BT151D STMicroelectronics, BT151D Datasheet - Page 7

• Manufacturer Part Number: BT151D
• Description: Tripolar Overvoltage Protection For Telecom Line
• Manufacturer: STMicroelectronics

THBT15011, THBT20011, THBT27011
2.1
Application circuits
Figure 9.
Figure 10. Protection for telephone set with ground key
LINE A
LINE B
LB
LA
E
T
E
S
T
R
E
L
A
Y
S
Line card protection
PTC
PTC
THBTxxxD
Ground key
THBTxxxD
GENERATOR
RING
RELAY
RING
Hook
LCP1521S
Application information
Speech
dialing
ringer
220
nF
- V
BAT
SLIC
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