Datasheet

MAX6342–MAX6345
6-Pin µP Reset Circuit with
Power-Fail Comparator
4 _______________________________________________________________________________________
0
2
1
4
3
5
6
0213456
MAX6342-04
SUPPLY VOLTAGE (V)
PFO OUTPUT-VOLTAGE HIGH
vs. SUPPLY VOLTAGE
PFO (V)
R
L
= 10kΩ
0.20
0.30
0.35
0.25
0.45
0.40
0.50
0.55
0.60
0213456
MAX6342-05
SUPPLY VOLTAGE (V)
PFO OUTPUT-VOLTAGE LOW
vs. SUPPLY VOLTAGE
PFO (V)
R
L
= 1kΩ
10µs/div
MAX6342-06
MAX6344/MAX6345
RESET RESPONSE TIME
V
CC
RESET
0
4V
5V
4V
2µs/div
MAX6342-07
MAX6342/MAX6345
RESET RESPONSE TIME
V
CC
0
4V
5V
4V
RESET
5V
Typical Operating Characteristics (continued)
(V
PFI
= V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
Pin Description
MAX6344
1 1 Supply Voltage
2 2 Ground
MAX6342
3 3
Power-Fail Voltage Monitor Input. When PFI is < 1.25V, PFO
goes low. Connect PFI to GND or V
CC
when not used.
4 4 Power-Fail Voltage Monitor Output
FUNCTION
PIN
NAME
1
2
MAX6343
3
4
MAX6345
1
2
3
4
V
CC
GND
PFI
PFO