*R oH V SC AV ER OM AI SIO PL LA N IA BL S NT E TISP61521 DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS TISP61521 SLIC Protector Overvoltage Protection for High Voltage Negative Rail Ringing SLICs D Package (Top View) K1 (Tip) Dual Voltage-Programmable Protectors - Supports Battery Voltages Down to -150 V - Low 3 mA max. Gate Triggering Current - High 150 mA min. Holding Current (Gate) G Rated for International Surge Wave Shapes 1 8 K1 (Tip) 2 7 A (Ground) (Ground) NC 3 6 A (Ring) K2 4 5 K2 (Ring) MD6XANB Voltage Waveshape NC - No internal connection Terminal typical application names shown in parenthesis ITSP Standard A 2/10 GR-1089-CORE 170 1.2/50 ITU-T K.22 VDE 0878 50 1.2/50 IEC 61000-4-5 10/160 FCC Part 68 Type A 50 0.5/700 I3124 40 10/700 ITU-T K.20, VDE 0433 IEC 61000-4-5 40 Device Symbol K1 K1 100 A G A 9/720 FCC Part 68 Type B 40 10/560 FCC Part 68 Type A 35 10/1000 GR-1089-CORE 30 K2 K2 Terminals K1, K2 and A correspond to the alternative line designators of T, R and G or A, B and C. The negative protection voltage is controlled by the voltage, VGG, applied to the G terminal. SD6XAEB Functional Replacements for Device Type Package Type Functional Replacement ............................................ UL Recognized Components LCP1511D, 8-pin Small-Outline TISP61521D LCP1521 How To Order Device Package TISP61521 D (8-pin Small-Outline) Carrier For Standard Termination Finish Order As For Lead Free Termination Finish Order As Embossed Tape Reeled TISP 61521DR TISP 61521DR-S Tube TISP615 21D TISP615 21D-S Description The TISP61521 is a dual forward-conducting buffered p-gate overvoltage protector. It is 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 TISP61521 limits voltages that exceed the SLIC supply rail voltage. The TISP61521 parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 1 and ITU-T recommendation K.20. *RoHS Directive 2002/95/EC Jan 27 2003 including Annex APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector Description (continued) The SLIC line driver section is typically powered from 0 V (ground) and a negative voltage in the region of -20 V to -150 V. 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 will switch into a low voltage on-state condition. As the overvoltage subsides, the high holding current of TISP61521 crowbar prevents d.c. latchup. These monolithic protection devices are fabricated in ion-implanted planar vertical power structures for high reliability and in normal system operation they are virtually transparent. The TISP61521 buffered gate design reduces the loading on the SLIC supply during overvoltages caused by power cross and induction. The TISP61521 is available in an 8-pin plastic small-outline surface mount package. Absolute Maximum Ratings, TJ = 25 °C (Unless Otherwise Noted) Rating Symbol Value Unit Repetitive peak off-state voltage, VGK = 0, -40 °C ≤ TJ ≤ 85 °C (see Note 1) VDRM -175 V Repetitive peak gate-cathode voltage, VKA = 0, -40 °C ≤ TJ ≤ 85 °C (see Note 1) Non-repetitive peak on-state pulse current (see Note 2) VGKRM -162 V 2/10 µs (GR-1089-CORE, 2/10 µs voltage waveshape) 170 1/20 µs (K.22, VDE0878, 1.2/50 voltage waveshape) 50 8/20 µs (IEC 61000-4-5, combination wave generator, 1.2/50 voltage, 8/20 current) 100 10/160 µs (F CC Part 68, 10/160 µs voltage waveshape) 0.2/310 µs (I3124, 0.5/700 µs voltage waveshape) 50 ITSP 40 5/310 µs (VDE 0433, 10/700 µs voltage waveshape) 40 5/310 µs (I TU-T K.20/21, K.44 10/700 µs voltage wave shape) 40 5/320 µs (F CC Part 68, 9/720 µs voltage waveshape) 40 10/560 µs (F CC Part 68, 10/560 µs voltage waveshape) 35 10/1000 µs (GR-1089-CORE, 10/1000 µs voltage waveshape) 30 A Non-repetitive peak on-state current, 50 Hz (see Notes 2 and 3) 0.01 s ITSM 1s Non-repetitive peak gate current, 10 ms half-sine wave, cathodes commoned (see Notes 1 and 2) 15 A 5 IGSM +2 A Junction temperature TJ -40 to +150 °C Storage temperature range Tstg -65 to +150 °C NOTES: 1. These voltage ratings are set by the -150 V maximum supply voltage plus the 12 V diode overshoot (VGKRM) and the 25 V SCR overshoot (V DRM). 2. Initially, the protector must be in thermal equilibrium. The surge may be repeated after the device returns to its initial conditions. 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). 