19-2637; Rev 3; 6/10
µP Supervisors with Separate V Reset and
CC
Manual Reset Outputs
General Description
Features
The MAX6453–MAX6456 are low-power, dual-voltage
♦ Precision Factory-Set Reset Thresholds From
µP supervisors featuring separate V
reset and manu-
1.6V to 4.6V
CC
al reset outputs. The dual outputs support both soft-
system reset (interrupt) and hard-system reset (reboot)
functions. The reset output asserts when any of the
monitored voltages falls below its specified threshold
and remains asserted for the reset timeout (140ms min)
after all voltages exceed their respective reset thresh-
olds. All devices are offered with nine factory-fixed
reset thresholds for monitoring primary system voltages
♦ Adjustable Threshold to Monitor Voltages Down
to 0.63V
♦ Manual Reset Input with Extended Setup Period
♦ Immune to Short Voltage Transients
♦ Low 6µA Supply Current
♦ Guaranteed Valid Reset Down to V
= 1.0V
CC
(V ) from 1.8V to 5V and an adjustable reset input for
CC
♦ Active-Low RESET (Push-Pull or Open-Drain)
monitoring a secondary system voltage down to 0.63V.
Outputs
Each device has a manual reset input, a V
reset out-
♦ 140ms (min) Reset Timeout Period
♦ Small SOT Package
CC
put, and a manual reset output. The MAX6453/
MAX6454 manual reset output asserts when the manual
reset input is low. It remains asserted for the manual
reset timeout period (140ms min) after the manual reset
input transitions high. The MAX6453/MAX6354 manual
reset input controls only the manual reset output and
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23
MAX6453UT_ _ _-T
MAX6454UT_ _ _-T
MAX6455UT_ _ _-T
MAX6456UT_ _ _-T
does not affect the V
reset output.
CC
6 SOT23
The manual reset input of the MAX6455/MAX6456 con-
trols both the manual reset and V reset outputs. When
6 SOT23
CC
the manual reset input is low for less than the extended
setup timeout period, only the manual reset output
asserts and remains asserted for the manual reset time-
out period (140ms min) after the manual reset input tran-
sitions high. If the manual reset input is low for at least
the extended setup timeout period, the reset output also
asserts and remains asserted for the reset timeout peri-
od (140ms min) after the manual reset input transitions
high. This enhanced feature allows the implementation of
a soft/hard-system reset combination.
6 SOT23
Note: The first “_ _” is a placeholder for the threshold voltage
level of the devices. A desired threshold level is set by the part
number suffix found in Table 1. The third “_” is a placeholder for
the manual reset setup period of the devices. A desired setup
period is set by the letter suffix found in Table 2. All devices are
available in tape-and-reel only. There is a 2500-piece minimum
order increment for standard versions (Table 2). Sample stock
is typically held on standard versions only. Nonstandard ver-
sions require a minimum order increment of 10,000 pieces.
Contact factory for availability.
The MAX6453/MAX6455 have active-low, push-pull
reset and manual reset outputs, and the MAX6454/
MAX6456 have active-low, open-drain reset and manu-
al reset outputs. All devices are available in small
SOT23-6 packages and are fully specified over the
extended temperature range (-40°C to +85°C).
Devices are available in both leaded and lead(Pb)-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Selector Guide appears at end of data sheet.
Pin Configurations
Applications
TOP VIEW
Set-Top Boxes
Consumer Electronics
DVD Players
RESET
GND
1
2
3
6
5
4
MR
RESET
GND
1
2
3
6
5
4
MR
MAX6453
MAX6454
MAX6455
MAX6456
Cable/DSL Modems
MP3 Players
RSTIN
RSTIN
Industrial Equipment
Automotive
MROUT
V
MROUT
V
CC
CC
SOT23-6
SOT23-6
Medical Devices
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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