19-1623; Rev 0; 1/00
4-Pin SC70 Microprocessor Reset Circuits
with Manual Reset Input
General Description
The MAX6711/MAX6712/MAX6713 are microprocessor
(碌P) supervisory circuits used to monitor the power
supplies in 碌P and digital systems. They provide excel-
lent circuit reliability and low cost by eliminating exter-
nal components and adjustments when used with
+5.0V, +3.3V, +3.0V, or +2.5V-powered circuits. They
also provide a debounced manual reset input.
These circuits assert a reset signal whenever the V
CC
supply voltage declines below a preset threshold or
whenever manual reset is asserted. Reset remains
asserted for at least 140ms after V
CC
has risen above
the reset threshold or when manual reset is deasserted.
Reset thresholds suitable for operation with a variety of
supply voltages are available.
The MAX6713 has an open-drain output stage, while
the MAX6711/MAX6712 have push-pull outputs. The
MAX6713鈥檚 open-drain
RESET
output requires a pull-up
resistor that can be connected to a voltage higher than
V
CC
. The MAX6711/MAX6713 have an active-low reset
output, while the MAX6712 has an active-high reset out-
put. The reset comparator is designed to ignore fast
transients on V
CC
, and the outputs are guaranteed to
be in the correct logic state for V
CC
down to 1V.
Low supply current makes the MAX6711/MAX6712/
MAX6713 ideal for use in portable equipment. These
devices are available in a 4-pin SC70 package.
____________________________Features
o
Precision Monitoring of 2.5V, 3.0V, 3.3V, and 5.0V
Power-Supply Voltages
o
Fully Specified Over Temperature
o
Available in Three Output Configurations
Push-Pull
RESET
Output (MAX6711)
Push-Pull RESET Output (MAX6712)
Open-Drain
RESET
Output (MAX6713)
o
140ms min Power-On Reset Pulse Width
o
Manual Reset Input
o
12碌A Supply Current
o
Guaranteed Reset Valid to V
CC
= +1V
o
Power-Supply Transient Immunity
o
No External Components
o
4-Pin SC70 Package
MAX6711L/M/R/S/T/Z, MAX6712L/M/R/S/T/Z, MAX6713L/M/R/S/T/Z
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX6711_EXS-T
-40掳C to +125掳C
4 SC70-4
MAX6711_EXS-T10
-40掳C to +125掳C
4 SC70-4
MAX6712_EXS-T
-40掳C to +125掳C
4 SC70-4
MAX6712_EXS-T10
-40掳C to +125掳C
4 SC70-4
MAX6713_EXS-T
-40掳C to +125掳C
4 SC70-4
MAX6713_EXS-T10
-40掳C to +125掳C
4 SC70-4
Note:
These parts are offered in 2.5k or 10k reels and must be
ordered in 2.5k or 10k increments. Order MAX6711_EXS-T for
2.5k reels and MAX6711_EXS-T10 for 10k reels. Insert the
desired suffix letter from the Selector Guide into the blank to
complete the part number.
Selector Guide appears at end of data sheet.
Applications
Computers
Controllers
Intelligent Instruments
Critical 碌P and 碌C Power Monitoring
Portable/Battery-Powered Equipment
Automotive
Typical Operating Circuit
V
CC
V
CC
R
PULL-UP
*
V
CC
Pin Configuration
TOP VIEW
GND
1
4
V
CC
MAX6711
MAX6713
PUSHBUTTON
MR
SWITCH
GND
RESET
RESET
INPUT
碌P
MAX6711
MAX6712
MAX6713
RESET (RESET)
2
GND
3
MR
*MAX6713 ONLY
( ) ARE FOR MAX6712.
SC70-4
________________________________________________________________
Maxim Integrated Products
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For free samples and the latest literature: www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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