SRDA70-4 STEERING DIODE TVS ARRAY SCOTTSDALE DIVISION TVS arrayTM SERIES 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. WWW . Microsemi .C OM DESCRIPTION IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com FEATURES • • • • APPLICATIONS / BENEFITS 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 • • • • Data Line Protection Latch-Up Protection RS-232 & RS-422 Interface Networks Computer I/O Ports • LAN MAXIMUM RATINGS • • • • • • MECHANICAL AND PACKAGING • • • • • • 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 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 SRDA70-4 Copyright 2004 8-26-2004 REV A DEVICE MARKING SM70-4 BREAKDOWN VOLTAGE VBR VOLTS FORWARD CLAMPING VOLTAGE VFC @ 1 Amp (Figure 2) FORWARD CLAMPING VOLTAGE VFC @ 10 Amp (Figure 2) REVERSE LEAKAGE CURRENT IR CAPACITANCE (f=1 MHz) C @ 0V CAPACITANCE (f=1 MHz) C @ 0V @ VRWM VOLTS VOLTS VOLTS µA Between I/O pins and ground pF Between I/O pins pF MAX MIN MAX MAX MAX MAX TYP 70 85 1.3 3.3 5 15 4 @50 µA 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 DA70-4 PART NUMBER PEAK REVERSE VOLTAGE VRWM SRDA70-4 STEERING DIODE TVS ARRAY SCOTTSDALE DIVISION VBR VRWM VFC IR C 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. Ppp Peak Pulse Power (kW) GRAPHS WWW . Microsemi .C OM SYMBOLS & DEFINITIONS Definition Symbol Figure 1 Peak Pulse Power Vs Pulse Time t = µsec Figure 2 Pulse Wave Form OUTLINE AND SCHEMATIC PAD LAYOUT 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 SRDA70-4 DIM A B C D F G J K L P SCHEMATIC Microsemi Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 Page 2