3. Values for VGG = -48 V. For values at other voltages, see Figure 2. APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector Recommended Operating Conditions Component C1 RS Gate decoupling capacitor Min Typ 100 220 Max Unit nF series resistor for GR-1089-CORE, 2/10, 10/360 and 10/1000 first-level surge survival 25 Ω series resistor for GR-1089-CORE, 2/10, 10/360 and 10/1000 first-level and 2/10 second-level surge survival 40 Ω series resistor for K.20, K.21 and K.45 coordination with a 400 V primary protector 10 Ω series resistor for K.44 4 kV 10/700 surge survival 60 Ω series resistor for FCC Part 68 Type A 10/160 and 10/560 surge survival 20 Ω series resistor for FCC Part 68 Type B 9/720 surge survival 0 Ω series resistor for VDE 0433 2 kV 10/700 surge survival 10 Ω series resistor for VDE 0878 2 kV 1.2/50 surge survival 0 Ω series resistor for IEC 6100-4-5 4 kV, 10/700, class 5, long distance balanced circuits surge survival with a 400 V primary protector 10 Ω series resistor for IEC 6100-4-5 1.2/50-8/20 combination generator, classes 0 to 5 (500 V to 4 kV maximum), short distance balanced circuits surge survival. 0 Ω Electrical Characteristics, TJ = 25 °C (Unless Otherwise Noted) Parameter ID Off-state current Test Conditions V D = VDRM , VGK = 0 Min Typ Max Unit TJ = 25 °C -5 µA TJ = 85 °C -50 µA VGG = -48 V, CG = 220 nF 10/700, I TM = -30 A, R S = 10 Ω 1.2/50, I TM = -30 A, R S = 10 Ω 2/10, I TM = -38 A, R S = 62 Ω, 7 10 25 Forward voltage I F = 5 A, tw = 500 µs 2 V Peak forward recovery voltage 10/700, I F = 30 A, RS = 10 Ω 1.2/50, I F = 30 A, RS = 10 Ω 2/10, I F = 38 A, RS = 62 Ω, 5 7 12 V Holding current I T = -1 A, di/dt = 1A/ms, V GG = -100 V IGKS Gate reverse current VGG = VGK = VGKRM, VKA = 0 IGT Gate trigger current VGT Gate-cathode trigger voltage CKA Cathode-anode offstate capacitance f = 1 MHz, V d = 1 V, IG = 0, (see Note 4) Gate-cathode impulse VGK(BO) breakover voltage VF VFRM IH -150 V mA TJ = 25 °C -5 µA TJ = 85 °C -50 µA I T = -3 A, t p(g) ≥ 20 µs, VGG = -100 V 3.0 mA IT = -3 A, t p(g) ≥ 20 µs, VGG = -100 V 2.0 V VD = -3 V 100 pF VD = -48 V 50 pF NOTE 4: 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. APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector Thermal Characteristics Parameter RθJA Test Conditions Min Typ TA = 25 °C, EIA/JESD51-3 PCB, EIA /JESD512 environment, PTOT = 1.7 W Junction to free air thermal resistance Max Unit 170 °C/W Parameter Measurement Information +i IFSP (= | Quadrant I |) TSP Forward Conduction Characteristic IFSM (= |ITSM|) IF VF V GK(BO) V GG -v VD ID +v I I(BO) IH IS V(BO) VS VT IT ITSM Quadrant III ITSP Switching Characteristic -i Figure 1. Voltage-Current Characteristic Unless Otherwise Noted, All Voltages are Referenced to the Anode APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. PM6XAAA TISP61521 SLIC Protector Thermal Information PEAK NON-RECURRING AC vs CURRENT DURATION ITSM — Peak Non-Recurrent 50 Hz Current — A 20 TI61AF RING AND TIP TERMINALS: Equal ITSM values applied simultaneously GROUND TERMINAL: Current twice I TSM value 15 10 8 7 6 5 4 EIA / JEDSD51 Environment and PCB, T A = 25 ° C 3 VGG = -80 V VGG = -60 V 2 1.5 1 0.8 0.7 0.6 0.5 0.01 VGG = -100 V VGG = -120 V 0.1 1 10 100 t — Current Duration — s 1000 Figure 2. Non-Repetitive Peak On-State Current against Duration APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector APPLICATIONS INFORMATION 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 driver supply voltage 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 VBATH supply, Figure 3. This gated (programmable) protection arrangement minimizes the voltage stress on the SLIC, no matter what value of supply voltage. SLIC PROTECTOR IK IF Th5 TISP 61521 C1 220 nF SLIC PROTECTOR SLIC SLIC Th5 TISP 61521 IG V BAT AI6XABA Figure 3. Negative Overvoltage Condition C1 220 nF V BAT AI6XACA Figure 4. Positive Overvoltage Condition Operation of Gated Protectors Figure 3 and Figure 4 show how the TISP61521 limits negative and positive overvoltages. Positive overvoltages (Figure 4) are clipped by the antiparallel diode of Th5 and the resulting current is diverted to ground. Negative overvoltages (Figure 3) are initially clipped close to the SLIC negative supply rail value (VBATH). If sufficient current is available from the overvoltage, then Th5 will switch into a low voltage on-state condition. As the overvoltage subsides, the high holding current of Th5 prevents d.c. latchup. The protection voltage will be the sum of the gate supply (VBATH) and the peak gate-cathode voltage (V GK(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 6. Figure 