MAX6453–MAX6456
µP Supervisors with Separate V
Reset and
CC
Manual Reset Outputs
General Description
Features
● Precision Factory-Set Reset Thresholds From
The MAX6453–MAX6456 are low-power, dual-voltage
1.6V to 4.6V
µP supervisors featuring separate V
reset and manu-
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 thres-
holds. 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
● Active-Low RESET (Push-Pull or Open-Drain)
● Outputs
(V ) from 1.8V to 5V and an adjustable reset input for
CC
monitoring a secondary system voltage down to 0.63V.
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 transi-
tions high. The MAX6453/MAX6454 manual reset input
controls only the manual reset output and does not affect
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
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 timeout period
(140ms min) after the manual reset input transitions 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 period (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.
Devices are available in both leaded and lead(Pb)-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
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).
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
Applications
RESET
GND
1
2
3
6
5
4
MR
RESET
1
2
3
6
5
4
MR
● Set-Top Boxes
● Consumer Electronics
● DVD Players
● Cable/DSL Modems
● MP3 Players
● Industrial Equipment
● Medical Devices
MAX6453
MAX6454
MAX6455
MAX6456
RSTIN GND
RSTIN
MROUT
V
CC
MROUT
V
CC
SOT23-6
SOT23-6
19-2637; Rev 4; 5/14
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