MAX806SESA+ Maxim Integrated, MAX806SESA+ Datasheet - Page 7
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MAX806SESA+
Manufacturer Part Number
MAX806SESA+
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX690R, MAX690S, MAX690T, MAX704R, MAX704S, MAX704T, MAX802, MAX802R, MAX802S, MAX802T, MAX804, MAX804R, MAX804S, MAX804T, MAX805, MAX805R, MAX805S, MAX805T, MAX806, MAX806R, MAX806S, MAX806Tr
Datasheet
1.MAX1662EUB.pdf
(11 pages)
Specifications of MAX806SESA+
Number Of Voltages Monitored
1
Monitored Voltage
1.1 V to 5.5 V
Undervoltage Threshold
2.88 V
Overvoltage Threshold
3.02 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
Backup
Power-up Reset Delay (typ)
200 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8 Narrow
Chip Enable Signals
No
Maximum Power Dissipation
471 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
Yes
Supply Current (typ)
50 uA
Supply Voltage - Min
1.1 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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