November 2007 Rev 5 1/9
9
TPI
Tripolar protection for ISDN interfaces
Features
■Bidirectional triple crowbar protection
■Peak pulse current:
IPP = 30 A , 10/1000 µs
■Breakdown voltage:
– TPI80N: 80 V
– TPI120N: 120 V
■Available in SO-8 package
■Low dynamic breakover voltage:
– TPI8011N: 120 V
– TPI12011N: 170 V
Benefits
■Low capacitance from lines to ground, allowing
high speed transmission without signal
attenuation
■Good capacitance balance between lines to
ensure longitudinal balance
■Fixed breakdown voltage in both common and
differential modes
■The same surge current capability in both
common and differential modes
■A particular attention has been given to the
internal wire bonding. The “4-point”
configuration ensures a reliable protection,
eliminating overvoltages introduced by the
parasitic inductances of the wiring (LdI/dt),
especially for very fast transient overvoltages
TM: Trisil is a trademark of STMicroelectronics
Complies with following standards
■CCITT K17-K20
– 10/700 µs, 1.5 kV
– 5/310 µs, 38 A
■VDE 0433
– 10/700 µs, 2 kV
– 5/310 µs, 50 A
■VDE 0878
– 1.2/50 µs, 1.5 kV
– 1/20 µs, 40 A
■IEC 61000-4-2 level 4
– 0.5/700 µs, 1.5 kV
– 0.2/310 µs, 38 A
Description
Dedicated devices for ISDN interface and high
speed data telecom line protection. Equivalent to
a triple Trisil™ with low capacitance.
Figure 1. Functional diagram
SO-8
Tip
GND
GND
Ring
Tip
GND
GND
Ring
1
2
3
45
6
7
8
www.st.com
Characteristics TPI
2/9
1 Characteristics
Figure 2.
Table 1. Absolute ratings (Tamb = 25 °C)
Symbol Parameter Value Unit
IPP Peak pulse current (see note (1))
1. See Figure 3.
10/1000 µs
5/310 µs
2/10 µs
30
40
90
A
ITSM Non repetitive surge peak on-state current (F = 50 Hz) tp = 10 ms
t = 1s
8
3.5 A
Tstg
Tj
Storage temperature range
Maximum junction temperature
- 55 to 150
150 °C
TLMaximum lead temperature for soldering during 10 s. 260 °C
Table 2. Thermal resistances
Symbol Parameter Value Unit
Rth(j-a) Junction to ambient 170 °C/W
Table 3. Electrical characteristics (Tamb = 25 °C)
Symbol Parameter
VRM Stand-off voltage
VBR Breakdown voltage
VBO Breakover voltage
IRM Leakage current
IPP Peak pulse current
IBO Breakover current
IHHolding current
VFForward voltage drop
C Capacitance
Order code
IRM @ VRM VBR @ IRVBO
VBO
dyn. IBO IH
max. min. max.
note (1)
1. See the reference test circuit 1 (Figure 5.)
typ.
note (2)
2. Surge test according to CCITT 1.5 kV, 10/700 µs between Tip or Ring and ground
max.
note (1)
min.
note(3)
3. See functional holding current test circuit 2 (Figure 6.)
µA V V mA V V mA mA
TPI8011N 10 70 80 1 110 120 800 150
TPI12011N 10 105 120 1 160 170 800 150
TPI Characteristics
3/9
Table 4. Capacitance characteristics
CONFIGURATION CA (pF)
max.
CB (pF)
max.
CA - CB (pF)
max.
VA = -1 V
VB = -56 V 45 15 30
VA = -56 V
VB = -1 V 15 45 30
TPIxx
LINE A
LINE B
LINE A
LINE B
CA
CB
Figure 3. Pulse waveform (10/1000 µs) Figure 4. Surge peak current versus overload
duration
10 0
50
%I
PP
t
t
rp
0t
1E-2 1E-1 1E+0 1E+1 1E+2 1E+3
0
1
2
3
4
5
6
7
8
9
10
I (A)TSM
F=50Hz
Tj initial=25°C
t(s)
Characteristics TPI
4/9
Figure 5. Reference test circuit 1
Figure 6. Functional holding current (IH) test circuit 2
Auto
Transformer
220 V / 2 A
tp = 20 ms
R2
R1
140 Ω
240 Ω
Static
relay
IBO,I
H
measure
VBO
measure
VOUT D.U.T.
