NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TISP61089 Gated Protector Series
TISP61089D, TISP61089SD, TISP61089AD,
TISP61089ASD
DUAL FORWARD-CONDUCTING P-GATE THYRISTORS
PROGRAMMABLE OVERVOLTAGE PROTECTORS
How To Order
Overvoltage Protection for Negative Rail SLICs
Dual Voltage-Tracking Protectors
- ‘61089 for Battery Voltages to.......................................... -75 V
- ‘61089A for Battery Voltages to .....................................-100 V
- Low Gate Triggering Current ....................................... < 5 mA
- High Holding Current ............................................... > 150 mA
Rated for GR-1089-CORE and K.44 Impulses
Impulse Wave Shape IPPSM
A
Voltage Current
2/10 2/10 120
10/700 5/310 40
10/1000 10/1000 30
2/10 Overshoot Voltage Specified
Element IPP = 100 A, 2/10
V
Diode 8
SCR 12
Package Options
- Surface Mount 8-pin Small-Outline
Line Feed-Thru Connection (D)
Shunt Version Connection (SD)
..................................................... UL Recognized Components
D Package Top View and Device Symbol for Feed-Thru Pin-Out
SD6XAEB
G
K1
K2
K1
K2
A
A
D Package Top View and Device Symbol for Shunt (SD) Pin-Out
MD6XBE
NC - No internal connection
Terminal typical application names shown in
parenthesis
1
2
3
45
6
7
8NC
A
A
NC
G
K1
K2
NC
(Ground)
(Ground)
(Gate)
(Tip)
(Ring)
SD6XAU
G
K1
K2
A
A
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
*RoHS COMPLIANT
MD6XBDa
NC - No internal connection
Terminal typical application names shown in
parenthesis
1
2
3
45
6
7
8K1
A
A
K2
G
K1
K2
NC
(Ground)
(Ground)
(Gate)
(Tip)
(Ring)
(Tip)
(Ring)
Device Package Carrier Device Package Carrier
TISP61089 D (Small-Outline) R† TISP61089A D (Small-Outline) R†
TISP61089S D (Small-Outline) R† TISP61089AS D (Small-Outline) R†
TISP61089DR-S
TISP61089SDR-S
TISP61089ADR-S
TISP61089ASDR-S
† Carrier R is Embossed Tape Reeled † Carrier R is Embossed Tape Reeled
Order As Order As
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TISP61089 Gated Protector Series
Absolute Maximum Ratings, -40 °C ≤ TJ ≤ 85 °C (Unless Otherwise Noted)
Description
These ‘61089 parts are all dual forward-conducting buffered p-gate thyristor (SCR) overvoltage protectors. They are designed to protect
monolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and
induction. The ‘61089 limits voltages that exceed the SLIC supply rail voltage. The ‘61089 parameters are specified to allow equipment
compliance with Telcordia (formally Bellcore) GR-1089-CORE and ITU-T recommendations K.20, K.21 and K.45.
The SLIC line driver section is typically powered from 0 V (ground) and a negative (battery) voltage. The protector gate is connected to this
negative supply. This references the protection (clipping) voltage to the negative supply voltage. The protection voltage will then track the
negative supply voltage and the overvoltage stress on the SLIC is minimized.
Positive overvoltages are clipped to ground by diode forward conduction. Negative overvoltages are initially clipped close to the SLIC
negative supply rail value. If sufficient current is available from the overvoltage, then the protector SCR will switch into a low voltage on-state
condition. As the overvoltage subsides the high holding current of ‘61089 SCR helps prevent d.c. latchup.
The ‘61089 is intended to be used with a series resistance of at least 25 Ω and a suitable overcurrent function for Telcordia compliance. Power
fault conditions require a series overcurrent element which either interrupts or reduces the circuit current before the ‘61089 current rating is
exceeded. For equipment compliant to ITU-T recommendations K.20 or K.21 or K.45 only, the series resistor value is set by the coordination
requirements. For coordination with a 400 V limit GDT, a minimum series resistor value of 10 Ω is recommended.
