TCM1030, TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS SCTS040A – JUNE 1989 – REVISED MAY 1996 D D D D D Meet or Exceed Bell Standard LSSGR Requirements Externally-Controlled Negative Firing Voltage . . . – 70 V Max Accurately Controlled, Wide Negative Firing Voltage Range . . . – 5 V to – 65 V Surge Current (see Note 1): TCM1030 TCM1060 10/1000 16 A 30 A 10/160 25 A 45 A 2/10 35 A 50 A High Holding Current – TCM1030 . . . 100 mA Min – TCM1060 . . . 150 mA Min D OR P PACKAGE (TOP VIEW) TIP VS NC RING 1 8 2 7 3 6 4 5 TIP GND GND RING NC – No internal connection The D package is available taped and reeled. Add R suffix (i.e., TCM1030DR). description The TCM1030 and TCM1060 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 TCM1060 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 TCM1060 are characterized for operation from – 40°C to 85°C. functional block diagram TIP 1 8 Trip Circuit D1 Q1 7 VS TIP GND 2 6 Trip Circuit GND Q2 D2 RING 4 5 RING 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. 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. Copyright 1996, Texas Instruments Incorporated 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TCM1030, TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS SCTS040A – JUNE 1989 – REVISED MAY 1996 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 TCM1060 nonrepetitive peak surge current (see Note 1): 10/1000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 A 10/160 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 45 A 2/10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 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 affect 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 2 TA ≤ 25°C POWER RATING OPERATING FACTOR ABOVE TA = 25°C TA = 85°C POWER RATING D 725 mW 5.8 mW/°C 377 mW P 1000 mW 8.0 mW/°C 520 mW POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TCM1030, TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS SCTS040A – JUNE 1989 – REVISED MAY 1996 electrical characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER VCF VC(R) II(trip) IH Forward clamping voltage (diode forward voltage) (see Note 3) Reverse clamping voltage (SCR on-state on state voltage) (see Note 3) Trip current (see Note 4) Holding current TEST CONDITIONS 2 1.2 2 4 2 4 IFM = 16-A transient IFM = 30-A transient 4 5 2.5 5 3.1 5 ITM = 1-A transient ITM = 10-A transient 1.2 2 1.2 2 2.5 4 2.5 4 ITM = 16-A transient ITM = 30-A transient 4 5 3 5 4.8 7 VS = – 50 V VS = – 50 V – 100 Standby current TIP and RING at – 85 V or GND, VS = – 85 V Critical rate of rise of off-state voltage (see Note 5) – 325 – 100 II(stby) dv/dt TCM1060 TYP† MAX 2.5 Trip voltage Off-state ((high g impedance)) capacitance MIN 1.2 VI(t I(trip) i ) Coff ff TCM1030 TYP† MAX IFM = 1-A transient IFM = 10-A transient VS = – 50 V, VS = – 65 V, Transient overshoot voltage MIN – 100 – 325 – 150 V V mA mA I = trip current – 50 – 55 – 50 – 55 I = trip current – 65 – 70 – 65 – 70 ±5 ±5 VS = – 50 V, tr = 10 ns TIP and RING at – 50 V 2.5 2.5 25 25 TIP and RING at GND 50 50 VS open, –1 –1 VS = – 50 V UNIT V µA V pF 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TCM1030, TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS SCTS040A – JUNE 1989 – REVISED MAY 1996 TYPICAL CHARACTERISTICS TIP OR RING CURRENT vs TIP OR RING TO GND VOLTAGE 0.5 0.4 VS = – 48 V TA = 25°C TIP or RING Current – A 0.3 0.2 0.1 0 – 0.1 – 0.2 – 0.3 – 0.4 – 0.5 – 50 – 40 – 30 – 20 – 10 0 10 20 30 40 50 Tip or Ring to GND Voltage – V 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 50 Ω for the TCM1060). 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 this from happening, the line feed current must be limited to the following conditions: * VRP t I R ) 2Rp H line V TP where VTP and VRP are the voltages on TIP and RING, respectively, of the TCM1030 or TCM1060. 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. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TCM1030, TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS SCTS040A – JUNE 1989 – REVISED MAY 1996 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. T Control Recieve Voice Subscriber Line Interface Circuit (SLIC) TP VBAT GND 1 2 RP Transmit Voice TIP 4 TIP TIP 8 7 TCM1030, GND TCM1060 6 VS GND 5 RING RING R RP (see Note A) RP (see Note A) RING 0.47 µF (see Note B) 0.1 µF (see Note C) 48 V NOTES: A. RP is 100 Ω minimum for TCM1030 and 50 Ω minimum for TCM1060. 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 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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