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| TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 The SP723 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection of sensitive input circuits. The SP723 has 2 protection SCR/Diode device structures per input. There are a total of 6 available inputs that can be used to protect up to 6 external signal or bus lines. Over-voltage protection is from the IN (Pins 1 - 3 and Pins 5 - 7) to V+ or V-. The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ (Pin 8) or a -VBE diode threshold below V- (Pin 4). From an IN input, a clamp to V+ is activated if a transient pulse causes the input to be increased to a voltage level greater than one VBE above V+. A similar clamp to V- is activated if a negative pulse, one VBE less than V-, is applied to an IN input. Refer to Fig 1 and Table 1 for further details. Refer to Application Note AN9304 and AN9612 for further detail. Features * ESD Interface per HBM Standards - IEC 61000-4-2, Direct Discharge . . . . . . . . . . . . . . . . . 8kV (Level 4) - IEC 61000-4-2, Air Discharge . . . . . . . . . . . . . . . . . . 15kV (Level 4) - MIL-STD-3015.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25kV * Peak Current Capability - IEC 61000-4-5 8/20s Peak Pulse Current. . . . . . . . . . . . . . . . . 7A - Single Transient Pulse, 100s Pulse Width. . . . . . . . . . . . . . . . . . 4A * Designed to Provide Over-Voltage Protection - Single-Ended Voltage Range to . . . . . . . . . . . . . . . . . . . . . . . . +30V - Differential Voltage Range to. . . . . . . . . . . . . . . . . . . . . . . . . . . 15V * Fast Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2ns Risetime * Low Input Leakages . . . . . . . . . . . . . . . . . . . . . . . . 2nA at 25oC Typical Ordering Information PART NUMBER SP723AP SP723AB SP723ABT TEMP. RANGE (oC) -40 to 105 -40 to 105 -40 to 105 PACKAGE 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC Tape and Reel PKG. NO. E8.3 M8.15 M8.15 Min. Order Qty. 2000 1960 2500 Functional Diagram V+ 8 * Low Input Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5pF Typical * An Array of 6 SCR/Diode Pairs * Operating Temperature Range . . . . . . . . . . . . . . . . . . . . -40oC to 105oC Applications 3, 5-7 IN 1 IN 2 IN * Microprocessor/Logic Input Protection * Data Bus Protection * Analog Device Input Protection * Voltage Clamp V- 4 Pinout SP723 (PDIP, SOIC) TOP VIEW IN IN IN V1 2 3 4 8 7 6 5 V+ IN IN IN 240 w w w. l i t t e l f u s e . c o m TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 Absolute Maximum Ratings Continuous Supply Voltage, (V+) - (V-). . . . . . . . . . . . . . . . . . . . . . . . . +35V Forward Peak Current, IIN to VCC, IIN to GND (Refer to Figure 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A, 100s Peak Pulse Current, 8/20s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7A ESD Ratings and Capability (Figure 1, Table 1) Load Dump and Reverse Battery (Note 2) Thermal Information Thermal Resistance (Typical, Note 1) JA ( oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160 SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65oC to 150oC Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150oC Lead Temperature (Soldering 10s). . . . . . . . . . . . . .. . . