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MAX16122 Datasheet(PDF) 8 Page - Maxim Integrated Products

Part No. MAX16122
Description  Dual Pushbutton Controllers in Tiny 6-Bump WLP Package
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX16122 Datasheet(HTML) 8 Page - Maxim Integrated Products

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All reset outputs are either active-low open-drain or
active-low push-pull (see the Selector Guide). RESET
changes from high to low whenever the monitored voltage
VCC drops below the reset threshold voltage. Once VCC
exceeds its respective reset threshold voltage, RESET
remains low for the reset timeout period (tRP) and then
goes high. RESET is one-shot pulsed whenever selected
manual reset inputs are asserted longer than the setup
delay (tSU). RESET stays asserted for the normal reset
timeout period.
RESET is guaranteed to be in the proper output
logic state for VCC ≥ 0.95V. For applications requir-
ing valid reset logic when VCC is less than 0.95V,
see the Ensuring a Valid RESET Output Down to
VCC = 0V (Push-Pull RESET Output) section.
Manual Reset Input
Each device in the MAX16122–MAX16125 family includes
at least one manual reset input, which must be held logic-
low for an extended setup period (tSU) before the RESET
output asserts. An internal pullup resistor is connected to
each manual reset input. When valid manual reset input
conditions/setup periods are met, the RESET output is
pulsed low for the reset timeout period (see Table 2).
Existing front-panel pushbutton switches (i.e., power-
on/-off, channel up/down, or mode select) can be used
to drive the manual reset inputs. The extended manual
reset setup period prevents nuisance system resets dur-
ing normal front-panel usage or resulting from inadvertent
short-term pushbutton closure.
The MAX16124/MAX16125 include a single manual reset
input (MR) and two reset outputs (RESET and SRESET).
The MAX16122/MAX16123 include two manual reset
inputs (MR1 and MR2) and one reset output, RESET. For
dual MR1 and MR2 devices, both inputs must be simulta-
neously pulled low and held for the extended setup period
(tSU) before the reset output is pulsed. The dual extended
setup provides greater protection from nuisance resets.
The MAX16122–MAX16125 RESET output is asserted
once for the reset timeout period after each valid manual
reset input condition. At least one manual reset input
must be released (go high) and then be driven low for
the extended setup period before RESET asserts again.
Internal timing circuitry debounces low-to-high manual
reset logic transitions, so no external circuitry is required.
Figure 1a. Reset Timing Diagram
tSU
tDB
tMRD
tRP
ONE-SHOT PULSE ON RESET
MR
RESET
*SRESET
(MR1 AND MR2)
GND
GND
*SRESET IS FOR MAX16124/MAX16125
( ) MR1 AND MR2 IS FOR MAX16122/MAX16123
GND
MAX16122–MAX16125
Dual Pushbutton Controllers in
Tiny 6-Bump WLP Package
www.maximintegrated.com
Maxim Integrated │ 8


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