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