K
220 V
Transformer
220 V / 800 V
2 A
TEST PROCEDURE
Pulse test duration (tp = 20 ms):
V selection:
●
●
●
●
for Bidirectional devices = Switch K is closed
for Unidirectional devices = Switch K is open
Device with V < 200 V V = 250 V , R1 = 140
OUT
BO OUT RMS
➔Ω
Device with V > 200 V V = 480 V , R2 = 240
BO OUT RMS
➔Ω
R
-V
P
V
BAT = - 48 V
Surge generator
D.U.T.
TEST PROCEDURE
1/ Adjust the current level at the IH value by short circuiting the AK of the D.U.T.
2/ Fire the D.U.T. with a surge current ➔I10 A, 10/1000 µs.
3/ The D.U.T. will come back off-state within 50 ms maximum.
PP
This is a GO-NOGO test which allows to confirm the holding current (I ) level in a
functional test circuit.
H
TPI Application information
5/9
2 Application information
Figure 7. Application circuit - U interface protection
Figure 8. Application circuit - S interface protection
This component uses an intemal structure resulting in symetrical characteristics with a good
balanced behaviour. Its topology ensures the same breakdown voltage level for positive and
negative surges in differential and common mode.
A
B
TPIxx
R or PTC
R or PTC
GND
A
B
A
B
TPIxx
TPIxx
R or PTC
R or PTC
R or PTC
R or PTC
GND
GND
Ordering information scheme TPI
6/9
Figure 9. Connections
3 Ordering information scheme
Figure 10. Ordering information scheme
Tip Tip
1IN OUT
IN OUT
8
27
36
45
GND GND
Ring Ring
1. Connect pins 2, 3, 6 and 7 to
ground in order to guarantee a
good surge current capability for
long duration disturbances.
2. To take advantage of the
“4-point” structure of the
TPIxxxN, the Tip and Ring lines
have to cross the device. In this
case, the device will eliminate the
overvoltages generated by the
parasitic inductances of the
wiring (LdI/dt), especially for very
fast transients.
TPI 80 1 1 N RL
Bidirectional Tripolar Protection
Breakdown voltage
Version
Package
Revision
Packing mode
80 = 80 V
1 = SO-8
RL = Tape and reel
Blank = Tube
TPI Package information
7/9
4 Package information
●Epoxy meets UL94, V0
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Figure 11. SO-8 footprint, dimensions in mm (inches)
Table 5. SO-8 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.069
A1 0.1 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
C 0.17 0.23 0.007 0.009
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
L1 1.04 0.041
k0° 8° 0° 8°
ppp 0.10 0.004
E1
D
8
4
1
5
E
e
A
A2
bA1
ppp C
C
k
h x 45°
L
L1
Seating
Plane
C
6.8
(0.268)
4.2
(0.165)
1.27
(0.050)
0.6
(0.024)
Ordering Information TPI
8/9
5 Ordering Information
6 Revision history
Table 6. Ordering information
Order code Marking Package Weight Base qty Delivery mode
TPI8011N TP80N
SO-8 0.08 g
100 Tube
TPI8011NRL (1)
1. Prefered device
TP80N 2500 Tape and reel
TPI12011N TP120N 100 Tube
TPI12011NRL (1) TP120N 2500 Tape and reel
Table 7. Document revision history
Date Revision Changes
August-2001 3A Last update.
02-Aug-2004 4 VBO dyn. (page 2) and capacitances (page 3) values update.
07-Nov-2007 5 Reformatted to current standards. Updated Package information.
TPI
9/9
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