Datasheet

(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
WATCHDOG TIMEOUT PERIOD vs. C
SWT
MAX6746 toc02
C
SWT
(pF)
WATCHDOG TIMEOUT PERIOD (ms)
10,0001000
1
10
100
1000
10,000
100,000
0.1
100
100,000
MAX6746–MAX6751
EXTENDED MODE
NORMAL MODE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6746 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5432
2
1
3
4
5
6
0
1 6
NORMALIZED RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6746 toc04
TEMPERATURE (°C)
NORMALIZED TIMEOUT PERIOD
1007550250-25
0.95
1.00
1.05
1.10
1.15
1.20
0.90
-50 125
C
SRT
= 100pF
C
SRT
= 1500pF
NORMALIZED WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
MAX6746 toc05
TEMPERATURE (°C)
NORMALIZED TIMEOUT PERIOD
1007550250-25
0.95
0.90
0.85
1.00
1.05
1.10
1.15
1.20
0.80
-50 125
C
SWT
= 100pF
C
SWT
= 1500pF
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6746 toc06
RESET THRESHOLD OVERDRIVE (mV)
TRANSIENT DURATION (µs)
800600400200
25
50
75
100
125
150
175
0
0 1000
RESET OCCURS
ABOVE THE CURVE
V
TH
= 2.92V
SUPPLY CURRENT
vs. TEMPERATURE
MAX6746 toc07
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
1007525 500-25
1
2
3
4
5
6
0
-50 125
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 5V
RESET TIMEOUT PERIOD vs. C
SRT
MAX6746 toc01
C
SRT
(pF)
RESET TIMEOUT PERIOD (ms)
10,0001000
1
10
100
1000
0.1
100 100,000
NORMALIZED RESET IN THRESHOLD VOLTAGE
vs. TEMPERATURE
MAX6746 toc08
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD VOLTAGE
1007550250-25
0.994
0.992
0.996
1.000
0.998
1.004
1.002
1.008
1.006
1.010
0.990
-50 125
V
CC
= 5V
RESET IN THRESHOLD
vs. SUPPLY VOLTAGE
MAX6746 toc08b
SUPPLY VOLTAGE (V)
RESET IN THRESHOLD (V)
5432
1.236
1.237
1.238
1.239
1.240
1.235
1 6
Maxim Integrated │ 4
www.maximintegrated.com
MAX6746–MAX6753 μP Reset Circuits with Capacitor-Adjustable
Reset/Watchdog Timeout Delay
Typical Operating Characteristics