MAX6728KARDD1-T Maxim Integrated, MAX6728KARDD1-T Datasheet - Page 9
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MAX6728KARDD1-T
Manufacturer Part Number
MAX6728KARDD1-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6715, MAX6716, MAX6717, MAX6718, MAX6719, MAX6720, MAX6721, MAX6722, MAX6723, MAX6724, MAX6725, MAX6726, MAX6727, MAX6728, MAX6729r
Datasheet
1.MAX185BEWGT.pdf
(19 pages)
Specifications of MAX6728KARDD1-T
Number Of Voltages Monitored
3
Monitored Voltage
1.8 V to 5 V, 0.9 V to 3.3 V
Undervoltage Threshold
2.55 V, 0.765 V, Adjustable
Overvoltage Threshold
2.7 V, 0.81 V, Adjustable
Output Type
Active Low, Open Drain
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
1.65 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23
Chip Enable Signals
No
Maximum Power Dissipation
714 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
Yes
Supply Current (typ)
15 uA
Supply Voltage - Min
0.8 V
The MAX6715–MAX6729 microprocessor (µP) supervi-
sory circuits maintain system integrity by alerting the µP
to fault conditions. These ICs are optimized for systems
that monitor two or three supply voltages. The output-
reset state is guaranteed to remain valid while either
V
Input voltage threshold level combinations are indicat-
ed by a two-letter code in the Reset Voltage Threshold
MAX6715/
MAX6716
CC
—
—
1 or V
CC
MAX6717/
MAX6718
2 is above 0.8V.
—
—
_______________________________________________________________________________________
Dual/Triple Ultra-Low-Voltage SOT23 µP
MAX6719/
MAX6720
Detailed Description
—
—
MAX6721/
MAX6722
Threshold Levels
Supply Voltages
—
—
PIN
MAX6723/
MAX6724
—
—
MAX6725/
MAX6726
—
4
Suffix Guide (Table 1). Contact factory for availability of
other voltage threshold combinations.
The MAX6715–MAX6729 provides an active-low reset
output (RST) and the MAX6725/MAX6726 provides
both an active-high (RST) and an active-low reset out-
put (RST). RST, RST, RST1, and RST2 are asserted
when the voltage at either V
voltage threshold level, RSTIN drops below threshold,
or MR is pulled low. Once reset is asserted it stays low
for the reset timeout period (see Table 2). If V
V
the reset timeout period is completed, the internal timer
CC
MAX6727
2, or RSTIN goes below the reset threshold before
Supervisory Circuits
—
—
Pin Description (continued)
MAX6728/
MAX6729
—
4
NAME
PFO
RST
CC
1 or V
Active-Low Power-Fail
Monitor Output, Open-
Drain or Push-Pull. PFO is
asserted low when PFI is
less than 0.626V. PFO
deasserts without a reset
timeout period. Open-
drain outputs require an
external pullup resistor.
Push-pull outputs are
referenced to V
Active-High Reset
Output, Open-Drain or
Push-Pull. RST changes
from low to high when
V
below selected reset
thresholds, RSTIN is
below threshold, MR is
pulled low, or the
watchdog triggers a
reset. RST remains HIGH
for the reset timeout
period after V
V
device reset thresholds,
MR goes low to high, or
the watchdog triggers a
reset. Open-drain outputs
require an external pullup
resistor. Push-pull
outputs are referenced to
V
CC
CC
CC
1 or V
1.
2/RSTIN exceed the
CC
Reset Outputs
FUNCTION
2 falls below the
CC
2 drops
CC
CC
1/
1.
CC
1,
9