5, which has a 10 A/µs rate of impulse current rise, shows a positive gate charge (QGS) of about 0.1 µC. With the 0.1 µF gate decoupling capacitor used, the increase in gate supply is about 1 V (= Q GS/C1). This change is just visible on the -72 V gate voltage, VBATH. But the voltage increase does not directly add to the protection voltage, as the supply voltage change reaches a maximum at 0.4 µs, when the gate current reverses polarity, and the protection voltage peaks earlier at 0.3 µs. In Figure 5, the peak clamping voltage (V(BO)) is -77.5 V, an increase of 5.5 V on the nominal gate supply voltage. This 5.5 V increase is the sum of the supply rail increase at that time, (0.5 V), and the protection circuit’s cathode diode to supply rail breakover voltage (5 V). In practice, use of the recommended 220 nF gate decoupling capacitor would give a supply rail increase of about 0.3 V and a V(BO) value of about -77.3 V. APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector 0 Voltage - V -20 VK -40 VBATH -60 -80 0.0 0.5 1.0 1.5 Time - µs AI6XD E 1 QGS IG -1 -2 IK -A Current - A 0 -3 -4 -5 0.0 0.5 1.0 1.5 Time - µs Figure 5. Protector Fast Impulse Clamping and Switching Waveforms Application Circuit Figure 6 shows a typical TISP61521 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. Resistors will reduce the prospective current from the surge generator for both the TISP61521 and the ring/test 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 TISP61521 protector. The protector gate reference voltage comes from the SLIC negative supply (VBATH). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses. APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector OVERCURRENT PROTECTION TIP WIRE RING/TEST PROTECTION TEST RELAY RING RELAY Th1 RSA SLIC RELAY S3a S1a SLIC PROTECTOR SLIC Th4 S2a Th3 RING WIRE RSB Th5 Th2 TISP 3xxxF3 OR 7xxxF3 S3b S1b S2b TISP 61521 C1 220 n F TEST EQUIPMENT RING GENERATOR Figure 6. Typical Application Circuit APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. V BAT AI6XAA B TISP61521 SLIC Protector MECHANICAL DATA Device Symbolization Code Devices will be coded as follows: Device Symbolization Code TISP61521 61521 APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. TISP61521 SLIC Protector MECHANICAL DATA D008 Plastic Small-outline Package This small-outline package consists of a circuit mounted on a lead frame and encapsulated within a plastic compound. The compound will withstand soldering temperature with no deformation, and circuit performance characteristics will remain stable when operated in high humidity conditions. Leads require no additional cleaning or processing when used in soldered assembly. D008 8-pin Small Outline Microelectronic Standard Package MS-012, JEDEC Publication 95 4.80 - 5.00 (0.189 - 0.197) 5.80 - 6.20 (0.228 - 0.244) 8 7 6 5 1 2 3 4 INDEX 3.81 - 4.00 (0.150 - 0.157) 1.35 - 1.75 (0.053 - 0.069) 0.25 - 0.50 x 45 ° N0M (0.010 - 0.020) 7 ° NOM 3 Places 0.102 - 0.203 (0.004 - 0.008) 0.28 - 0.79 (0.011 - 0.031) DIMENSIONS ARE: NOTES: A. B. C. D. 0.36 - 0.51 (0.014 - 0.020) 8 Places Pin Spacing 1.27 (0.050) (see Note A) 6 places 4.60 - 5.21 (0.181 - 0.205) 4°±4° 7 ° NOM 4 Places 0.190 - 0.229 (0.0075 - 0.0090) 0.51 - 1.12 (0.020 - 0.044) MILLIMETERS (INCHES) Leads are within 0.25 (0.010) radius of true position at maximum material condition. Body dimensions do not include mold flash or protrusion. Mold flash or protrusion shall not exceed 0.15 (0.006). Lead tips to be planar within ±0.051 (0.002). APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. MDXX AAC TISP61521 SLIC Protector MECHANICAL DATA D008 Tape DImensions D008 Package (8-pin Small Outline) Single-Sprocket Tape 1.50 - 1.60 (.059 - .063) 3.90 - 4.10 (.154 - .161) 1.95 - 2.05 (.077 - .081) 7.90 - 8.10 (.311 - .319) 0.40 (0.016) 0.8 MIN. (0.03) 5.40 - 5.60 (.213 - .220) 6.30 - 6.50 (.248 - .256) ø Carrier Tape Embossment DIMENSIONS ARE: 1.50 MIN. (.059) 11.70 - 12.30 (.461 - .484) Cover 0 MIN. Tape Direction of Feed 2.0 - 2.2 (.079 - .087) MILLIMETERS (INCHES) NOTES: A. Taped devices are supplied on a reel of the following dimensions:Reel diameter: MDXXATB 330 +0.0/-4.0 (12.992 +0.0/-.157) Reel hub diameter: 100 ± 2.0 (3.937 ± .079) Reel axial hole: 13.0 ± 0.2 (.512 ± .008) B. 2500 devices are on a reel. “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. APRIL 2001 REVISED FEBRUARY 2005 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.