TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
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 VS 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.
1
2
3
4
8
7
6
5
TIP
VS
NC
RING
TIP
GND
GND
RING
D OR P PACKAGE
(TOP VIEW)
NC – No internal connection
The D package is available taped and
reeled. Add R suffix (i.e., TCM1030DR).
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.
Copyright 1997, Texas Instruments Incorporated
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
Q1
TIP
GND
GND
VS
RING
Trip
Circuit
Q2
D1
D2
1
2
4
8
7
6
5
Trip
Circuit
TIP
RING
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
TCM1030 nonrepetitive peak surge current (see Note 1): 10/1000 ±16 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10/160 ±25 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2/10 ±35 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TCM1050 nonrepetitive peak positive surge current: 10/1000 30 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 1) 10/160 45 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2/10 50 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TCM1050 nonrepetitive peak negative surge current: 10/1000 –25 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 1) 10/160 –29 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2/10 –36 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nonrepetitive peak surge current, tw = 10 ms, half sinewave (see Note 2) 5 A. . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous 60-Hz sinewave at 1 A 2 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package 260°C. . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only , and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may af fect device reliability.
NOTES: 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.
2. This value applies when the case temperature is at or below 85°C. The surge current may be repeated after the device has returned
to thermal equilibrium.
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°COPERATING FACTOR T
A
= 85°C
PACKAGE
A
POWER RATING ABOVE TA = 25°C
A
POWER RATING
D725 mW 5.8 mW/°C 377 mW
P1000 mW 8.0 mW/°C 520 mW
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TCM1030 TCM1050
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP†MAX MIN TYP†MAX
UNIT
IFM = 1-A transient 1.2 2 1.2 2
VCF
Forward clamping voltage
(diode forward voltage) (see
IFM = 10-A transient 2.5 4 2 4
V
V
CF
(di
o
d
e
f
orwar
d
vo
lt
age
)
(
see
Not
e
3)
IFM = 16-A transient 4 5 2.5 5
V
Note
3)
IFM = 30-A transient — — — 3.1 5
ITM = 1-A transient –1.2 –2 –1.2 –2
VC(R)
Reverse clamping voltage
(SCR on state voltage) (see
ITM = 10-A transient –2.5 –4 –2.5 –4
V
V
C(R)
(SCR
on-s
t
a
t
e vo
lt
age
)
(
see
Not
e
3)
ITM = 16-A transient –4 –5 –3 –5
V
Note
3)
ITM = 30-A transient — — — –4.8 –7
II(trip) T rip current (see Note 4) VS = –50 V –100 –325 –100 –325 mA
IHHolding current VS = –50 V –100 –150 mA
VS = –50 V, I = trip current –50 –55 –50 –55
VI(trip) Trip voltage VS = –65 V, I = trip current –65 –70 –65 –70 V
()
VS = –85 V, I = trip current — — — –85 –90
II(stby) Standby current TIP and RING at –85 V or GND,
VS = –85 V ±5±5µA
T ransient overshoot voltage VS = –50 V, tr = 10 ns 2.5 2.5 V
Cff
Off-state (high impedance) TIP and RING at –50 V 25 25 p
F
C
off
(g )
capacitance TIP and RING at GND 50 50
pF
dv/dt Critical rate of rise of off-state
voltage (see Note 5) VS open, VS = –50 V –1 –1 kV/µs
†All typical values are at TA = 25°C.
NOTES: 3. The current flows through one TIP (or RING) terminal and one of the GND terminals. The voltage is measured between the other
TIP (or RING) terminal and the other GND terminal. Measurement time ≤ 1 ms.
4. The negative value of trip current refers to the current flowing out of TIP or RING on the line side that is sufficient in magnitude to
trigger the SCRs. Measurement time ≤ 1 ns.
5. The critical dv/dt is measured using a linear rate of rise with the maximum voltage limited to –50 V with VS connected to TIP or RING
being measured.
