TCM1030 Datasheet, PDF (5/8 Pages) Texas Instruments – DUAL TRANSIENT-VOLTAGE SUPPRESSORS

TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
APPLICATION INFORMATION
SCTS040B – JUNE 1989 – REVISED JUNE 1997
Line short-circuits to external power sources can damage the suppressor due to excessive power dissipation.
Conventional protection techniques, such as fuses or PTC (positive temperature coefficient) thermistors, should
be used to eliminate or reduce the fault current.
Figure 2 shows a typical line card application circuit.
Control
Receive
Voice
Transmit
Voice
T
Subscriber Line ^TP
Interface Circuit
(SLIC)
RP
VBAT
GND R
48 V
1 _TIP
TIP ⁸
2
VS
TCM1030, _GND ⁷
TCM1050
6
GND
4
RING
5
RING
TIP
RP (see Note A)
RP (see Note A)
RING
0.47 µF
(see Note B)
0.1 µF
(see Note C)
NOTES: A. RP is 100 Ω minimum for TCM1030 and 70 Ω minimum for TCM1050.
B. 0.47 µF, 100 V stacked film metalized plastic capacitor
C. 0.1 µF, 100 V ceramic capacitor
Figure 2. Typical Line Card Application Circuit
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