![](/html/LiteOn/887572/page4.png)
TYPICAL CIRCUIT APPLICATIONS
TL0640H thru TL3500H
RING
TIP
FUSE
TSPD 1
TELECOM
EQUIPMENT
E.G. MODEM
RING
TIP
PTC
TSPD 1
TSPD 2
PTC
TELECOM
EQUIPMENT
E.G. ISDN
RING
TIP
PTC
TSPD 1
PTC
TSPD 2
TELECOM
EQUIPMENT
TSPD 3
E.G. LINE
CARD
The PTC (Positive Temperature Coefficient) is an overcurrent protection device
REV. 0, 03-Dec-2001, KDWE01