MAX16060 Datasheet, PDF (17/18 Pages) Maxim Integrated Products – 1% Accurate, Quad-/Hex-/Octal-Voltage uP Supervisors

1% Accurate, Quad-/Hex-/Octal-Voltage
µP Supervisors
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.
______________________________________________________________________________________ 17