THBTXXX11D Datasheet, PDF (7/9 Pages) STMicroelectronics – TRIPOLAR OVERVOLTAGE PROTECTION FOR TELECOM LINE

APPLICATION CIRCUIT :
1 - Line card protection
RING
GENERATOR
LINE A
T
E
S
T
R
E
L
A
Y
S
LINE B
PTC
THBTxxxD
PTC
RING
RELAY
THBTxxx11D
- V_BAT
LCP1511D
SLIC
220
nF
2 - Protection for telephone set with ground key
LA
LB
THBTxxxD
GROUND KEY
E
HOOK
SPEECH
DIALING
RINGER
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