Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 4.75V to 5.5V for MAX690A/MAX802L/MAX805L, V
CC
= 4.5V to 5.5V for MAX692A/MAX802M, V
BATT
= 2.8V,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MAX805LC, I
SOURCE
= 4µA, V
CC
= 1.1V
RESET Output Voltage
MAX805LE/M, I
SOURCE
= 4µA, V
CC
= 1.2V
MAX805L, I
SOURCE
= 800µA
MAX805L, I
SINK
= 3.2mA
Watchdog Timeout
WDI Pulse Width
WDI Input Threshold (Note 4)
WDI Input Current
PFI Input Threshold
PFI Input Current
PFO
Output Voltage
I
SOURCE
= 800µA
I
SINK
= 3.2mA
t
WD
t
WP
V
IL
= 0.4V, V
IH
= (0.8) (V
CC
)
V
CC
= 5V
WDI = V
CC
WDI = 0V
MAX69_A, MAX805L, V
CC
= 5V
MAX802_C/E, V
CC
= 5V
-150
1.20
1.225
-25
V
CC
- 1.5
Logic low
Logic high
3.5
50
-50
1.25
1.250
0.01
1.30
1.275
25
0.4
150
1.00
50
0.8
1.60
MIN
0.8
0.9
V
CC
- 1.5
0.4
2.25
sec
ns
V
µA
V
nA
V
V
TYP
MAX
UNITS
MAX690A/MAX692A/MAX802L/MAX802M/MAX805L
Note 2:
Either V
CC
or V
BATT
can go to 0V, if the other is greater than 2.0V.
Note 3:
"-" = battery-charging current, "+" = battery-discharging current.
Note 4:
WDI is guaranteed to be in an intermediate, non-logic level state if WDI is floating and V
CC
is in the operating voltage range.
WDI is internally biased to 35% of V
CC
with an input impedance of 50kΩ.
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3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
