Microprocessor Supervisory
Circuit in 4-Lead SC70
ADM6711/ADM6713
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
Specified over temperature
Low power consumption (12 μA)
Precision monitoring of 2.5 V, 3 V, 3.3 V,
and 5 V power supply voltages
Reset timeout period of 140 ms (minimum)
Manual reset input
ADM6711
V
RESET
CC
GENERATOR
240ms
RESET
GND
V
REF
MR
DEBOUNCE
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
Figure 1.
ADM6713
V
CC
RESET
GENERATOR
240ms
RESET
GND
V
REF
APPLICATIONS
Microprocessor systems
Computers
MR
DEBOUNCE
Controllers
Intelligent instruments
Automotive systems
Figure 2.
GENERAL DESCRIPTION
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
voltage 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.
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.
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
microprocessor starts up.
V
V
CC
*R
PULL-UP
CC
MICROPROCESSOR
SYSTEM
ADM6711/
ADM6713
MR
RESET
RESET
GND
GND
The ADM6711 has a push-pull output, so no additional
external components are needed. The ADM6713 open-drain
output requires an external pull-up resistor that can be
connected to a voltage higher than VCC, if desired.
*ADM6713 ONLY
Figure 3. Typical Operating Circuit
Rev. A
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