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MAX6888AETE Datasheet(PDF) 11 Page - Maxim Integrated Products

Part # MAX6888AETE
Description  Hex/Quad, Power-Supply Supervisory Circuits
Download  14 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX6888AETE Datasheet(HTML) 11 Page - Maxim Integrated Products

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At power-up, WDO goes high after tD-PO (see Figure 3).
The initial watchdog timeout period (tWDI) applies imme-
diately after WDO is high. The initial watchdog timeout
period allows the µP to perform its initialization process.
A normal watchdog timeout period (tWD) applies when-
ever WDI transitions from high to low after the initial
watchdog timeout period occurs. WDI monitors the tog-
gling output of the µP, indicating normal processor
behavior. If WDI does not toggle during the normal
watchdog timeout period (tWD), indicating that the
processor has stopped operating or is stuck in an infinite
execution loop, WDO goes low. WDO stays low until the
next transition on WDI. An initial watchdog timeout peri-
od (tWDI) starts when WDO goes high.
If WDO is connected to MR, the WDO will assert for a
short duration (~5µs), long enough to assert the RESET
output. Asserting RESET clears the watchdog timer and
WDO goes high. The reset output will remain asserted
for its timeout period after a watchdog fault. The watch-
dog timer stays cleared as long as RESET is low.
Applications Information
Layout and Bypassing
For better noise immunity, bypass each of the voltage-
detector inputs to GND with 0.1µF capacitors installed
as close to the device as possible. Bypass VCC and BP
to GND with 1µF capacitors installed as close to the
device as possible. VCC (when not externally supplied)
and BP are internally generated voltages and should
not be used to supply power to external circuitry.
Hex/Quad, Power-Supply Supervisory Circuits
______________________________________________________________________________________
11
Selector Guide (continued)
NOMINAL INPUT
VOLTAGE (V)*
PART
IN1
IN2
IN3
IN4
TOLERANCE
(%)
MAX6888AETE
5.0
3.3
2.5
1.8
5
MAX6888BETE
5.0
3.3
2.5
Adj
5
MAX6888CETE
5.0
3.3
1.8
Adj
5
MAX6888DETE
3.3
2.5
1.8
1.5
5
MAX6888EETE
3.3
2.5
1.8
Adj
5
MAX6888FETE
3.3
2.5
1.5
Adj
5
MAX6888GETE
3.3
2.5
Adj
Adj
5
MAX6888HETE
3.3
1.8
Adj
Adj
5
MAX6888QETE
Adj
Adj
Adj
Adj
5
MAX6888IETE
5.0
3.3
2.5
1.8
10
MAX6888JETE
5.0
3.3
2.5
Adj
10
MAX6888KETE
5.0
3.3
1.8
Adj
10
MAX6888LETE
3.3
2.5
1.8
1.5
10
MAX6888METE
3.3
2.5
1.8
Adj
10
MAX6888NETE
3.3
2.5
1.5
Adj
10
MAX6888OETE
3.3
2.5
Adj
Adj
10
MAX6888PETE
3.3
1.8
Adj
Adj
10
MAX6888RETE
Adj
Adj
Adj
Adj
10
*See thresholds options tables (Tables 1 and 2) for actual under-
voltage and overvoltage thresholds.
Chip Information
PROCESS: BiCMOS


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