SRDA70-4 Datasheet, PDF (1/2 Pages) Semtech Corporation – RailClamp Low Capacitance TVS Diode Array

SCOTTSDALE DIVISION
SRDA70-4
STEERING DIODE TVS ARRAY
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 high-
density 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 array^TM SERIES
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)
PART
NUMBER
SRDA70-4
DEVICE
MARKING
SM70-4
PEAK
REVERSE
VOLTAGE
V_RWM
VOLTS
MAX
70
ELECTRICAL CHARACTERISTICS
BREAKDOWN
VOLTAGE
V_BR
@50 µA
VOLTS
MIN
85
FORWARD
CLAMPING
VOLTAGE
V_FC
@ 1 Amp
(Figure 2)
VOLTS
MAX
1.3
FORWARD
CLAMPING
VOLTAGE
V_FC
@ 10 Amp
(Figure 2)
VOLTS
MAX
3.3
REVERSE
LEAKAGE
CURRENT
I_R
@ V_RWM
µA
MAX
5
CAPACITANCE
(f=1 MHz)
C
@ 0V
Between I/O
pins and ground
pF
MAX
15
CAPACITANCE
(f=1 MHz)
C
@ 0V
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, [phone], Fax: [phone]
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