MAX6746 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX6746 Datasheet PDF : 14 Pages
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µP Reset Circuits with Capacitor-Adjustable
Reset/Watchdog Timeout Delay
(VCC = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
RESET TIMEOUT PERIOD vs. CSRT
10,000
1000
100
10
1
WATCHDOG TIMEOUT PERIOD vs. CSWT
100,000
MAX6746–MAX6751
10,000
1000
EXTENDED MODE
100
10
NORMAL MODE
1
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
6
5
4
3
2
1
0.1
100
1000
10,000
CSRT (pF)
100,000
0.1
100
1000
10,000
CSWT (pF)
100,000
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
NORMALIZED RESET TIMEOUT PERIOD
vs. TEMPERATURE
1.20
1.15
1.10
CSRT = 100pF
1.05
1.00
CSRT = 1500pF
0.95
0.90
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
SUPPLY CURRENT
vs. TEMPERATURE
6
5
VCC = 5V
4
3
VCC = 1.8V
VCC = 3.3V
2
1
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
NORMALIZED WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
1.20
1.15
1.10
1.05
CSWT = 100pF
1.00
CSWT = 1500pF
0.95
0.90
0.85
0.80
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
NORMALIZED RESET IN THRESHOLD VOLTAGE
vs. TEMPERATURE
1.010
VCC = 5V
1.008
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
0.990
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
175
150
125
100
RESET OCCURS
ABOVE THE CURVE
75
50
25
0
0
VTH = 2.92V
200 400 600 800 1000
RESET THRESHOLD OVERDRIVE (mV)
RESET IN THRESHOLD
vs. SUPPLY VOLTAGE
1.240
1.239
1.238
1.237
1.236
1.235
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
4 _______________________________________________________________________________________
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