Figure 9. Test Circuit for LED Operation
RLOOP
200Ω - 4kΩ
900Ω - 4.5kΩ (MLT)
Series rotary dial
VBAT
25Ω
-43.5V to -56V
60VPEAK, 2 Hz - 3 Hz (MLT)
1μF
+
85Ω
85mH
25Ω
Shunt rotary dial
RING
TIP
CPC1465
1μF
1
2
3
4
5
6
7
8
PR+
NC
16
15
14
13
12
11
10
9
TC
NC
VCC
5V
NC
NC
68.1Ω
1%
1/4 W
TIP
RING
NC
RS
CPC1001N
75kΩ
PD
4
3
1
2
VOUT
NC
NC
NC
2.2kΩ
5%
4W
COM
PR-
NOTE: Pinout is for the SOIC package
Figure 10. Typical ISDN NT1 Application Diagram
CPC1465
1μF
TC
NC
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
PR+
NC
NC
NC
VCC
68.1Ω
1%
1/4 W
5V
TIP
RS
TIP
RING
NC
CPC1001N
75kΩ
3.6V
PD
1
4
VOUT
1μF
RING
NC
3
2
NC
NC
2.2kΩ
5%
4W
COM
PR-
NOTE: Pinout is for the SOIC package
R02
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