MAX707C/D Maxim Integrated, MAX707C/D Datasheet

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MAX707C/D

Manufacturer Part Number
MAX707C/D
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX705, MAX706, MAX707, MAX708, MAX813, MAX813Lr
Datasheet

Specifications of MAX707C/D

Number Of Voltages Monitored
1
Monitored Voltage
4.65 V
Undervoltage Threshold
4.5 V
Overvoltage Threshold
4.75 V
Output Type
Active High, Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
280 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 70 C
Package / Case
Die
Chip Enable Signals
No
Minimum Operating Temperature
0 C
Power Fail Detection
Yes
Supply Current (typ)
350 uA
Supply Voltage - Min
1 V
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.
__________Typical Operating Circuit
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
_______________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
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
MAX705–MAX708/MAX813L
®
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
MAX705CPA
MAX705CSA
MAX705CUA
MAX705C/D
______________Ordering Information
___________________________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
19-4334; Rev. 9; 1/13

Related parts for MAX707C/D

MAX707C/D 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

... MIN MAX MIN TYP MAX 1.0 1.1 1.2 150 150 50 50 4.50 4.65 4.75 4.25 4.40 4.50 40 140 200 50µA = 100µA SINK = 800µ 1 1.1V 0 1.2V 0 800µ 1 3.2mA 1.00 1.60 2. -150 - 1.5 CC UNITS 5.5 5.5 V 5.5 350 500 µA 350 500 V mV 280 ms 0.4 V 0.3 0.3 0 0.8 V 150 µA V 0.4 Maxim Integrated ...

Page 3

... 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. Maxim Integrated MAX705–MAX708/MAX813L Low-Cost, µP Supervisory Circuits = 4.5V to 5.5V for MAX706/MAX708 SYMBOL CONDITIONS ...

Page 4

... +25° RESET 10kΩ 0V RESET RESET 10kΩ GND 330pF +5V RESET 330pF 0V 400ns/div MAX813L RESET RESPONSE TIME + RESET 330pF 10kΩ GND +4V 2µs/div +25°C A 1kΩ +3V +1.30V RESET 330pF RESET Maxim Integrated ...

Page 5

... Maxim Integrated MAX705–MAX708/MAX813L Low-Cost, µP Supervisory Circuits MAX813L NAME DIP/SO µMAX GND 4 6 PFI PFO WDI — ...

Page 6

... MR can be used to force a watch- dog timeout to generate a reset pulse in the MAX705/ MAX706/MAX813L. Simply connect WDO to MR 250µA 1 RESET 2 GENERATOR MAX707 4.65V* MAX708 4 1.25V GND RESET 7 RESET 5 PFO drops below CC falls below the Manual Reset Maxim Integrated ...

Page 7

... MR EXTERNALLY DRIVEN LOW Figure 4. MAX705/MAX706 RESET, MR, and WDO Timing with WDI Three-Stated. The MAX707/MAX708/MAX813L RESET output is the inverse of RESET shown. Maxim Integrated MAX705–MAX708/MAX813L Low-Cost, µP Supervisory Circuits To build an early-warning circuit for power failure, con- nect the PFI pin to a voltage divider (see Typical Operating Circuit ) ...

Page 8

... CC 1MΩ 1% MAX70_ MR 130kΩ PFI PFO 1% GND PARAMETER MIN TYP MAX +12V Reset 10.67 10.87 11.50 Threshold at +25°C BUFFERED RESET TO OTHER SYSTEM COMPONENTS V CC MAX70_ 4.7kΩ RESET RESET GND Interfacing to µPs with Bidirectional Reset Pins TO µP UNIT µP GND Maxim Integrated ...

Page 9

... MAX706EUA -40°C to +85°C MAX706MJA -55°C to +125°C MAX707CPA 0°C to +70°C MAX707CSA 0°C to +70°C MAX707CUA 0°C to +70°C MAX707C/D 0°C to +70°C MAX707EPA -40°C to +85°C MAX707ESA -40°C to +85°C MAX707EUA -40°C to +85°C MAX707MJA -55°C to +125°C MAX708CPA 0° ...

Page 10

... Max Resistance On OUT CC -to-V V Switch Backup-Battery Output Watchdog Separate Available if (sec), Period Timeout Watchdog Nominal Valid – — — — — – Reset Active-High Reset Active-Low (ms) Width Pulse Reset Minimum (V) Threshold Reset Nominal Number Part 10 Maxim Integrated ...

Page 11

... RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 8 µMAX 8 Plastic DIP 8 SO Maxim Integrated MAX705–MAX708/MAX813L Low-Cost, µP Supervisory Circuits PACKAGE CODE U8-1 P8-1 ...

Page 12

... Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed ...

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