Datasheet

MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
4
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
1 = V
CC
2 = +0.8V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
WATCHDOG INPUT
t
WD-L
First watchdog period after reset
timeout period
35 54 72
Watchdog Timeout Period
t
WD-S
Normal mode 1.12 1.68 2.24
s
WDI Pulse Width t
WDI
(Note 3) 50 ns
V
IL
0.3  V
CC
1
WDI Input Voltage
V
IH
0.7  V
CC
1
V
WDI Input Current I
WDI
WDI = 0 or V
CC
1 -1 +1 μA
RESET/WATCHDOG OUTPUT
V
CC
1 or V
CC
2 +0.8V,
I
SINK
= 1μA, output asserted
0.3
V
CC
1 or V
CC
2 +1.0V,
I
SINK
= 50μA, output asserted
0.3
V
CC
1 or V
CC
2 +1.2V,
I
SINK
= 100μA, output asserted
0.3
V
CC
1 or V
CC
2 +2.7V,
I
SINK
= 1.2mA, output asserted
0.3
RST / WDO Output Low Voltage
(Push-Pull or Open Drain)
V
OL
V
CC
1 or V
CC
2 +4.5V,
I
SINK
= 3.2mA, output asserted
0.4
V
V
CC
1 +1.8V, I
SOURCE
= 200μA,
output not asserted
0.8  V
CC
1
V
CC
1 +2.7V, I
SOURCE
= 500μA,
output not asserted
0.8  V
CC
1
RST / WDO Output High Voltage
(Push-Pull Only)
V
OH
V
CC
1 +4.5V, I
SOURCE
= 800μA,
output not asserted
0.8  V
CC
1
V
RST / WDO Output Open-Drain
Leakage Current
Output not asserted 0.5 μA
Note 2: Devices tested at T
A
= +25°C. Overtemperature limits are guaranteed by design and not production tested.
Note 3: Parameter guaranteed by design.