19-1623; Rev 0; 1/00
4-Pin SC70 Microprocessor Reset Circuits
with Manual Reset Input
General Description
____________________________Features
ꢀ Precision Monitoring of 2.5V, 3.0V, 3.3V, and 5.0V
The MAX6711/MAX6712/MAX6713 are microprocessor
(µP) supervisory circuits used to monitor the power
supplies in µP 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.
Power-Supply Voltages
ꢀ Fully Specified Over Temperature
ꢀ Available in Three Output Configurations
Push-Pull RESET Output (MAX6711)
Push-Pull RESET Output (MAX6712)
Open-Drain RESET Output (MAX6713)
ꢀ 140ms min Power-On Reset Pulse Width
ꢀ 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
has risen above
CC
ꢀ 12µA Supply Current
the reset threshold or when manual reset is deasserted.
Reset thresholds suitable for operation with a variety of
supply voltages are available.
ꢀ Guaranteed Reset Valid to VCC = +1V
ꢀ Power-Supply Transient Immunity
ꢀ No External Components
The MAX6713 has an open-drain output stage, while
the MAX6711/MAX6712 have push-pull outputs. The
MAX6713’s open-drain RESET output requires a pull-up
resistor that can be connected to a voltage higher than
ꢀ 4-Pin SC70 Package
V
CC
. The MAX6711/MAX6713 have an active-low reset
Ordering Information
output, while the MAX6712 has an active-high reset out-
put. The reset comparator is designed to ignore fast
PART
TEMP. RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
transients on V , and the outputs are guaranteed to
CC
MAX6711_EXS-T
MAX6711_EXS-T10
MAX6712_EXS-T
MAX6712_EXS-T10
MAX6713_EXS-T
MAX6713_EXS-T10
be in the correct logic state for V
down to 1V.
CC
Low supply current makes the MAX6711/MAX6712/
MAX6713 ideal for use in portable equipment. These
devices are available in a 4-pin SC70 package.
Applications
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.
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
Selector Guide appears at end of data sheet.
Typical Operating Circuit
Pin Configuration
TOP VIEW
V
CC
V
V
CC
CC
1
2
V
CC
GND
4
R
*
PULL-UP
MAX6711
MAX6713
P
MAX6711
MAX6712
MAX6713
RESET
INPUT
RESET
PUSHBUTTON
SWITCH
MR
RESET (RESET)
GND
GND
3
MR
SC70-4
( ) ARE FOR MAX6712.
*MAX6713 ONLY
________________________________________________________________ Maxim Integrated Products
1
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For small orders, phone 1-800-835-8769.