MAX813LEPA Maxim Integrated Products, MAX813LEPA Datasheet

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MAX813LEPA

Manufacturer Part Number
MAX813LEPA
Description
Low-cost, microprocessor supervisory circuit. Active-low manual-reset input. Active-high reset output. Precision supply-voltage monitor 4.65V.
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX813LEPA

Case
DIP

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19-4334; Rev. 7; 12/05
The MAX705-MAX708/MAX813L microprocessor (µP)
supervisory circuits reduce the complexity and number
of components required to monitor power-supply and
battery functions in µP systems. These devices signifi-
cantly improve system reliability and accuracy com-
pared to separate ICs or discrete components.
The MAX705/MAX706/MAX813L provide four functions:
1) A reset output during power-up, power-down, and
2) An independent watchdog output that goes low if
3) A 1.25V threshold detector for power-fail warning,
4) An active-low manual-reset input.
The MAX707/MAX708 are the same as the MAX705/
MAX706, except an active-high reset is substituted for
the watchdog timer. The MAX813L is the same as the
MAX705, except RESET is provided instead of RESET.
Two supply-voltage monitor levels are available: The
MAX705/MAX707/MAX813L generate a reset pulse when
the supply voltage drops below 4.65V, while the
MAX706/MAX708 generate a reset pulse below 4.40V.
All four parts are available in 8-pin DIP, SO and µMAX
packages.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
__________Typical Operating Circuit
_______________General Description
_______________________Applications
brownout conditions.
the watchdog input has not been toggled within 1.6
seconds.
low-battery detection, or for monitoring a power sup-
ply other than +5V.
UNREGULATED DC
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
PUSHBUTTON
SWITCH
+5V DC LINEAR
________________________________________________________________ Maxim Integrated Products
REGULATOR
MAX667
V
PFI
MR
CC
MAX813L
MAX705
MAX706
RESET
Low-Cost, µP Supervisory Circuits
WDO
PFO
PFI
RESET
I/O LINE
INTERRUPT
V
NMI
CC
P
♦ µMAX Package: Smallest 8-Pin SO
♦ Guaranteed RESET Valid at V
♦ Precision Supply-Voltage Monitor
♦ 200ms Reset Pulse Width
♦ Debounced TTL/CMOS-Compatible
♦ Independent Watchdog Timer—1.6sec Timeout
♦ Active-High Reset Output
♦ Voltage Monitor for Power-Fail or Low-Battery
Ordering Information continued at end of data sheet.
* Dice are specified at T
**Contact factory for availability and processing to MIL-STD-883.
Devices in PDIP, SO and µMAX packages are available in both
leaded and lead-free packaging. Specify lead free by adding
the + symbol at the end of the part number when ordering.
Lead free not available for CERDIP package.
_________________Pin Configurations
______________Ordering Information
MAX705CPA
MAX705CSA
MAX705CUA
MAX705C/D
___________________________Features
Manual-Reset Input
(MAX705/MAX706)
(MAX707/MAX708/MAX813L)
Warning
PART
( ) ARE FOR MAX813L ONLY.
Pin Configurations continued at end of data sheet.
4.65V in MAX705/MAX707/MAX813L
4.40V in MAX706/MAX708
TOP VIEW
GND
GND
V
V
MR
PFI
MR
PFI
CC
CC
1
2
3
4
1
2
3
4
A
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
= +25°C.
MAX813L
MAX705
MAX706
DIP/SO
MAX707
MAX708
DIP/SO
CC
8
7
6
5
8
7
6
5
WDO
RESET (RESET)
WDI
PFO
RESET
RESET
N.C.
PFO
= 1V
8 Plastic DIP
8 SO
8 µMAX
Dice*
PIN-PACKAGE
1

Related parts for MAX813LEPA

MAX813LEPA Summary of contents

Page 1

... MAX705 MAX706 MR MAX813L PUSHBUTTON SWITCH ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ___________________________Features ♦ µMAX Package: Smallest 8-Pin SO ♦ Guaranteed RESET Valid at V ♦ Precision Supply-Voltage Monitor 4 ...

Page 2

Low-Cost, µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND ...

Page 3

Low-Cost, µP Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.5V for MAX705/MAX707/MAX813L PARAMETER MR Pull-Up Current MR Pulse Width Low MR Input Threshold High MR to Reset Out Delay (Note 2) PFI Input Threshold PFI Input ...

Page 4

Low-Cost, µP Supervisory Circuits __________________________________________Typical Operating Characteristics MAX705/MAX707 RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE + +25° + RESET RESET RESET 330pF GND 0V 500ms/div POWER-FAIL COMPARATOR ASSERTION RESPONSE TIME ...

Page 5

Low-Cost, µP Supervisory Circuits ______________________________________________________________Pin Description PIN MAX705/MAX706 MAX707/MAX708 DIP/SO µMAX DIP/SO µMAX ...

Page 6

Low-Cost, µP Supervisory Circuits WATCHDOG 6 WATCHDOG WDI TRANSITION TIMER DETECTOR V CC TIMEBASE FOR RESET AND 250 A WATCHDOG 1 MR RESET 2 GENERATOR V CC MAX705 4.65V* MAX706 4 MAX813L PFI 1.25V 3 GND * 4.40V FOR MAX7O6. ...

Page 7

Low-Cost, µP Supervisory Circuits Power-Fail Comparator The power-fail comparator can be used for various pur- poses because its output and noninverting input are not internally connected. The inverting input is internal- ly connected to a 1.25V reference ...

Page 8

Low-Cost, µP Supervisory Circuits MAX70_ RESET Figure 5. RESET Valid to Ground Circuit + MAX70_ PFO PFI R2 RESET GND V- + +5V PFO TRIP 5 1.25 1.25 V TRIP , ...

Page 9

... MAX813LCPA 0°C to +70°C MAX813LCSA 0°C to +70°C MAX813LCUA 0°C to +70°C MAX813LC/D 0°C to +70°C MAX813LEPA -40°C to +85°C MAX813LESA -40°C to +85°C MAX813LEUA -40°C to +85°C MAX813LMJA -55°C to +125°C * Dice are specified +25°C. ...

Page 10

Low-Cost, µP Supervisory Circuits (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ______________________________________________________________________________________ C 0.101mm 0.004 in ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2005 Maxim Integrated Products Low-Cost, µ ...

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