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ASM812MEUSF-T

Description
Power Supply Support Circuit, Fixed, 1 Channel, +4.38VV, PDSO4, ROHS COMPLIANT, PLASTIC, SOT-143, 4 PIN
CategoryPower/power management    The power supply circuit   
File Size429KB,11 Pages
ManufacturerALSC [Alliance Semiconductor Corporation]
Environmental Compliance
Download Datasheet Parametric View All

ASM812MEUSF-T Overview

Power Supply Support Circuit, Fixed, 1 Channel, +4.38VV, PDSO4, ROHS COMPLIANT, PLASTIC, SOT-143, 4 PIN

ASM812MEUSF-T Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerALSC [Alliance Semiconductor Corporation]
Parts packaging codeSOT-143
package instructionLSOP, TO-253
Contacts4
Reach Compliance Codeunknown
ECCN codeEAR99
Other featuresRESET THRESHOLD VOLTAGE IS 4.38 V; MANUAL RESET INPUT
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G4
length2.92 mm
Number of channels1
Number of functions1
Number of terminals4
Maximum operating temperature105 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeLSOP
Encapsulate equivalent codeTO-253
Package shapeRECTANGULAR
Package formSMALL OUTLINE, LOW PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply5 V
Certification statusNot Qualified
Maximum seat height1.22 mm
Maximum supply current (Isup)0.025 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)1.2 V
Nominal supply voltage (Vsup)5 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal formGULL WING
Terminal pitch1.92 mm
Terminal locationDUAL
Threshold voltage nominal+4.38V
Maximum time at peak reflow temperatureNOT SPECIFIED
width1.3 mm
April 2005
rev 1.5
ASM811, ASM812
4-Pin µP Voltage Supervisor with Manual Reset
Six voltage thresholds are available to support 3V to 5V
systems:
General Description
The ASM811/ASM812 are cost effective low power supervisors
designed to monitor voltage levels of 3.0V, 3.3V and 5.0V
power
supplies
in
low-power
microprocessor
(µP),
microcontroller (µC) and digital systems. They provide excellent
reliability by eliminating external components and adjustments.
A reset signal is issued if the power supply voltage drops below
a preset reset threshold and is asserted for at least 140ms after
the supply has risen above the reset threshold. The ASM811
has an active-low output RESET that is guaranteed to be in the
correct state for V
CC
down to 1.1V. The ASM812 has an active-
high RESET output. The reset comparator is designed to ignore
fast transients on V
CC
. A debounced manual reset input allows
the user to manually reset the systems to bring them out of
locked state.
Low power consumption makes the ASM811/ASM812 ideal for
use in portable and battery operated equipment. The ASM811/
ASM812 are available in a compact 4-pin SOT-143 package
and thus use minimal board space.
RESET THRESHOLD
Suffix
L
M
J
T
S
R
Voltage (V)
4.63
4.38
4.00
3.08
2.93
2.63
Features
New 4.0V threshold option
6µA supply current
Monitor 5V, 3.3V and 3V supplies
Manual reset input
140ms min. reset pulse width
Guaranteed over temperature
Active-low reset valid with 1.1V supply (ASM811)
Small 4-pin SOT-143 package
No external components
Power-supply transient-immune design
Applications
Computers and Controllers
Embedded controllers
Portable/Battery operated systems
Intelligent instruments
Wireless communication systems
PDAs and handheld equipments
Automotive systems
Safety Systems
Typical Operating Circuit
V
CC
V
CC
ASM811
(ASM812)
MR RESET
(RESET)
GND
V
CC
µP
RESET (RESET)
Input
GND
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
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