MAX706SCUA+ Maxim Integrated Products, MAX706SCUA+ Datasheet

IC SUPERVISOR MPU 8-UMAX

MAX706SCUA+

Manufacturer Part Number
MAX706SCUA+
Description
IC SUPERVISOR MPU 8-UMAX
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheets
1.MAX544BCSA.pdf (12 pages)
2.MAX708SCSA.pdf (15 pages)

Specifications of MAX706SCUA+

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
2.93V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Monitored Voltage
2.93 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
350 uA
Maximum Power Dissipation
362 mW
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Power Fail Detection
Yes
Undervoltage Threshold
2.85 V
Overvoltage Threshold
3 V
Power-up Reset Delay (typ)
280 ms
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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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MAX706SCUA+ 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 ...

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° + 2kΩ 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 DIP/SO µMAX µMAX — — — — 6 ...

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. ( ...

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 ...

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 ...

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 ...

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 ...

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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