MAX707MJA/883B Maxim Integrated Products, MAX707MJA/883B Datasheet

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MAX707MJA/883B

Manufacturer Part Number
MAX707MJA/883B
Description
Supervisory Circuits Single uPower Supervisor
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX707MJA/883B

Number Of Voltages Monitored
1
Monitored Voltage
4.65 V
Output Type
Active High, Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.2 V
Supply Current (typ)
500 uA
Maximum Power Dissipation
640 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Package / Case
CDIP N
Minimum Operating Temperature
- 55 C
Power Fail Detection
Yes
Undervoltage Threshold
4.5 V
Overvoltage Threshold
4.75 V
Power-up Reset Delay (typ)
280 ms
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX707MJA/883B
Manufacturer:
NS
Quantity:
1
Part Number:
MAX707MJA/883B
Manufacturer:
ST
Quantity:
650
19-4334; Rev. 8; 3/10
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.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim 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
V
RESET
I/O LINE
NMI
INTERRUPT
CC
µP
®
o Available in Tiny µMAX Package
o Guaranteed RESET Valid at V
o Precision Supply-Voltage Monitor
o 200ms Reset Pulse Width
o Debounced TTL/CMOS-Compatible
o Independent Watchdog Timer—1.6s Timeout
o Active-High Reset Output
o 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
4.65V in MAX705/MAX707/MAX813L
4.40V in MAX706/MAX708
( ) ARE FOR MAX813L ONLY.
Pin Configurations continued at end of data sheet.
TOP VIEW
GND
GND
V
V
MR
PFI
MR
PFI
CC
CC
A
TEMP RANGE
1
2
3
4
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
1
2
3
4
= +25°C.
MAX813L
MAX705
MAX706
DIP/SO
MAX707
MAX708
DIP/SO
CC
8
7
6
5
8
7
6
5
= 1V
WDO
RESET (RESET)
WDI
PFO
RESET
RESET
N.C.
PFO
8 Plastic DIP
8 SO
8 µMAX
Dice*
PIN-PACKAGE
1

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MAX707MJA/883B Summary of contents

Page 1

... MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX packages. _______________________Applications Computers Controllers Intelligent Instruments Automotive Systems Critical µP Power Monitoring µMAX is a registered trademark of Maxim Integrated Products, Inc. __________Typical Operating Circuit UNREGULATED DC MAX667 +5V DC LINEAR REGULATOR V RESET CC ...

Page 2

... Low-Cost, µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND -0.3V to 6.0V CC All Other Inputs (Note -0. Input Current 20mA CC GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Output Current (all outputs 20mA Continuous Power Dissipation (T = +70°C) A Plastic DIP (derate 9.09mW/°C above +70° 727mW SO (derate 5.88mW/° ...

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 Current PFO Output Voltage Note 2: Applies to both RESET in the MAX705–MAX708 and RESET in the MAX707/MAX708/MAX813L. ...

Page 4

... Low-Cost, µP Supervisory Circuits __________________________________________Typical Operating Characteristics MAX705/MAX707 RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE + +25° + 2kΩ RESET RESET RESET 330pF GND 0V 500ms/div POWER-FAIL COMPARATOR ASSERTION RESPONSE TIME +5V +5V PFO PFI 1kΩ PFO 30pF 0V +1.25V +1.30V V = +5V CC PFI T = +25°C A +1.20V 400ns/div MAX707/MAX708/MAX813L RESET OUTPUT VOLTAGE vs ...

Page 5

... Low-Cost, µP Supervisory Circuits ______________________________________________________________Pin Description PIN MAX705/MAX706 MAX707/MAX708 DIP/SO DIP/SO µMAX µMAX — — — — 6 — — — — — _______________________________________________________________________________________ MAX813L NAME DIP/SO µMAX Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input has an inter- ...

Page 6

... Low-Cost, µP Supervisory Circuits WATCHDOG 6 WATCHDOG TRANSITION WDI TIMER DETECTOR V CC TIMEBASE FOR RESET AND 250µA WATCHDOG 1 MR RESET 2 GENERATOR V CC MAX705 4.65V* MAX706 4 MAX813L PFI 1.25V 3 GND * 4.40V FOR MAX7O6 ARE FOR MAX813L ONLY. Figure 1. MAX705/MAX706/MAX813L Block Diagram _______________Detailed Description A microprocessor’ ...

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 +5V WDI 0V +5V WDO 0V +5V RESET 0V RESET EXTERNALLY TRIGGERED BY MR ...

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 = , V TRIP R1 R2 Figure 7. Monitoring a Negative Voltage 8 _______________________________________________________________________________________ 1MΩ 1% 130kΩ Figure 6. Monitoring Both +5V and +12V 100kΩ ...

Page 9

... Low-Cost, µP Supervisory Circuits __Ordering Information (continued) PART TEMP RANGE MAX705EPA -40°C to +85°C MAX705ESA -40°C to +85°C MAX705EUA -40°C to +85°C MAX705MJA -55°C to +125°C MAX706CPA 0°C to +70°C MAX706CSA 0°C to +70°C MAX706CUA 0°C to +70°C MAX706C/D 0°C to +70°C MAX706EPA -40° ...

Page 10

... Low-Cost, µP Supervisory Circuits ($) 1000-up Price † Pins (typ) max µA Mode Backup SUPPLY I (typ) max mA Mode Operating SUPPLY I Output Battery-On Output Low-Line Input Manual-Reset Comparator Power-Fail Protect Write E C – — – (Ω) Max Resistance On OUT BATT -to-V V (Ω) Max ...

Page 11

... Low-Cost, µP Supervisory Circuits For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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