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MAX6821

Description
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
Categorysemiconductor    Analog mixed-signal IC   
File Size133KB,9 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX6821 Overview

1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5

MAX6821 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals5
Maximum operating temperature125 Cel
Minimum operating temperature-40 Cel
Maximum supply/operating voltage5.5 V
Minimum supply/operating voltage1.2 V
Rated supply voltage1.5 V
Processing package descriptionSOT-23, 5 PIN
stateACTIVE
CraftsmanshipBICMOS
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE, LOW PROFILE, SHRINK PITCH
surface mountYes
Terminal formGULL WING
Terminal spacing0.9500 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelAUTOMOTIVE
Number of channels1
Analog IC other typesPOWER SUPPLY SUPPORT CKT
19-1868; Rev 1; 1/01
Low-Voltage SOT23 µP Supervisors with
Manual Reset and Watchdog Timer
General Description
The MAX6821–MAX6825 are low-voltage microprocessor
(µP) supervisory circuits that combine voltage monitor-
ing, watchdog timer, and manual reset input functions in
a 5-pin SOT23 package. Microprocessor supervisory cir-
cuits significantly improve system reliability and accura-
cy compared to separate ICs or discrete components.
These devices assert a reset signal whenever the moni-
tored voltage drops below its preset threshold, keeping it
asserted for a minimum timeout period after V
CC
rises
above the threshold. In addition, a watchdog timer moni-
tors against code execution errors. A debounced manual
reset is also available. The MAX6821–MAX6825 monitor
voltages from +1.8V to +5.0V. These outputs are guaran-
teed to be in the correct state for V
CC
down to +1.0V.
Nine preprogrammed reset threshold voltages are
available (see
Threshold Suffix Guide).
The MAX6821,
MAX6822, and MAX6823 all have a manual reset input
and a watchdog timer. The MAX6821 has push-pull
RESET, the MAX6822 has open-drain
RESET,
and the
MAX6823 has push-pull
RESET.
The MAX6824 has a
watchdog timer and both push-pull
RESET
and push-
pull RESET. The MAX6825 has a manual reset input
and both push-pull
RESET
and push-pull RESET. The
Selector Guide
explains the functions offered in this
series of parts.
Features
o
Monitors +1.8V, +2.5V, +3.0V, +3.3V, +5.0V
Supplies
o
140ms (min) Reset Timeout Delay
o
1.6s Watchdog Timeout Period
(MAX6821/MAX6822/MAX6823/MAX6824)
o
Manual Reset Input
(MAX6821/MAX6822/MAX6823/MAX6825)
o
Three Reset Output Options
Push-Pull
RESET
Push-Pull RESET
Open-Drain
RESET
o
Guaranteed Reset Valid to V
CC
= +1.0V
o
Immune to Short Negative V
CC
Transients
o
No External Components
o
Small 5-Pin SOT23 Packages
MAX6821–MAX6825
Ordering Information
PART
*
MAX6821_UK-T
MAX6822_UK-T
MAX6823_UK-T
MAX6824_UK-T
MAX6825_UK-T
TEMP. RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
________________________Applications
Set-Top Boxes
Computers and
Controllers
Embedded Controllers
Intelligent Instruments
Automotive Systems
Critical µP Monitoring
Portable/Battery-
Powered Equipment
*Insert
the desired suffix letter (from the table below) into the blank
to complete the part number.
Threshold Suffix Guide
SUFFIX
L
RESET
THRESHOLD (V)
4.63
4.38
3.08
2.93
2.63
2.32
2.19
1.67
1.58
Pin Configurations
TOP VIEW
RESET(RESET)
1
5
V
CC
M
T
S
R
Z
Y
4
WDI
GND
2
MAX6821
MAX6822
MAX6823
MR
3
W
V
(RESET) MAX6821 ONLY
SOT23-5
Pin Configurations continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Note:
Bold indicates standard versions. Samples are typically
available for standard versions only. All parts require a 2.5k
minimum order increment. Contact factory for availability.
Selector Guide appears at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

MAX6821 Related Products

MAX6821 MAX6825 MAX6824 MAX6823 MAX6822
Description 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
Number of functions 1 1 1 1 1
Number of terminals 5 5 5 5 5
Maximum operating temperature 125 Cel 125 Cel 125 Cel 125 Cel 125 Cel
Minimum operating temperature -40 Cel -40 Cel -40 Cel -40 Cel -40 Cel
Maximum supply/operating voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum supply/operating voltage 1.2 V 1.2 V 1.2 V 1.2 V 1.2 V
Rated supply voltage 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V
Processing package description SOT-23, 5 PIN SOT-23, 5 PIN SOT-23, 5 PIN SOT-23, 5 PIN SOT-23, 5 PIN
state ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Craftsmanship BICMOS BICMOS BICMOS BICMOS BICMOS
packaging shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package Size SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
surface mount Yes Yes Yes Yes Yes
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal spacing 0.9500 mm 0.9500 mm 0.9500 mm 0.9500 mm 0.9500 mm
terminal coating TIN LEAD TIN LEAD TIN LEAD TIN LEAD TIN LEAD
Terminal location DUAL DUAL DUAL DUAL DUAL
Packaging Materials PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
Temperature level AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
Number of channels 1 1 1 1 1
Analog IC other types POWER SUPPLY SUPPORT CKT POWER SUPPLY SUPPORT CKT POWER SUPPLY SUPPORT CKT POWER SUPPLY SUPPORT CKT POWER SUPPLY SUPPORT CKT
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