ICL8212CBA HARRIS [Harris Corporation], ICL8212CBA Datasheet - Page 11

• Manufacturer Part Number: ICL8212CBA
• Description: Programmable Voltage Detectors
• Manufacturer: HARRIS [Harris Corporation]

FIGURE 27. TWO ATERNATIVE VOLTAGE DETECTION
R
R
R
3
2
1
OFF
ON
R
R
Q
P
R
CIRCUITS EMPLOYING HYSTERESIS TO
PROVIDE PAIRS OF WELL DEFINED TRIP
VOLTAGES
S
Low trip voltage
V
High trip voltage
V
TR1
TR2
Low trip voltage
V
High trip voltage
V
SUPPLY VOLTAGE
TR1
TR2
=
=
1
2
3
4
1
2
3
4
(R
FIG 7
=
=
(R
P
R
FIGURE 27A.
FIGURE 27B.
FIGURE 27C.
+ R
(R
R
Q
V
P
(R
Q
TR1
1
+ R
R
Q
1
+ R
S
)
+ R
R
S
x 1.15V
)
2
1
2
+ R
+ R
) x 1.15 + 0.1V
R
8
7
6
5
3
8
7
6
5
P
1
)
V
x 1.15V
TR2
x
R
1
P
x 1.15V
volts
ICL8211, ICL8212
ON
OFF
V
V+
V
O
V+
O
7-171
R
R
R
150k
3
2
1
FIGURE 29. NON-VOLATILE LOW VOLTAGE INDICATOR
R
FIGURE 28. LOW VOLTAGE BATTERY INDICATOR
2
OFF
ON
NOTE 1. R
S
1
(NOTE 1)
R
3
3
V
SUPPLY VOLTAGE
TR1
OPTIONAL
1
2
3
4
FIGURE 29A.
FIGURE 29B.
1
2
3
4
B
V
A
ICL8211
NOM
8
7
6
5
8
7
6
5
R
V
L
TR2
LAMP
LED
ON
OFF
OUTPUT
V+