TRANSIENT VOLTAGE SUPPRESSORS FEATURES Up to 500W for imS Pulse Power Capability Clamping Time in Picoseconds Direct Applicability for all popular Microprocessors and IC families * Metaliurgically bonded assembly system to assure long term reliability @ Miniature glass encased hermetically sealed package ABSOLUTE MAXIMUM RATINGS @ 25C TVS305-TVS430 Stand-off Voltage, Va ..... 5 to 300V Peak Pulse Power (1MS)*.........cccc cece eee ne EE EE EE Ete 150W Forward Surge Current (8.3mS half sinewave) ............. ccc ccaseeee nec eeee eter eean tees 15A Peak Pulse Current ............0.ccceceeeeee een tenes See Table Breakdown Voltage .............0 cece eee cece rece e tne ne ener eeu n een ret teg eae ete See Table Power, Continuous ............. cece cee ne eee ener ECE EEE EEE EEO 3W Storage and Operating Termperature .........0.. cece ee ee eee eee eee nee ne es *See Figures 3 and 4 for Peak Pulse Power vs Pulse Duration. MECHANICAL SPECIFICATIONS TVS305-TVS430 TVS505-TVS528 DESCRIPTION Microsemis TVS series of transient voltage suppressors feature oxide passivated zener type chips with fullfaced metallurgical bonds on both sides to achieve high surge capability and negligible electrical degradation under repeated surge conditions. The series is especially useful in protecting microprocessor, MOS, CMOS, TTL, ECL,PL and linear integrated circuits from spurious transient disturbances. TVS505-TVS528 5.0V to 28.0V 500W becneens 50A . See Table . See Table 65 to +175C TVS305 Series BODY A BAND INDICATES CATHODE END 156 TYP. 3.9mm 085 MAX. 2.16mm co [ >__ 7 4 030 +.001 0.77mm +.03 .700 MIN. 250 MAX, 17.8mm 635mm" L_ Oe 1.625 MIN. 41.3mm > THESE DEVICES ALSO AVAILABLE IN SURFACE MOUNT PACKAGE. SEE SECTION 10 MECHANICAL SPECIFICATIONS TVS505 Series BODY B BAND INDICATES CATHODE END 175 TYP. 4.4mm 145 MAX. 3.68mm 1 cS B > = 4 040 +.001 1.02mm +.03 .975 MIN. .300 MAX, 24.8mni 7.62mni L_ 115 TYP. 2.9mm 2.30 MIN. 58.4mm THESE DEVICES ALSO AVAILABLE IN SURFACE MOUNT PACKAGE. SEE SECTION 10 Nic. rOlS, i Corp. Wi - Watertown The diode experts 2/80 417TVS 305-TVS 430 ELECTRICAL SPECIFICATIONS @ 25C TVS 505-TVS 528 Max. Stand Min. Max. Max. Max. Max. Clamping -Off Breakdown Leakage Peak Clamping Clamping Voltage* TVS Voltage Voltage Current Pulse Current* Voltage* Voltage* Ve @ Part No. Vp BV fin @ IMA I @V, lop Ve @ I, Ve @1A 5A 10A Vv v BA A Vv v Vv TVS305 5.0 6.0 50 7 87 _ _ TVS310 10.0 1.1 2 8.9 16.8 _ _ TVS312 12 138 1 71 21.0 - _ _ TVS315 15 16.7. 1 5.9 25 _ _ _ TVS318 18 20.4 1 49 31 _ _ _ TVS324 24 284 1 3.6 42 _ _ TVS328 28 30.7 1 3.2 46 _ _ _ TVS348 48 54 1 17 82 _ _ _ TVS360 60 67 1 14 105 _ TVS410 100 ill 1 O1 160 _ _ TVS420 200 234 1 42 360 _ TVS430 300 342 i 28 520 = = =_ TVS505 5.0 6.0 300 53.7 9.3 74 = 79 TVS510 10.0 112 5 30.3 16.5 13.2 144 TVS512 12.0 13.8 5 23.8 21.0 16.5 - 18.5 TVS515 15.0 16.7 5 19.8 25.2 19.7 ~ 22.2 TVSS18 18.0 20.4 5 16.3 30.5 23.8 26.0 - TVS524 24.0 28.4 5 11.9 42.0 32.4 37.0 _ TVS528 28.0 30.7 5 10.7 46.5 35.9 41.0 _ *For 1mS pulse: see Figure 1. 