Datasheet

Pin-Selectable Watchdog Timers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.5V to +5.5V, SET_ = V
CC
or GND, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C and
V
CC
= +3V.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Terminal Voltage (with respect to GND)
V
CC
.....................................................................-0.3V to +6V
WDI.....................................................................-0.3V to +6V
WDO (Open Drain: MAX6369/71/73) .................-0.3V to +6V
WDO (Push-Pull: MAX6370/72/74 .......-0.3V to (V
CC
+ 0.3V)
SET0, SET1, SET2 ................................-0.3V to (V
CC
+ 0.3V)
Maximum Current, Any Pin (input/output)...........................20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SOT23 (derate 8.75mW/°C above +70°C).........700mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
V
CC
Rise or Fall Rate......................................................0.05V/µs
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free...................................................................+260°C
Containing Lead (Pb).......................................................+240°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range V
CC
2.5 5.5 V
T
A
= -40°C to +85°C820
Supply Current I
CC
No load
T
A
= -40°C to +125°C1022
µA
Input High Voltage V
IH
WDI, SET0, SET1, SET2 0.8 × V
CC
V
V
CC
≥ 3.3V,
T
A
= -40°C to +85°C
0.8
V
CC
≥ 3.3V,
T
A
= -40°C to +125°C
0.6
V
CC
≥ 2.5V,
T
A
= -40°C to +85°C
0.6
Input Low Voltage V
IL
WDI, SET0,
SET1, SET2
V
CC
≥ 2.5V,
T
A
= -40°C to +125°C
0.4
V
Logic Input Current (Note 2) V
WDI
or V
SET_
= 0V or V
CC
0 ±10 nA
I
SINK
= 1.2mA, V
CC
> 2.7V, watchdog
output asserted
0.3 V
WDO Output Low
Voltage
V
OL
I
SINK
= 6mA, V
CC
> 4.5V, watchdog
output asserted
0.4 V
WDO Leakage Current I
LKG
V
WDO
= 0 to +5.5V, output deasserted,
MAX6369/MAX6371/MAX6373
1µA
I
SOURCE
= 500µA, V
CC
> 2.7V, watchdog
output deasserted
0.8 × V
CC
WDO Output High
Voltage
V
OH
I
SOURCE
= 800µA, V
CC
> 4.5V, watchdog
output deasserted
V
CC
- 1.5
V
2
Maxim Integrated
MAX6369–MAX6374