Microprocessor Supervisory
Circuit in 4-Lead SC70
ADM6711/ADM6713
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Specified Over Temperature
Low Power Consumption (12 A)
Precision Monitoring of 2.5 V, 3 V, 3.3 V, and 5 V Power
Supply Voltages
Reset Timeout Period of 140 ms (Min)
Manual Reset Input
ADM6711
V
CC
RESET
GENERATOR
240 ms
RESET
V
REF
Output Stages
Push-Pull RESET Output (ADM6711)
Open-Drain RESET Output (ADM6713)
Reset Assertion Down to 1 V VCC
Power Supply Glitch Immunity
4-Lead SC70 Package
DEBOUNCE
MR
GND
ADM6713
APPLICATIONS
Microprocessor Systems
Computers
V
CC
RESET
GENERATOR
240 ms
RESET
V
REF
Controllers
Intelligent Instruments
Automotive Systems
Portable Instruments
DEBOUNCE
MR
GND
GENERAL DESCRIPTION
The parts are highly reliable with accurate voltage references
and immunity to fast, negative-going transients on VCC. Low
current consumption and space-efficient 4-lead SC70 packaging
make the ADM6711/ADM6713 ideal for use in low power
portable applications.
The ADM6711/ADM6713 are reset generator circuits suitable
for use in microprocessor based systems. They provide a reset
signal on power-up, power-down, and whenever the supply volt-
age falls below a preset threshold. In addition, both parts have a
debounced manual reset input so that a reset signal can also be
initiated with an external switch or logic signal.
V
CC
With six different reset threshold options available ranging from
2.32 V to 4.63 V, the ADM6711/ADM6713 are suitable for
monitoring 2.5 V, 3 V, 3.3 V, and 5 V supplies. A reset timeout
of at least 140 ms occurs when VCC rises above the threshold.
This gives the supply voltage time to stabilize before the micro-
processor starts up.
V
V
CC
CC
*R
PULL-UP
ADM6711/
ADM6713
P
SYSTEM
RESET
RESET
MR
GND
GND
The ADM6711 has a push-pull output, so no additional external
components are needed. The ADM6713’s open-drain output
requires an external pull-up resistor, which can be connected to a
voltage higher than VCC, if desired.
*ADM6713 ONLY
Figure 1. Typical Operating Circuit
REV. 0
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