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  Microsemi Electronic Components Datasheet  

SRDA70-4 Datasheet

STEERING DIODE TVS ARRAY

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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 arrayTM 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
SR70-4
PEAK
REVERSE
VOLTAGE
V RWM
VOLTS
MAX
70
ELECTRICAL CHARACTERISTICS
BREAKDOWN
VOLTAGE
V BR
@50 µA
VOLTS
FORWARD
CLAMPING
VOLTAGE
V FC
@ 1 Amp
(Figure 2)
VOLTS
FORWARD
CLAMPING
VOLTAGE
V FC
@ 10 Amp
(Figure 2)
VOLTS
REVERSE
LEAKAGE
CURRENT
IR
@ VRWM
µA
MIN
MAX
MAX
MAX
85 1.3 3.3 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 © 2002
MSCXXXX.PDF 12-03 2002 REV 0
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1


  Microsemi Electronic Components Datasheet  

SRDA70-4 Datasheet

STEERING DIODE TVS ARRAY

No Preview Available !

SCOTTSDALE DIVISION
SRDA70-4
STEERING DIODE TVS ARRAY
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.
GRAPHS
Figure 1
Peak Pulse Power Vs Pulse Time t = µsec
OUTLINE AND SCHEMATIC
Figure 2
Pulse Wave Form
PAD LAYOUT
INCHES
MILLIMETERS
DIM MIN
MAX
MIN
MAX
A
0.188
0.197
4.77
5.00
B
0.150
0.158
3.81
4.01
C
0.053
0.069
1.35
1.75
D
0.011
0.021
0.28
0.53
F
0.016
0.050
0.41
1.27
G 0.050 BSC
1.27 BSC
J
0.006
0.010
0.15
0.25
K
0.004
0.008
0.10
0.20
L
0.189
0.206
4.80
5.23
P
0.228
0.244
5.79
6.19
OUTLINE
SCHEMATIC
Copyright © 2002
MSCXXXX.PDF 12-03 2002 REV 0
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2


Part Number SRDA70-4
Description STEERING DIODE TVS ARRAY
Maker Microsemi
Total Page 2 Pages
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