The ‘61089 buffered gate design reduces the loading on the SLIC supply during overvoltages caused by power cross and induction. The
regular pin-out for surface mount and through-hole packages is a feed through configuration. Connection to the SLIC is made via the ‘61089,
Ring through pins 4 - 5 and Tip through pins 1 - 8. A non-feed-through surface mount (D) package is available. This shunt (SD) version pin-out
does not make duplicate connections to pin 5 and pin 8 which increases package creepage distance from ground of the other connections
from about 0.7 mm to over 3 mm. High voltage ringing SLICs, with battery voltages below -100 V and down to -155 V, can be protected by the
TISP61089B device. Details of this device are in the TISP61089B data sheet.
Rating Symbol Value Unit
Repetitive peak off-state voltage, V
GK
=0 61089
‘61089A V
DRM
-100
-120 V
Repetitive peak gate-cathode voltage, V
KA
=0 61089
‘61089A V
GKRM
-85
-120 V
Non-repetitive peak on-state pulse current (see Notes 1 and 2)
I
PPSM
A
10/1000 µs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4)
5/320 µs (ITU-T K.20, K.21& K.45, K.44 open-circuit voltage wave shape 10/700 µs)
1.2/50 µs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4)
2/10 µs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4)
30
40
100
120
Non-repetitive peak on-state current, V
GG
= -75 V, 50 Hz to 60 Hz (see Notes 1 and 2)
I
TSM
A
0.1 s 11
1 s
5 s
300 s
900 s
4.8
2.7
0.95
0.93
Non-repetitive peak gate current, 1/2 µs pulse, cathodes commoned (see Notes 1 and 2) I
GSM
+40 A
Operating free-air temperature range T
A
-40 to +85 °C
Junction temperature T
J
-40 to +150 °C
Storage temperature range T
stg
-40 to +150 °C
NOTES: 1. Initially the protector must be in thermal equilibrium with -40 °C ≤ T
J
≤ 85 °C. The surge may be repeated after the device returns
to its initial conditions. Gate voltage ranges are -20 V to -75 V for the ‘61089 and -20 V to -100 V for the ‘61089A.
2. The rated current values may be applied either to the Ring to Ground or to the Tip to Ground terminal pairs. Additionally, both
terminal pairs may have their rated current values applied simultaneously (in this case the Ground terminal current will be twice
the rated current value of an individual terminal pair). Above 85 °C, derate linearly to zero at 150 °C lead temperature.
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TISP61089 Gated Protector Series
Recommended Operating Conditions
Component Min Typ Max Unit
CGGate decoupling capacitor 100 220 nF
RS
Series resistor for GR-1089-CORE first-level surge survival 25 Ω
Series resistor for GR-1089-CORE first-level and second-level surge survival 40 Ω
Series resistor for GR-1089-CORE intra-building port surge survival 8 Ω
Series resistor for K.20, K.21 and K.45 coordination with a 400 V primary protector 10 Ω
Electrical Characteristics, TJ = 25 °C (Unless Otherwise Noted)
Parameter Test Conditions Min Typ Max Unit
IDOff-state current VD=V
DRM, VGK =0 TJ= 25 °C-5µA
TJ= 85 °C-50µA
V(BO) Breakover voltage
2/10 µs, IPP = -56 A, RS = 45 Ω, VGG = -48 V, CG = 220 nF
2/10 µs, IPP = -100 A, RS = 50 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = -53 A, RS = 47 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = -96 A, RS = 52 Ω, VGG = -48 V, CG = 220 nF
-57
-60
-60
-64
V
VGK(BO) Gate-cathode impulse
breakover voltage
2/10 µs, IPP = -56 A, RS = 45 Ω, VGG = -48 V, CG = 220 nF
2/10 µs, IPP = -100 A, RS = 50 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = -53 A, RS = 47 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = -96 A, RS = 52 Ω, VGG = -48 V, CG = 220 nF
9
12
12
16
V
VFForward voltage IF=5A, t
w=200µs3V
VFRM Peak forward recovery
