Datasheet

MAX821/MAX822
4-Pin µP Voltage Monitors with Pin-Selectable
Power-On Reset Timeout Delay
4 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
0.997
-40
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
0.999
0.998
MAX 821/822 TOC-07
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD (V)
40 60 80
1.002
1.001
1.000
-20 20 100
1.003
0
______________________________________________________________Pin Description
1
GND Ground
2
RESET
Active-Low Reset Output. RESET is low while V
CC
is below the reset threshold. It remains
low for the reset timeout period after the reset condition is terminated. The reset timeout
period is determined by the SRT input.
–
RESET
Active-High Reset Output. RESET is high while V
CC
is below the reset threshold. It remains
high for the reset timeout period after the reset condition is terminated. The reset timeout
period is determined by the SRT input.
3 SRT
Set Reset Timeout Input. Connect to GND for 1ms (max) delay; connect to V
CC
for 20ms
(min) delay; leave unconnected for 100ms (min) delay.
4 V
CC
Supply Voltage
1
–
PIN
2
3
4
NAME FUNCTION
MAX821 MAX822
0
-40
MAX82_R/S/T POWER-DOWN RESET DELAY
vs. TEMPERATURE
10
5
MAX 821/822 TOC-02
TEMPERATURE (°C)
POWER-DOWN RESET DELAY (µs)
40 60 80
40
35
30
25
20
15
-20 20 100
45
0
V
CC
FALLING AT 1mV/
µ
s
V
CC
FALLING AT 10mV/
µ
s
0
-40
MAX82_L/M POWER-DOWN RESET DELAY
vs. TEMPERATURE
20
10
MAX 821/822 TOC-03
TEMPERATURE (°C)
POWER-DOWN RESET DELAY (µs)
40 60 80
50
40
30
-20 20 100
60
0
V
CC
FALLING AT 1mV/
µ
s
V
CC
FALLING AT 10mV/
µ
s
0.90
-40
NORMALIZED SUPPLY
CURRENT vs. TEMPERATURE
0.95
MAX 821/822 TOC-01
TEMPERATURE (°C)
NORMALIZED SUPPLY CURRENT (µA)
40 60 80
1.05
1.00
-20 20 100
1.10
0