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
0
– 0.1
– 0.3
– 0.4
– 0.5
0.4
– 0.2
– 50 – 40 – 30 – 20 – 10 0 10
TIP or RING Current – A
0.2
0.1
0.3
Tip or Ring to GND Voltage – V
0.5
20 30 40 50
VS = –48 V
TA = 25°C
TIP OR RING CURRENT
vs
TIP OR RING TO GND VOLTAGE
Figure 1
APPLICATION INFORMATION
The trip voltage represents the most negative level of stress applied to the system. Positive transients are
clamped by diodes D1 and D2. When a negative transient is applied, current flows from VS to TIP or RING where
the transient voltage is applied. When the current through TIP or RING reaches the pulse-trip current, the SCR
turns on and shorts TIP or RING to GND. The majority of the transient energy is dissipated in the external resistor
(nominally 100 Ω for the TCM1030 and 70 Ω for the TCM1050). Current into VS ceases when the SCR turns
on. When the energy of the transient has been dissipated so that the current into TIP or RING due to the transient
plus the battery feed supply is less than the holding current, the SCR turns off.
To help ensure reliability and consistency in the firing voltage, it is recommended that two capacitors be
connected between VS and GND, as close to the device terminals as possible. One capacitor should be a 0.1-µF,
100-V ceramic unit and the other, a 0.47-µF, 100-V stacked-film (not wound) metalized plastic capacitor. If
inductance is present in the line to VS, these capacitors help prevent overshoot in the firing voltage during fast
rise-time transients.
To avoid dc latchup after the SCR has fired, the current must be less than the holding current, IH. To prevent
dc latchup, the line feed current must be limited to the following conditions:
VTP
*
VRP
Rline
)
2Rp
t
IH
where VTP and VRP are the voltages on TIP and RING, respectively , of the TCM1030 or TCM1050. Induced ac
currents into TIP or RING (e.g., power-line inductive coupling) must be less than the trip current to prevent the
SCR from firing.
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
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.
Subscriber Line
Interface Circuit
(SLIC)
T
TP
RP
R
GNDVBAT
TIP
GND
GND
VS
TIP
RING
RING
RING
TIP
TCM1030,
TCM1050
Control
Receive
Voice
Transmit
Voice
48 V
0.47 µF
(see Note B)
RP (see Note A)
RP (see Note A)
1
2
4
8
7
5
6
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
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
4040047/D 10/96
0.228 (5,80)
0.244 (6,20)
0.069 (1,75) MAX 0.010 (0,25)
0.004 (0,10)
1
14
0.014 (0,35)
0.020 (0,51)
A
0.157 (4,00)
0.150 (3,81)
7
8
0.044 (1,12)
0.016 (0,40)
Seating Plane
0.010 (0,25)
PINS **
0.008 (0,20) NOM
A MIN
A MAX
DIM
Gage Plane
0.189
(4,80)
(5,00)
0.197
8
(8,55)
(8,75)
0.337
14
0.344
(9,80)
16
0.394
(10,00)
0.386
0.004 (0,10)
M
0.010 (0,25)
0.050 (1,27)
0°–8°
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Falls within JEDEC MS-012
TCM1030, TCM1050
DUAL TRANSIENT-VOLTAGE SUPPRESSORS
SCTS040B – JUNE 1989 – REVISED JUNE 1997
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE
4040082/B 03/95
0.310 (7,87)
0.290 (7,37)
0.010 (0,25) NOM
0.400 (10,60)
0.355 (9,02)
58
41
0.020 (0,51) MIN
0.070 (1,78) MAX
0.240 (6,10)
0.260 (6,60)
0.200 (5,08) MAX
0.125 (3,18) MIN
0.015 (0,38)
0.021 (0,53)
Seating Plane
M
0.010 (0,25)
0.100 (2,54) 0°–15°
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
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Copyright 1998, Texas Instruments Incorporated
