MAX806TESA+T Maxim Integrated, MAX806TESA+T Datasheet - Page 9
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MAX806TESA+T
Manufacturer Part Number
MAX806TESA+T
Description
Supervisory Circuits NULL
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.MAX3182EUKT.pdf
(15 pages)
Specifications of MAX806TESA+T
Number Of Voltages Monitored
1
Monitored Voltage
1 V to 5.5 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
Backup
Supply Voltage - Max
5.5 V
Chip Enable Signals
No
Maximum Power Dissipation
727 mW
Power Fail Detection
Yes
Supply Current (typ)
50 uA
Supply Voltage - Min
1 V
Many µP-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on MR
asserts the reset output, clears the watchdog timer,
and deasserts the watchdog output. Reset remains
asserted while MR is low and for the reset timeout peri-
od (t
resistor allows MR to be left open if unused. Drive MR
with TTL or CMOS-logic levels or with open-drain/col-
lector outputs. Connect a normally open momentary
switch from MR to GND to create a manual reset func-
tion; external debounce circuitry is not required.
Connect a 0.1µF capacitor from MR to GND to provide
additional noise immunity when driving MR over long
cables or if the device is used in a noisy environment.
The MAX6734/MAX6735 provide an additional high-
impedance comparator input with a 626mV threshold to
monitor a third supply voltage. To monitor a voltage
higher than 626mV, connect a resistive-divider to the
circuit as shown in Figure 2 to establish an externally
controlled threshold voltage, V
Figure 1. RST, WDO, and MR Timing Diagram
RSTIN
RP
V
V
WDO
CC
RST
CC
MR
) after MR returns high. An internal 50kΩ pullup
1,
2
Circuits with Independent Watchdog Output
V
EXT_TH
Adjustable Input Voltage (RSTIN)
Single-/Dual-/Triple-Voltage µP Supervisory
(MIN)
V
CC
_______________________________________________________________________________________
= 626mV
V
TH
t
RP
EXT_TH
Manual Reset Input
×
(
R
1
R
+
.
2
R
2
)
t
Figure 2. Monitoring a Third Voltage
RP
R1
R2
V
EXT_TH
RSTIN
MAX6734
MAX6735
GND
9