1. Pulse Waveform Derating Curve _ 100 Qo Zz \ g z = 2 75 o Nw 3 PULSE TIME DURATION (t,) = POINT 3 5 WHERE |, DECAYS TO 50% OF Ih, & Ww & 100 w 50 a] 8 & wy us a wy 3 al a 25 } 50 < 2 5 \ !-~_| | a 1 2 t TIME (ms) 580 PLEASANT STREET WATERTOWN, MA 02172 TEL. (617) 926-0404 FAX (617) 924-1235 3 4 4-18 50 100 TEMPERATURE ( 150 C) 200 PRINTED IN U.S.A.3. Peak Pulse Power vs. Pulse Duration TVS305-TVS430 TVS505-TVS528 4. Peak Pulse Power vs. Pulse Duration 10 t 100 , EXPONENTIAL EXPONENTIAL PULSE PULSE _ IN NX 21 SS = 10 NN a w w NQ = N\ = o oO a 9 ws uw wv ys % 4 > 2 IN NN ao = G1 NN & 1 NA 2 N I N < NX 01 a lps lus 10yS =: 1004S mS 1oms us lwS 10S 100xS = smS_s10mS PULSE TIME (t,) PULSE TIME (t,) 5. Capacitance vs. Stand-Off Voltage 6. Clamping Voltage vs. Pulse Current 10,000 100 1 WA 50. 5 40 uw 30 wd 8 = 20 = 5 $ = 1000 2 10 < a o = 1 $5 _ < a eo 3 > MEASURED @ V, 1 10 100 V, STAND-OFF VOLTAGE () 1 2 5 10 20 50 100 I, PULSE CURRENT (A) 580 PLEASANT STREET * WATERTOWN, MA 02172 TEL. (617) 926-0404 FAX (617) 924-1235 PRINTED IN U.S.A.TVS305-TVS430 TVS505-TVS528 CHOOSING AND SPECIFYING THE PROPER TVS The following terms are generally used in specitying Transient Voltage Suppressors (TVS): 1, Stand-off Voltage (V,) is the highest reverse voltage at which the TVS will be non-conducting. 2. Minimum Breakdown Voltage (BV min) is the reverse voltage at which the TVS conducts 1 milli-amp. This is the point where the TVS begins to limit the transient. 3. Maximum Clamping Voltage (Vc max) is the maximum voltage the TVS will allow during a transient spike. Figure 7 graphically shows all three terms. Reverse Current 1 I ! I \ + Figure 7 The three most important factors in choosing the appropriate TVS for an application in their order of importance are: 1. Pulse power (P,) Choose the TVS series that will handle the Transient Pulse Power. Transient Pulse Power is equal to the clamping voltage (Vc) times the peak pulse current (pp). The pulse duration vs. pulse power graph on the TVS data sheet can then be used to determine the maximum allowable pulse duration. (Figure 3 or 4). 2. Standoff voltage (V2) From the TVS series selected, choose the device with the stand-off voltage equal to or greater than the normal circuit operating voltage. 3. Maximum Clamping Voltage (Vemax) Determine the clamping voltage of the device chosen for the transient given and be sure it is below the voltage that might damage any components. 580 PLEASANT STREET * WATERTOWN, MA 02172 TEL. (617) 926-0404 + FAX (617) 924-1235 4-20 PRINTED INUS.A.