Datasheet

MAX823/MAX824/MAX825
5-Pin Microprocessor Supervisory Circuits With
Watchdog Timer and Manual Reset
_______________________________________________________________________________________ 5
__________________________________________Typical Operating Characteristics
MAX823_, V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
1
3
2
6
5
4
8
7
9
-40 20 40-20 0 60 80 100 120
MAX823/4/5 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CC
SUPPLY CURRENT
vs. TEMPERATURE
MAX823L
(SC70 ONLY)
MAX824Y
MAX825R
250
150
-40 -20 40 100
RESET TIMEOUT PERIOD
vs. TEMPERATURE
170
160
180
230
240
MAX823/4/5 toc02
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
020 8060
210
220
190
200
30
0
-40 -20 40 100
RESET COMPARATOR PROPAGATION DELAY
vs. TEMPERATURE
5
25
MAX823/4/5 toc03
TEMPERATURE (°C)
PROPAGATION DELAY (µs)
020 8060
20
10
15
V
CC
FALLING
2.0
1.0
-40 -20 40 100
WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
1.2
1.1
1.3
1.8
1.9
MAX823/4/5 toc04
TEMPERATURE (°C)
WATCHDOG TIMEOUT PERIOD (s)
020 8060
1.6
1.7
1.4
1.5
1.06
0.94
0.96
0.98
1.00
1.02
1.04
-40 -20 40 100
NORMALIZED RESET THRESHOLD
VOLTAGE vs. TEMPERATURE
MAX823/4/5 toc05
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD (V)
020 8060
0
10
5
20
15
30
25
35
45
40
50
040608020 100 120 140 180160 200
MAX823/4/5 toc06
RESET THRESHOLD OVERDRIVE (mV), V
RST
- V
CC
TRANSIENT DURATION (µs)
(SC70 ONLY)
MAXIMUM V
CC
TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
RESET OCCURS
ABOVE CURVE
MAX82_Y
MAX82_R
MAX82_L