voltage
2/10 µs, IPP = 56 A, RS = 45 Ω, VGG = -48 V, CG = 220 nF
2/10 µs, IPP = 100 A, RS = 50 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = 53 A, RS = 47 Ω, VGG = -48 V, CG = 220 nF
1.2/50 µs, IPP = 96 A, RS = 52 Ω, VGG = -48 V, CG = 220 nF
6
8
8
12
V
IHHolding current IT= -1 A, di/dt = 1A/ms, VGG =-48V -150 mA
IGKS Gate reverse current VGG =V
GK =V
GKRM, VKA =0 TJ= 25 °C-5µA
TJ= 85 °C-50µA
IGT Gate trigger current IT=-3A, t
p(g) ≥20 µs, VGG =-48V 5 mA
VGT Gate-cathode trigger
voltage IT=-3A, t
p(g) ≥20 µs, VGG = -48 V 2.5 V
QGS Gate switching charge 1.2/50 µs, IPP = -53 A, RS = 47 Ω, VGG = -48 V, CG = 220 nF 0.1 µC
CKA Cathode-anode off-
state capacitance f=1MHz, V
d=1V, I
G= 0, (see Note 3) VD= -3 V 100 pF
VD=-48V 50 pF
NOTES: 3. These capacitance measurements employ a three terminal capacitance bridge incorporating a guard circuit. The unmeasured
device terminals are a.c. connected to the guard terminal of the bridge.
Thermal Characteristics
Parameter Test Conditions Min Typ Max Unit
RθJA Junction to free air thermal resistance
TA = 25 °C, EIA/JESD51-3
PCB, EIA/JESD51-2
environment, PTOT = 1.7 W D Package 120 °C/W
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Parameter Measurement Information
TISP61089 Gated Protector Series
Figure 1. Voltage-Current Characteristic
Unless Otherwise Noted, All Voltages are Referenced to the Anode
-v V
GG
I
H
I
T
I
TSM
I
PPSM
V
(BO)
I
D
Quadrant I
Forward
Conduction
Characteristic
+v
+i
I
F
V
F
I
FSM
(= |I
TSM
|)
I
PPSM
-i
Quadrant III
Switching
Characteristic
PM6XAAC
V
GK(BO)
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Figure 2. Non-repetitive Peak On-State Current against Duration
(Gate Voltage Ranges are -20 V to -75 V for the '61089 and -20 V to -100 V for the '61089A)
PEAK NON-RECURRING AC
vs
CURRENT DURATION
t — Current Duration — s
0.01 0.1 1 10 100 1000
I
TSM
— Peak Non-Recurrent 50 Hz Current — A
0.5
0.6
0.7
0.8
1.5
2
3
4
5
6
7
8
15
20
1
10
EIA /JESD51
Environment and
PCB, T
A
= 25 °C
TI61AFA
V
GG
= -100 V
V
GG
= -60 V
V
GG
= -80 V
RING AND TIP TERM INALS:
Equal I
TSM
values applied
simultaneously
GROUND TERM INAL:
Current twice I
TSM
value
Thermal Information
TISP61089 Gated Protector Series
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
APPLICATIONS INFORMATION
TISP61089 Gated Protector Series
Gated Protectors
This section covers three topics. First, it is explained why gated protectors are needed. Second, the voltage limiting action of the protector is
described. Third, an example application circuit is described.
Purpose of Gated Protectors
Fixed voltage thyristor overvoltage protectors have been used since the early 1980s to protect monolithic SLICs (Subscriber Line Interface
Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. As the SLIC was usually powered
from a fixed voltage negative supply rail, the limiting voltage of the protector could also be a fixed value. The TISP1072F3 is a typical example
of a fixed voltage SLIC protector.
SLICs have become more sophisticated. To minimize power consumption, some designs automatically adjust the supply voltage, VBAT, to a
value that is just sufficient to drive the required line current. For short lines the supply voltage would be set low, but for long lines, a higher
supply voltage would be generated to drive sufficient line current. The optimum protection for this type of SLIC would be given by a protection
voltage which tracks the SLIC supply voltage. This can be achieved by connecting the protection thyristor gate to the SLIC supply, Figure 3.
This gated (programmable) protection arrangement minimizes the voltage stress on the SLIC, no matter what value of supply voltage.
