Detailed Description
The MAX16140 is a 370nA supervisor IC that moni-
tors the V
CC
voltage from 1.7V to 4.85V in 50mV increments.
The manual reset input is factory-programmable to
assert the reset output using an edge-trigger or level-
trigger input. During normal operation when the V
CC
voltage falls below the factory-set threshold, the reset
output asserts and remains asserted for the reset timeout
period after the V
CC
voltage rises above the threshold
voltage. The MAX16140 features an open-drain reset
output. See Table 1 for more detail.
Manual Reset Input
Many μP-based products require manual reset capability,
allowing the operator, a test technician, or external logic
circuit to initiate a reset. The MAX16140 features four
factory-programmable manual reset input configurations.
See Table 2 for available options.
For the edge-triggered manual reset input configuration,
the MAX16140 asserts the reset output when it
senses the first falling/rising edge at MR. The MAX16140
ignores any subsequent transition on MR until after
the expiration of the reset timeout period. See Figure 1
and Figure 2 for more detail.
For the level-trigger manual reset input configuration, the
MAX16140 asserts the reset output after MR stays in
active state longer than the debounce period (t
DB
). The
reset output deasserts after the reset timeout period when
MR becomes inactive. See Figure 3 and Figure 4 for more
detail.
DRIVER
RST
GND
DELAY
COUNTERS
MR
V
CC
MAX16140
BANDGAP
AND
COMPARATOR
POR
MR TRIGGER
CTRL
OSC
Functional Diagrams
www.maximintegrated.com
Maxim Integrated
│
6
MAX16140 nanoPower, Tiny Supervisor
with Manual Reset Input
