MAX6748 MAXIM [Maxim Integrated Products], MAX6748 Datasheet - Page 4

• Manufacturer Part Number: MAX6748
• Description: uP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
• Manufacturer: MAXIM [Maxim Integrated Products]

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