TISP61089B Bourns, Inc., TISP61089B Datasheet
TISP61089B
Available stocks
Related parts for TISP61089B
TISP61089B Summary of contents
Page 1
... D (8 Smal l - Outl Description The TISP61089B is a dual forward-conducting buffered p-gate thyristor (SCR) overvoltage protector 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 TISP61089B limits voltages that exceed the SLIC supply rail voltage. The TISP61089B parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 2 and ITU-T recommendations K ...
Page 2
... As the overvoltage subsides, the high holding current of TISP61089B SCR prevents d.c. latchup. The TISP61089B is intended to be used with a series combination Ω or higher resistance and a suitable overcurrent protector. Power fault compliance requires the series overcurrent element to open-circuit or become high impedance (see Applications Information). 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 ...
Page 3
... TISP61089B series resistor for GR-1089-CORE first-level surge survival TISP61089B series resistor for GR-1089-CORE first-level and second-level surge survival R TISP61089B series resistor for GR-1089-CORE intra-building port surge survival S TISP61089B series resistor for K.20, K.21 and K.45 coordination with a 400 V primary protector Electrical Characteristics Parameter I ...
Page 4
... TISP61089B High Voltage Ringing SLIC Protector Parameter Measurement Information V GK(BO (BO (BO) Quadrant III Switching Characteristic Unless Otherwise Noted, All Voltages are Referenced to the Anode OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. ...
Page 5
... TISP61089B High Voltage Ringing SLIC Protector Thermal Information PEAK NON-RECURRING AC vs CURRENT DURATION 20 RING AND TIP TERMINALS: 15 Equal I simultaneously 10 GROUND TERMINAL: 8 Current twice 1 -100 V 0.8 GG 0.7 0 -120 V GG 0.5 0.01 0 — Current Duration — s Figure 2. Non-Repetitive Peak On-State Current against ...
Page 6
... TISP61089B High Voltage Ringing SLIC Protector Operation of Ringing SLICs using Multiple Negative Voltage Supply Rails Figure 4 shows a typical powering arrangement for a multi-supply rail SLIC. V BATL is a lower (smaller) voltage supply than V BATH . With supply switch S1 in the position shown, the line driver amplifiers are powered between 0 V and V BATL . This mode minimizes the power consumption for short loop transmission ...
Page 7
... Gated Protectors This section covers four topics. First explained why gated protectors are needed. Second, the voltage limiting action of the protector is described. Third, how the withstand voltages of the TISP61089B junctions are set. Fourth, 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 ...
Page 8
... Figure 7. Negative Overvoltage Condition Operation of Gated Protectors Figure 7 and Figure 8 show how the TISP61089B limits negative and positive overvoltages. Positive overvoltages (Figure 8) are clipped by the antiparallel diode of Th5 and the resulting current is diverted to ground. Negative overvoltages (Figure 7) are initially clipped close to the SLIC negative supply rail value (V ) ...
Page 9
... B (G). The following junctions are subject to voltage stress: Transistor EB and CB, SCR AK (off state) and the antiparallel diode (reverse blocking). This clause covers the necessary testing to ensure the junctions are good. Testing transistor CB and EB: The maximum voltage stress level for the TISP61089B is V diode voltage overshoot, V ...
Page 10
... TISP61089B High Voltage Ringing SLIC Protector Gated Protectors (Continued) Testing transistor CB, SCR AK off state and diode reverse blocking: The highest AK voltage occurs during the overshoot period of the protector. To make sure that the SCR and diode blocking junctions do not break down during this period, a d.c. test for off-state current, I can be applied at the overshoot voltage value ...
Page 11
... TISP61089B High Voltage Ringing SLIC Protector Application Circuit Figure 12 shows a typical TISP61089B 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) resistors can be used for overcurrent protection ...
Page 12
... TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.5 - Test Generators (Continued) The exception to these two conditions of independence and limit waveshape values is the alternative IEEE C.62.41, 1.2/50-8/20 combination wave generator which may be used for testing in ‘1089 Sections 4.5.7, 4.5.8 and 4.5.9. Here, the quoted waveshape values are nominal with defined tolerance. The open-circuit voltage waveshape is 1.2 µ ...
Page 13
... TISP61089B with survive this test. The 25 Ω value second-level conditions, the peak current will be 2x143 A, which may result in failure of the 2x120 A rated TISP61089B. However, if the testing is done at or near 25 °C, the TISP61089B will survive with an R Open-circuit ...
Page 14
... OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. values of 8 Ω, 25 Ω and 40 Ω. The listed currents are lower than the TISP61089B current rating of S Table 3. Intra-building Lightning Surge Currents ...
Page 15
... RMS Voltage s V 900 0 to 600 ‘1089 Section 4.5.12 - First-Level Power Fault Testing Table 5 shows the nine tests used for this section. The TISP61089B will survive these peak current values as they are lower than the TISP61089B current-time ratings. Open-circuit Test AC Duration RMS Voltage ...
Page 16
... Section 4.5.11 is replaced by a one-foot section of 26 AWG wrapped in cheesecloth. The equipment fails if an open circuit occurs or the cheesecloth is damaged. Table 7 shows the test conditions for this section. Columns 7 and 8 show the prospective currents using R TISP61089B to survive, the series overcurrent protection to operate before the TISP61089B current-time ratings are exceeded. Open-circuit Short-circuit ...
Page 17
... To meet ‘1089, the overcurrent protection must be coordinated with the requirements of Sections 4.5.7, 4.5.8, 4.5.9, 4.5.12, 4.5.13, 4.5.15 and the TISP61089B. The overcurrent protection must not fail in the first-level tests of Sections 4.5.7, 4.5.9 and 4.5.12 (tests 1 through 5). Test 6 through 9 of Section 4.5.12 are not requirements. The test current levels and their duration are shown in Figure 18. First-level tests have a high source resistance and the current levels are not strongly dependent on the TISP61089B series resistor value ...
Page 18
... To keep the 2/10 current below 120 A, an increase of the PTC thermistor d.c. resistance value to 50 Ω or more may be needed. In controlled temperature environments, where the temperature does not drop below freezing, the TISP61089B 2/10 capability is about 170 A, and this would allow a lower value of resistance. ...
Page 19
... TISP61089B High Voltage Ringing SLIC Protector Overcurrent and Overvoltage Protection Coordination (Continued) PEAK AC vs CURRENT DURATION Ceramic PTC Thermistor 2 1.5 1 First Level 0.8 Tests # 1 0.6 0.5 0.4 through 5, 0.3 25 Ω Ω Ω Ω & 40 Ω Ω Ω Ω 0.2 0.15 0.01 0 — Current Duration — s Figure 21 ...
Page 20
... TISP61089B High Voltage Ringing SLIC Protector Device Symbolization Code Devices will be coded as below. “TISP” trademark of Bourns, Ltd., a Bourns Company, and is Registered in U.S. Patent and Trademark Office. “Bourns” registered trademark of Bourns, Inc. in the U.S. and other countries. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice ...