Datasheet

(V
CC
= 4.75V to 5.5V for MAX705/MAX707/MAX813L, V
CC
= 4.5V to 5.5V for MAX706/MAX708, T
A
= T
MIN
to T
MAX
, unless otherwise
noted.)
Note 2: Applies to both RESET in the MAX705–MAX708 and RESET in the MAX707/MAX708/MAX813L.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Watchdog Timeout Period t
WD
MAX705, MAX706, MAX813L 1.00 1.60 2.25 s
WDI Pulse Width t
WP
V
IL
= 0.4V, V
IH
= (V
CC
) (0.8) 50 ns
WDI Input Threshold
Low
MAX705, MAX706, MAX813L, V
CC
= 5V
0.8
V
High 3.5
WDI Input Current
MAX705, MAX706, MAX813L, V
CC
= 5V 50 150
µA
MAX705, MAX706, MAX813L, WDI = 0V -150 -50
WDO Output Voltage
MAX705, MAX706, MAX813L,
I
SOURCE
= 800μA
V
CC
- 1.5
V
MAX705, MAX706, MAX813L,
I
SINK
= 1.2mA
0.4
MR Pull-Up Current MR = 0V 100 250 600 μA
MR Pulse Width t
MR
150 ns
MR Input Threshold
Low 0.8
V
High 2.0
MR to Reset Out Delay (Note 2) t
MD
250 ns
PFI Input Threshold V
CC
= 5V 1.20 1.25 1.30 V
PFI Input Current -25.00 +0.01 +25.00 nA
PFO Output Voltage
I
SOURCE
= 800μA V
CC
- 1.5
V
I
SINK
= 3.2mA 0.4
MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L
Low-Cost, μP Supervisory Circuits
www.maximintegrated.com
Maxim Integrated │ 3
Electrical Characteristics (continued)