MB3771PF Fujitsu Microelectronics, Inc., MB3771PF Datasheet - Page 13

• Manufacturer Part Number: MB3771PF
• Description: Power Supply Monitor
• Manufacturer: Fujitsu Microelectronics, Inc.

11. Low Voltage and Over Voltage Detection (V
12. Detection of Abnormal State of Power Supply System (V
V
low voltage is detected.
• This Example circuit detects abnormal low/over voltage of power supply voltage and is indicated by LED
• The detection levels of low/over voltages are determined by V
SH
indicator. LED is reset by the CLEAR key.
V
V
has no hysteresis. When over voltage is detected, RESET is held in the constant time as well as when
SL
SH
= (R
= (R
1
3
+ R
+ R
RESET
2
4
)
)
V
V
SL
V
V
CC
SB
SC
/R
/R
2
4
R
R
1
2
V
SH
V
CC
V
CC
R
R
3
4
1
2
3
4
MB3771
C
T
8
7
6
5
CC
= 5 V)
1
2
3
4
MB3771
R
R
1 k to 100 k
3
4
: 620
:
LED
SA
, and R
8
7
6
5
CC
= 5 V)
1
and R
CLEAR
R
R
1
2
2
respectively.
RESET
MB3771
13