MAX6354MTUK-T Maxim Integrated, MAX6354MTUK-T Datasheet - Page 7
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MAX6354MTUK-T
Manufacturer Part Number
MAX6354MTUK-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6351, MAX6352, MAX6353, MAX6354, MAX6355, MAX6356, MAX6357, MAX6358, MAX6359, MAX6360r
Datasheet
1.MAX1662EUB.pdf
(11 pages)
Specifications of MAX6354MTUK-T
Number Of Voltages Monitored
2
Monitored Voltage
1.8 V, 2.5 V, 3 V, 3.3 V, 5 V
Undervoltage Threshold
4.3 V, 3.03 V
Overvoltage Threshold
3.14 V, 4.46 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
280 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
571 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
20 uA
Supply Voltage - Min
1 V
The MAX6351–MAX6360 microprocessor (µP) superviso-
ry circuits maintain system integrity by alerting the µP to
fault conditions. These ICs monitor multiple-supply sys-
tems. The output reset state is guaranteed to remain
viable while either V
All the possible input voltage threshold level combina-
tions are indicated by a two-letter code in the Voltage
Threshold Levels table.
Figure 1. Functional Diagram
(5) 6
(5)
(5)
4
2
NOTE: PIN 1 IS RST1 FOR THE MAX6351 AND RST FOR THE
MAX6352–MAX6360. PIN 5 IS RST2 FOR THE MAX6351, RSTIN
FOR THE MAX6355/MAX6356/MAX6357, WDI FOR THE MAX6358/
MAX6359/MAX6360, AND V
V
V
(RSTIN)
(WDI)
GND
CC
CC
1
2
1.22V
V
V
TH
TH
1
2
_______________________________________________________________________________________
CC
1 or V
Detailed Description
CC
1 FOR THE MAX6352/MAX6353/MAX6354.
CC
WATCHDOG
TIMER
2 is above +1V.
MAX6351–MAX6360
GENERATOR
Threshold Levels
MR
Supply Voltages
RESET
GLITCH
FILTER
3
RST2 (5)
RST1
RST (1)
(1)
µP Supervisory Circuits
The MAX6351 provides two active-low, push-pull reset
outputs, one corresponding to each of its two moni-
tored voltages. The MAX6353/MAX6356/MAX6359 have
an active-low, push-pull reset output that is referenced
to V
active-low, push-pull reset output that is referenced to
V
active-low open-drain reset. The reset outputs are
maintained as long as at least one of the supplies is
above +1V.
The MAX6351–MAX6360 are designed to ignore short
negative-going V
Maximum V
Overdrive graph in the Typical Operating Characteristics.
The MAX6355/MAX6356/MAX6357 provide an addition-
al input to monitor a third voltage. The threshold voltage
at RSTIN is typically 1.22V. To monitor a voltage higher
than 1.22V, connect a resistive divider to the circuit as
shown in Figure 2. The threshold at V
Note that RSTIN is powered by V
must therefore remain lower than or equal to V
The MAX6358/MAX6359/MAX6360 include a dual-
mode watchdog timer to monitor µP activity. The flexi-
ble timeout architecture provides a startup mode,
allowing complicated systems to complete lengthy
boots, and a normal mode, allowing the supervisor to
provide quick alerts when processor activity fails.
Figure 2. Monitoring a Third Voltage
CC
CC
2. The MAX6352/MAX6355/MAX6358 provide an
1. The MAX6354/MAX6357/MAX6360 have an
Dual/Triple-Voltage
V
EXT
CC
V
CC
V
1 ≥ V
Negative-Going V
EXT_TH
Transient Duration vs. Reset Threshold
(MAX6355/MAX6356/MAX6357)
(MAX6358/MAX6359/MAX6360)
RSTIN
CC
1 and V
R1
R2
=
1.22V
RSTIN
CC
Third Input Voltage
MAX6355
MAX6356
MAX6357
2 transients. See the
R1
CC
Watchdog Input
R2
EXT
Reset Outputs
+
CC
1, and its voltage
R2
is:
Transients
CC
1.
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