Datasheet

MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
V
CC
........................................................................-0.3V to +6.0V
Input Voltage (with respect to GND)
WDI, WDO, RESET, RESET ..…………………………-0.3V to V
CC
Operating Temperature Range
C Suffix………………………………………………0°C to +70°C
E Suffix......……………………………………….-40°C to +85°C
Rate of Rise, V
CC
.................………………………………100V/µs
Power Dissipation (T
A
= +70°C)
8-Pin PDIP (derated 5mW/°C above +70°C).....………400mW
16-Pin SO (derated 7mW/°C above +70°C) ................600mW
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS
MIN TYP MAX UNITS
Operating Voltage Range T
A
= full 3.0 5.5 V
Supply Current 5mA
Power-Up Reset Deassertion T
A
= full
4.50 4.65 4.75
V
Power-Up Reset Assertion T
A
= full 4.4 V
Hysteresis 40 mV
Reset Output Pulse Width
140
500 ms
Output low I
SINK
= 1.6mA, V
CC
= 4.4V 0.4
RESET OUTPUT (Open Drain)
Output high I
SOURCE
= 1µA, V
CC
= 5V 3.5
V
Output low I
SINK
= 1.6mA, V
CC
= 5V 0.4
RESET OUTPUT (SO Package
Only)
Output high I
SOURCE
= 1µA, V
CC
= 4.4V 3.5
V
Output low I
SINK
= 1.6mA, V
CC
= 5V 0.4
WDO Output (MAX699 SO
Package Only)
Output high I
SOURCE
= 1µA, V
CC
= 4.4V 3.5
V
MAX699 Watchdog Timeout
Period
1.00
1.6
2.25
s
MAX699 Minimum WDI Input
Pulse Width
200
ns
Locic-low 0.8
MAX699 WDI Input Threshold V
CC
= +5V
Logic-high 3.8
V
WDI = V
CC
20 50
MAX699 WDI Input Current
WDI = 0V -50
-15
µA