MAX793SCSE+C48 Maxim Integrated, MAX793SCSE+C48 Datasheet - Page 9

• Manufacturer Part Number: MAX793SCSE+C48
• Description: Supervisory Circuits 3.0V/3.3V Adjustable Microprocessor Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX793, MAX793R, MAX793S, MAX793T, MAX794, MAX795, MAX795R, MAX795S, MAX795Tr

Specifications of MAX793SCSE+C48

• Number Of Voltages Monitored: 1
• Monitored Voltage: 3 V, 3.3 V
• Output Type: Active High, Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: Backup
• Supply Voltage - Max: 5.5 V
• Chip Enable Signals: Yes
• Maximum Power Dissipation: 842 mW
• Power Fail Detection: Yes
• Supply Current (typ): 62 uA
• Supply Voltage - Min: 1 V

brownout conditions. RESET is guaranteed to be a
logic low for 0V < V
greater than 1V. Without a backup battery (V
V
Once V
timer keeps RESET low for the reset timeout period
(t
ance (Figure 2). RESET is an open-drain output, and
requires a pullup resistor to V
4.7kΩ to 1MΩ pullup resistor that provides sufficient
current to assure the proper logic levels to the µP.
Figure 2. Timing Diagram, V
CC
RP
); after this interval, RESET becomes high imped-
= V
V
(MAX793/MAX794)
V
V
(MAX793)
V
(MAX793/MAX794)
V
MAX794: V
V
V
(MAX793/MAX794)
V
(RESET PULLED UP TO V
V
(MAX793/MAX794)
SHOWN FOR V
TYPICAL DELAY TIMES REFLECT A 40mV OVERDRIVE
LOWLINE
CE OUT
BOK
PFO
BATT ON
CC
RESET
CC
RESET
WDO
OUT
exceeds the reset threshold, an internal
), RESET is guaranteed valid for V
RESET IN
CC
_______________________________________________________________________________________
= 3.3V to 0V, V
= V
CC
CC
CC
(V
)
RST IN
CC
< V
3.0V/3.3V Adjustable Microprocessor
BATT
/ V
Falling
RST
RST
= 3.6V, CE IN = GND, PFI = V
V
)
LL
CC
, provided V
V
RST
(Figure 3). Use a
4µs
20µs
20µs
CC
10µs
CC
BATT
BATT
.
≥ 1V.
V
SW
is
=
25µs
25µs
25µs
25µs
25µs
If a brownout condition occurs (V
reset threshold), RESET goes low. Each time RESET is
asserted, it stays low for the reset timeout period. Any
time V
timer restarts.
The watchdog output (WDO) can also be used to initi-
ate a reset. See the Watchdog Output section.
The RESET output is the inverse of the RESET output,
and it can both source and sink current.
V
BATT
Supervisory Circuits
CC
V
BATT
goes below the reset threshold, the internal
CC
dips below the
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