Low-Cost, µP Supervisory Circuits
MAX705–MAX708/MAX813L
__________________________________________Typical Operating Characteristics
MAX705/MAX707
RESET OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
+5V
T
A
= +25°C
1V/div
V
CC
+5V
V
CC
MAX705/MAX707
RESET RESPONSE TIME
POWER-FAIL COMPARATOR
DE-ASSERTION RESPONSE TIME
PFI
+4V
+5V
PFO
V
CC
= +5V
T
A
= +25°C
1k
+3V
T
A
= +25°C
+5V
1V/div
PFO
30pF
+1.25V
0V
V
CC
RESET
V
CC
RESET
GND
0V
500ms/div
2k
+5V
V
CC
1V/div
RESET
V
CC
RESET
GND
10k
RESET
30pF
0V
+1.30V
PFI
0V
+1.20V
400ns/div
RESET
330pF
2µs/div
POWER-FAIL COMPARATOR
ASSERTION RESPONSE TIME
+5V
+5V
PFO
PFI
PFO
30pF
+1.25V
+1.30V
PFI
V
CC
= +5V
T
A
= +25°C
0V
50mV/div
+5V
1k
+5V
1V/div
+1.20V
400ns/div
MAX707
RESET, RESET ASSERTION
V
CC
= V
RT
T
A
= +25°C
+5V
MAX707
RESET, RESET DE-ASSERTION
V
CC
= V
RT
T
A
= +25°C
RESET
0V
V
CC
RESET
RESET
GND
0V
+5V
330pF
RESET
0V
400ns/div
1V/div
10k
10k
330pF
VCC
RESET
RESET
GND
10k
10k
330pF
RESET
2V/div
330pF
RESET
0V
400ns/div
MAX707/MAX708/MAX813L
RESET OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
+5V
T
A
= +25°C
1V/div
V
CC
+5V
V
CC
MAX813L
RESET RESPONSE TIME
+4V
V
CC
RESET
0V
V
CC
RESET
GND
+5V
10k
330pF
1V/div
0V
GND
10k
330pF
+4V
RESET
0V
500ms/div
0V
2µs/div
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