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only) CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. JA is measured with the component mounted on an evaluation PC board in free air. Electrical Specification TA =40oC to 105oC, VIN = 0.5VCC, Unless Otherwise Specified 5 TVS DIODE ARRAYS ESD Capability ESD capability is dependent on the application and defined test standard.The evaluation results for various test standards and methods based on Figure 1 are shown in Table 1. The SP723 has a Level 4 HBM capability when tested as a device to the IEC 61000-4-2 standard. Level 4 specifies a required capability greater than 8kV for direct discharge and greater than 15kV for air discharge. For the "Modified" MIL-STD-3015.7 condition that is defined as an "incircuit" method of ESD testing, the V+ and V- pins have a return path to ground and the SP723 ESD capability is typically greater than 25kV from 100pF through 1.5k. By strict definition of MIL-STD-3015.7 using "pinto-pin" device testing, the ESD voltage capability is greater than 10kV. For the SP723 EIAJ IC121 Machine Model (MM) standard, the ESD capability is typically greater than 2kV from 200pF with no series resistance. TABLE 1. ESD TEST CONDITIONS STANDARD IEC 1000-4-2 (Level 4) TYPE/MODE HBM, Air Discharge HBM, Direct Discharge RD CD VD 330 150pF 15kV 330 150pF 8kV MIL-STD-3015.7 Modified HBM Standard HBM EIAJ IC121 Machine Model R1 CHARGE SWITCH CD H.V. SUPPLY VD RD 1.5k 100pF 25kV 1.5k 100pF 10kV 0k 200pF 2kV DISCHARGE SWITCH IN DUT IEC 1000-4-2: R 1 50 to 100M MIL-STD-3015.7: R 1 1 to 10M FIGURE 1. ELECTROSTATIC DISCHARGE TEST w w w. l i t t e l f u s e . c o m 241 TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 200 TA = 25oC SINGLE PULSE 5 TA = 25oC SINGLE PULSE 160 FORWARD SCR CURRENT (mA) FORWARD SCR CURRENT (A) 4 120 3 80 2 IFWD EQUIV. SAT. ON THRESHOLD ~ 1.1V VFWD 40 1 0 600 800 1000 1200 0 0 1 2 3 FORWARD SCR VOLTAGE DROP (V) FORWARD SCR VOLTAGE DROP (mV) FIGURE 2. LOW CURRENT SCR FORWARD VOLTAGE DROP CURVE +VCC FIGURE 3. HIGH CURRENT SCR FORWARD VOLTAGE DROP CURVE +VCC INPUT DRIVERS OR SIGNAL SOURCES LINEAR OR DIGITAL IC INTERFACE IN 1 - 3 IN 5 - 7 TO +VCC V+ SP723 V- SP723 INPUT PROTECTION CIRCUIT (1 OF 6 SHOWN) FIGURE 4. TYPICAL APPLICATION OF THE SP723 AS AN INPUT CLAMP FOR OVER-VOLTAGE, GREATER THAN 1VBE ABOVE V+ OR LESS THAN -1V BE BELOW V242 w w w. l i t t e l f u s e . c o m TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 Peak Transient Current Capability of the SP723 The peak transient current capability rises sharply as the width of the current pulse narrows. Destructive testing was done to fully evaluate the SP723's ability to withstand a wide range of peak current pulses vs time. The circuit used to generate current pulses is shown in Figure 5. The test circuit of Figure 5 is shown with a positive pulse input. For a negative pulse input, the (-) current pulse input goes to an SP723 `IN' input pin and the (+) current pulse input goes to the SP723 V- pin. The V+ to V- supply of the SP723 must be allowed to float. (i.e., It is not tied to the ground reference of the current pulse generator.) Figure 6 shows the point of overstress as defined by increased leakage in excess of the data sheet published limits. The maximum peak input current capability is dependent on the ambient temperature, improving as the temperature is reduced. Peak current curves are shown for ambient temperatures of 25oC and 105oC and a 15V power supply condition. The safe operating range of the transient peak current should be limited to no more than 75% of the measured overstress level for any given pulse width as shown in the curves of Figure 6. Note that adjacent input pins of the SP723 