Reset Delay after V “GOOD” MONITOR 10uS 10us VIN /RESET Microsemi Analog Mixed Signal Group LX6433 D S ATA HEET VIN MONITOR /RESET Falls MONITOR (VMONITOR = 0V) Figure 7 Start-up for VIN ...

Page 6

... Copyright © 2003 Rev. 1.1, 2009-02-11 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Precision Voltage Monitor P RODUCTION Microsemi Analog Mixed Signal Group LX6433 D S ATA HEET Page 6 ...

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