Figure 3. ‘61089 Buffered Gate Protector
RSa
RING
WIRE
TIP
WIRE SLIC
'61089
V
BAT
C1
220 nF
AI6XAGB
AC
GENERATOR
0 - 600 V rms
SWITCHING MODE
POWER SUPPLY
GENERATOR
SOURCE
RESISTANCE
I
BAT
I
G
I
SLIC
C2
D1
Tx
Th4
Th5
40
600
600
RSb
40
Operation of Gated Protectors
Figures 4 and 5 show how the ’61089 device limits negative and positive overvoltages. Positive overvoltages (Figure 5) are clipped by the
antiparallel diodes in the ’61089 protector and the resulting current is diverted to ground. Negative overvoltages (Figure 4) are initially clipped
close to the SLIC negative supply rail value (VBAT). If sufficient current is available from the overvoltage, then the protector (Th5) will crowbar
into a low voltage on-state condition. As the overvoltage subsides the high holding current of the crowbar prevents d.c. latchup. The
protection voltage will be the sum of the gate supply (VBAT) and the peak gate-cathode voltage (VGK(BO)). The protection voltage will be
increased if there is a long connection between the gate decoupling capacitor, C1, and the gate terminal. During the initial rise of a fast
impulse, the gate current (IG) is the same as the cathode current (IK). Rates of 70 A/µs can cause inductive voltages of 0.7 V in 2.5 cm of
printed wiring track. To minimize this inductive voltage increase of protection voltage, the length of the capacitor to gate terminal tracking
should be minimized. Inductive voltages in the protector cathode wiring will also increase the protection voltage. These voltages can be
minimized by routing the SLIC connection through the protector as shown in Figure 3.
Application Circuit
Figure 6 shows a typical ’61089 part SLIC card protection circuit. The incoming line conductors, Ring (R) and Tip (T), connect to the relay
matrix via the series overcurrent protection. Fusible resistors, fuses and positive temperature coefficient (PTC) thermistors can be used for
overcurrent protection. Resistors will reduce the prospective current from the surge generator for both the ’61089 device and the ring/test
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
APPLICATIONS INFORMATION
TISP61089 Gated Protector Series
Application Circuit (Continued)
protector. The TISP7xxxF3 protector has the same protection voltage for any terminal pair. This protector is used when the ring generator
configuration may be ground or battery-backed. For dedicated ground-backed ringing generators, the TISP3xxxF3 gives better protection as
its inter-conductor protection voltage is twice the conductor to ground value.
Relay contacts 3a and 3b connect the line conductors to the SLIC via the ’61089 protector. The protector gate reference voltage comes from
the SLIC negative supply (VBAT). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses.
Figure 4. Negative Overvoltage Condition
C1
220 nF
I
G
Th5
SLIC
V
BAT
SLIC
PROTECTOR
'61089
I
K
AI6XAHC
Figure 5. Positive Overvoltage Condition
Th5
SLIC
V
BAT
SLIC
PROTECTOR
'61089
C1
220 nF
I
F
AI6XAIC
Figure 6. Typical Application Circuit
TEST
RELAY RING
RELAY SLIC
RELAY
TEST
EQUIP-
MENT RING
GENERATOR
S1a
S1b
RSa
RSb
RING
WIRE
TIP
WIRE Th1
Th2
Th3
Th4
Th5
SLIC
SLIC
PROTECTOR
RING/TEST
PROTECTION
OVER-
CURRENT
PROTECTION
S2a
S2b
'61089TISP
3xxxF3
OR
7xxxF3
S3a
S3b
VBAT
C1
220 nF
AI6XAJC
NOVEMBER 1995 - REVISED JULY 2008
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Device Symbolization Code
TISP61089 Gated Protector Series
MECHANICAL DATA
Devices will be coded as below.
Device Symbolization Code
TISP61089DR-S P61089
TISP61089SDR-S 61089S
TISP61089ADR-S 61089A
TISP61089ASDR-S 1089AS
“TISP” is a trademark of Bourns, Ltd., a Bourns Company, and is Registered in U.S. Patent and Trademark Office.
“Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries.