may be paralleled to improve current (and ESD) capability. The sustained peak current capability is increased to nearly twice that of a single pin. + VX R1 VARIABLETIME DURATION CURRENT PULSE GENERA TOR CURRENT SENSE (-) (+) 1 IN 2 IN 3 IN VOLTAGE PROBE R1 ~ 10 TYPICAL VX ADJ. 10V/A TYPICAL C1 ~ 100F 4 VSP723 V+ 8 IN 7 IN 6 IN 5 C1 + - - FIGURE 5. TYPICAL SP723 PEAK CURRENT TEST CIRCUIT WITH A VARIABLE PULSE WIDTH INPUT 5 CAUTION: SAFE OPERA TING CONDITIONS LIMIT THE MAXIMUM PEAK CURRENT FOR A GIVEN PULSE WIDTH TO BE NO GREATER THAN 75% OF THE VALUES SHOWN ON EACH CURVE. V+ TO V- SUPPLY = 15V 14 12 10 8 6 4 2 0 0.001 TA = 105oC TA = 25oC PEAK CURRENT (A) 0.01 0.1 1 PULSE WIDTH TIME (ms) 10 100 1000 FIGURE 6. SP723 TYPICAL SINGLE PULSE PEAK CURRENT CURVES SHOWING THE MEASURED POINT OF OVERSTRESS IN AMPERES vs PULSE WIDTH TIME IN MILLISECONDS w w w. l i t t e l f u s e . c o m 243 TVS DIODE ARRAYS TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 Dual-In-Line Plastic Packages (PDIP) N E1 INDEX AREA 12 3 N/2 -B-AD BASE PLANE SEATING PLANE D1 B1 B 0.010 (0.25) M D1 A1 A2 L A C L E E8.3 (JEDEC MS-001-BA ISSUE D) 8 LEAD DUAL-IN-LINE PLASTIC PACKAGE INCHES SYMBOL A A1 A2 MIN 0.015 0.115 0.014 0.045 0.008 0.355 0.005 0.300 0.240 MAX 0.210 0.195 0.022 0.070 0.014 0.400 0.325 0.280 MILLIMETERS MIN 0.39 2.93 0.356 1.15 0.204 9.01 0.13 7.62 6.10 MAX 5.33 4.95 0.558 1.77 0.355 10.16 8.25 7.11 NOTES 4 4 8, 10 5 5 6 5 6 7 4 9 -C- B B1 C D D1 E eA eC C e C A BS eB NOTES: 1. Controlling Dimensions: INCH. In case of conflict between English and Metric dimensions, the inch dimensions control. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication No. 95. 4. Dimensions A, A1 and L are measured with the package seated in JEDEC seating plane gauge GS-3. 5. D, D1, and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch (0.25mm). 6. E and eA are measured with the leads constrained to be perpendicular to datum -C- . 7. eB and eC are measured at the lead tips with the leads unconstrained. eC must be zero or greater. 8. B1 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm). 9. N is the maximum number of terminal positions. 10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3, E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm). E1 e eA eB L N 0.100 BSC 0.300 BSC 0.115 8 0.430 0.150 - 2.54 BSC 7.62 BSC 10.92 3.81 8 2.93 244 w w w. l i t t e l f u s e . c o m TVS Diode Arrays Electronic Protection Array for ESD and Overvoltage Protection SP723 Small Outline Plastic Packages (SOIC) N INDEX AREA E -B1 2 3 SEATING PLANE -AD -C A h x 45o H 0.25(0.010) M BM M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE INCHES SYMBOL A A1 MIN 0.0532 0.0040 0.013 0.0075 0.1890 0.1497 MAX 0.0688 0.0098 0.020 0.0098 0.1968 0.1574 MILLIMETERS MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00 NOTES 9 3 4 5 6 7 8o - L B C D E e 0.050 BSC 0.2284 0.0099 0.016 8 0o 8o 0.2440 0.0196 0.050 1.27 BSC 5.80 0.25 0.40 8 0o 6.20 0.50 1.27 e B 0.25(0.010) M C AM BS A1 0.10(0.004) H C h L N NOTES: 1. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension "E" does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. "L" is the length of terminal for soldering to a substrate. "N" is the number of terminal positions. Terminal numbers are shown for reference only. The lead width "B", as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 6. 7. 8. 9. 5 TVS DIODE ARRAYS w w w. l i t t e l f u s e . c o m 245 |
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