SRDA70-4

SRDA70-4 STEERING DIODE TVS ARRAY SCOTTSDALE DIVISION DESCRIPTION These low capacitance diode arrays are multiple, discrete, isolated junctions fabricated by a planar process and mounted in a SO-8 package for use as steering diodes protecting up to four I/O ports from ESD, EFT, or surge by directing them either to the positive side of the power supply line or to ground (see schematic, page 2). An external TVS diode may be added between the positive supply line and ground to prevent overvoltage on the supply rail. These arrays offer many advantages of integrated circuits such as highdensity packaging and improved reliability. This is a result of fewer pick and place operations, smaller footprint, smaller weight, and elimination of various discrete packages that may not be as user friendly in PC board mounting. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com TVS arrayTM SERIES W W W . Microsemi . C O M FEATURES • • • • Diode Array to Protect Four I/O Lines Surge protection per IEC 61000-4-2, IEC 61000-4-4 and IEC61000-4-5 (1 kV, 24 A at 8/20 µs) UL 94V-0 Flammability Classification Low Capacitance for High-Speed Interfaces • • • • APPLICATIONS / BENEFITS Data Line Protection Latch-Up Protection RS-232 & RS-422 Interface Networks Computer I/O Ports LAN • MAXIMUM RATINGS • • • • • • Operating Temperature: -55°C to +150°C Storage Temperature: -55°C to +150°C Peak Pulse Power : 500 Watts (8/20 µs, Figure 1) Peak Pulse Current : 24 Amps (8/20 µs, Figure 1) Pulse Repetition Rate: < .01% Lead Soldering Temperature: 260°C for 10 seconds • • • • • • MECHANICAL AND PACKAGING Molded SO-8 Surface Mount Weight 0.066 grams (approximate) Marking: Logo, device marking code, date code Pin #1 defined by dot on top of package Tape & Reel per EIA Standard 481 13 inch reel; 2,500 pieces (OPTIONAL) • Carrier tubes; 95 pcs (STANDARD) ELECTRICAL CHARACTERISTICS PEAK REVERSE VOLTAGE VRWM BREAKDOWN VOLTAGE VBR @50 µA VOLTS MIN 85 FORWARD CLAMPING VOLTAGE VFC @ 1 Amp (Figure 2) VOLTS MAX 1.3 FORWARD CLAMPING VOLTAGE VFC @ 10 Amp (Figure 2) VOLTS MAX 3.3 REVERSE LEAKAGE CURRENT IR @ VRWM µA MAX 5 CAPACITANCE (f=1 MHz) C @ 0V Between I/O pins and ground pF MAX 15 CAPACITANCE (f=1 MHz) C @ 0V PART NUMBER DEVICE MARKING SRDA70-4 DA70-4 VOLTS MAX SRDA70-4 SM70-4 70 Between I/O pins pF TYP 4 Copyright  2004 8-26-2004 REV A Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 1 SRDA70-4 STEERING DIODE TVS ARRAY SCOTTSDALE DIVISION Symbol VBR VRWM VFC IR C SYMBOLS & DEFINITIONS Definition Minimum Breakdown Voltage: The minimum voltage the device will exhibit at a specified current. Working Peak Reverse Voltage: The maximum peak voltage that can be applied over the operating temperature range. Forward Clamping Voltage: The maximum forward clamping voltage across the device when subjected to a given current at a pulse time of 20 µs. Maximum Leakage Current: The maximum leakage current at VRWM. Capacitance: The capacitance of the TVS as defined @ 0 volts at a frequency of 1 MHz and stated in picofarads. W W W . Microsemi . C O M GRAPHS Ppp Peak Pulse Power (kW) Figure 1 Peak Pulse Power Vs Pulse Time t = µsec Figure 2 Pulse Wave Form OUTLINE AND SCHEMATIC PAD LAYOUT DIM A B C D F G J K L P Copyright  2004 8-26-2004 REV A INCHES MIN MAX 0.188 0.197 0.150 0.158 0.053 0.069 0.011 0.021 0.016 0.050 0.050 BSC 0.006 0.010 0.004 0.008 0.189 0.206 0.228 0.244 OUTLINE MILLIMETERS MIN MAX 4.77 5.00 3.81 4.01 1.35 1.75 0.28 0.53 0.41 1.27 1.27 BSC 0.15 0.25 0.10 0.20 4.80 5.23 5.79 6.19 SCHEMATIC SRDA70-4 Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2