Datasheet

MAX16060/MAX16061/MAX16062
1% Accurate, Quad-/Hex-/Octal-Voltage
µP Supervisors
____________________________________________________________________________________________________________________________________________________________________________
17
Margin Output Disable ( MARGIN )
MARGIN allows system-level testing while power sup-
plies are adjusted from their nominal voltages. Drive
MARGIN low to force RESET and OUT_ high, regard-
less of the voltage at any monitored input. The state of
each output does not change while MARGIN = GND.
The watchdog timer continues to run when
MARGIN is low, and if a timeout occurs, RESET will
assert t
MD
after MARGIN is deasserted.
The MARGIN input is internally pulled up to V
CC
. Leave
MARGIN unconnected or connect to V
CC
if unused.
Undervoltage Lockout (UVLO)
The MAX16060/MAX16061/MAX16062 feature a V
CC
undervoltage lockout (UVLO) that preserves a reset
status even if V
CC
falls as low as 1V. The undervoltage
lockout circuitry monitors the voltage at V
CC
. If V
CC
falls below the UVLO falling threshold (typically
1.735V), RESET is asserted and all OUT_ are asserted
low. This eliminates an incorrect RESET or OUT_ output
state as V
CC
drops below the normal V
CC
operational
voltage range of 1.98V to 5.5V.
During power-up as V
CC
rises above 1V, RESET is
asserted and all OUT_ are asserted low until V
CC
exceeds the UVLO threshold. As V
CC
exceeds the UVLO
threshold, all inputs are monitored and the correct output
state appears at all the outputs. This also ensures that
RESET and all OUT_ are in the correct state once V
CC
reaches the normal V
CC
operational range.
Power-Supply Bypassing
In noisy applications, bypass V
CC
to ground with a
0.1µF capacitor as close to the device as possible. The
additional capacitor improves transient immunity. For
fast-rising V
CC
transients, additional capacitance may
be required.