TCM1030 Datasheet, PDF (1/8 Pages) Texas Instruments – DUAL TRANSIENT-VOLTAGE SUPPRESSORS

TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
D Meet or Exceed Bell Standard LSSGR
Requirements
D Externally-Controlled Negative Firing
Voltage . . . – 90 V Max
D Accurately Controlled, Wide Negative
Firing Voltage Range . . . – 5 V to – 85 V
D Positive Surge Current (see Note 1):
TCM1030
TCM1050
10/1000
16 A
30 A
10/160
25 A
45 A
2/10
35 A
50 A
D Negative Surge Current (see Note 1):
TCM1030
TCM1050
10/1000
– 16 A
– 25 A
10/160
– 25 A
– 29 A
2/10
– 35 A
– 36 A
D High Holding Current
– TCM1030 . . . 100 mA Min
– TCM1050 . . . 150 mA Min
SCTS040B – JUNE 1989 – REVISED JUNE 1997
D OR P PACKAGE
(TOP VIEW)
TIP 1
V_S 2
NC 3
RING 4
8 TIP
7 GND
6 GND
5 RING
NC – No internal connection
The D package is available taped and
reeled. Add R suffix (i.e., TCM1030DR).
description
The TCM1030 and TCM1050 dual transient-voltage suppressors are designed specifically for telephone line
card protection against lightning and transients (voltage transients) induced by ac lines. One of the TIP terminals
(pin 1 or 8) and one of the RING terminals (pin 4 or 5) are connected to the tip and ring circuits of a SLIC
(subscriber-line interface circuit). The battery feed connections between the SLIC and the subscriber line are
from the remaining TIP (pin 1 or 8) and RING (pin 4 or 5) through the TCM1030 or the TCM1050 to the tip and
ring lines. Transients are suppressed between tip and ground, and ring and ground.
Positive transients are clamped by diodes D1 and D2. Negative transients that are more negative than V_S cause
the SCRs, Q1 and Q2, to crowbar. The high holding current of the SCRs prevent dc latchup as the transient
subsides.
The TCM1030 and TCM1050 are characterized for operation from – 40°C to 85°C.
NOTE 1: The notation 10/1000 refers to a waveshape having tr = 10 µs and tw = 1000 µs ending at 50% of the peak value. The notation 10/160
is tr = 10 µs and tw = 160 µs. The notation 2/10 is tr = 2 µs and tw = 10 µs.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1997, Texas Instruments Incorporated
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