Datasheet

V
MAX690A/MAX692A/MAX802L/MAX802M/MAX805L
Microprocessor Supervisory Circuits
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RESET Output Voltage
MAX805LC, I
SOURCE
= 4µA, V
CC
= 1.1V
0.8
MAX805LE/M, I
SOURCE
= 4µA, V
CC
= 1.2V
0.9
MAX805L, I
SOURCE
= 800µA V
CC
- 1.5
MAX805L, I
SINK
= 3.2mA
0.4
Watchdog Timeout
t
WD
1.00 1.60 2.25 sec
PFO Output Voltage
I
SOURCE
= 800µA V
CC
- 1.5
V
I
SINK
= 3.2mA
0.4
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.
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.)
WDI = 0V -150 -50
V
WDI Input Current
WDI = V
CC
50 150
3.5
µA
WDI Input Threshold (Note 4)
V
CC
= 5V
0.8
V
WDI Pulse Width
t
WP
V
IL
= 0.4V, V
IH
= (0.8) (V
CC
)
50 ns
Logic low
Logic high
MAX69_A, MAX805L, V
CC
= 5V
1.20 1.25 1.30
PFI Input Threshold
MAX802_C/E, V
CC
= 5V
1.225 1.250 1.275
PFI Input Current -25 0.01 25 nA