Low Voltage, High Accuracy, Triple/Quad
Voltage Microprocessor Supervisory Circuit
Data Sheet
ADM6710
Rev. B Document Feedback
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FEATURES
Accurate monitoring of up to four power supply voltages
5 factory set threshold options: 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V
Adjustable input threshold voltage = 0.62 V (1.5% accuracy)
200 ms typical reset timeout
Open-drain
RESET
output (10 μA internal pull-up)
Reset output stage: active low, valid to IN
1
= 1 V or IN
2
= 1 V
Low power consumption (35 μA)
Power supply glitch immunity
Specified from −40°C to +125°C
6-lead SOT-23 package
APPLICATIONS
Telecommunications
Microprocessor systems
Desktop and notebook computers
Data storage equipment
Servers/workstations
FUNCTIONAL BLOCK DIAGRAM
200ms
TIMEOUT
UVLO
IN
2
, V
CC
0.62V REF
ADM6710
RESET
IN
1
IN
2
,
CC
IN
3
IN
4
06626-001
Figure 1.
GENERAL DESCRIPTION
The ADM6710 is a low voltage, high accuracy supervisory
circuit. The device monitors up to four system supply voltages.
The ADM6710 incorporates a variety of internally pretrimmed
undervoltage threshold options for monitoring 1.8 V, 2.5 V,
3.0 V, 3.3 V and 5.0 V supply voltages. The ADM6710Q offers
three adjustable thresholds for monitoring voltages down to
0.62 V. See the Ordering Guide section for a list and description
of all available options.
If a monitored power supply voltage falls below the minimum
voltage threshold, a single active low output asserts, triggering a
system reset. The output is open-drain with a weak internal
pull-up to the monitored IN
2
supply (or to V
CC
in the case of the
ADM6710Q) of typically 10 μA. After all voltages rise above the
selected threshold level, the reset signal remains low for the
reset timeout period (200 ms typical).
The ADM6710 output remains valid as long as IN
1
or IN
2
exceeds 1 V, whereas for the ADM6710Q, the output remains
valid as long as V
CC
exceeds 2 V.
Unused monitored inputs must not be allowed to float or to be
grounded, instead they must be connected to a supply voltage
greater than their specified threshold voltages.
The ADM6710 is available in a 6-lead SOT-23 package. The
device operates over the extended temperature range of −40°C
to +125°C.
