SMDA05-18
SURFACE MOUNT ESD PROTECTION ARRAY
Standoff Voltage -
5.0 Volts
SO-20/MS-013-AC
Peak Pulse Power -
175 Watts
FEATURES
♦
Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
♦
Offers ESD protection in accordance with IEC1000-4-2
(IEC801-2)
♦
Monolithic TVS junctions in a
wide body package
♦
175W peak pulses power surge capability
♦
Excellent clamping capability
♦
Protection of up to eighteen data lines
♦
Ideal for Centronix Port protection
♦
Fast response time: typically less than 1.0ns from
0 Volts to V
(BR)
♦
High temperature soldering guaranteed:
265°C for 5 seconds at terminals
0.496(12.60)
0.511(13.00)
20
11
0.291(7.40)
0.299(7.60)
1
10
0.013(0.33)
0.020(0.51)
0.050 BSC
1.27 BSC
0.010(0.25)
x 45°
0.029(0.75)
MECHANICAL DATA
0.009(0.23)
0.012(0.32)
0.394(10.00)
0.419(10.65)
0.016(0.40)
0.050(1.27)
0° - 8°
Dimensions in inches and (millimeters)
Case:
JEDEC MS-013-AC molded plastic over passivated
junctions
Terminal:
Solder plated, solderable per MIL-STD-750,
Method 2026
Polarity:
Unidirectional, as marked
Mounting Position:
Any
Weight:
0.10 ounce, 2.50 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
RATING
SYMBOL
VALUE
UNITS
Peak power dissipation with a 8.0/20µs waveform
(NOTE 1, FIG 1)
Peak power pulse current with a 8.0/20µs waveform
(NOTE 1)
Operating junction and storage temperature range
P
PPM
I
PPM
T
J
,T
STG
Minimum 175
13.3
-50 to +125
Watts
Amps
°C
NOTES:
(1) Non-repetitive current pulse, per Fig.3 and derated above T
A
=25°C per Fig. 2
(2) Mounted on copper pad areas of 0.045 x 0.030” (1.14 x 0.076 mm) per leg
UNIDIRECTIONAL APPLICATIONS
ELECTRICAL CHARACTERISTICS at 25°C
PART
NUMBER
DEVICE
MARKING
CODE
STAND-OFF
VOLTAGE
V
WM
Volts
5.0
MINIMUM
BREAKDOWN
VOLTAGE at I
T
=10mA
(NOTE 1)
MAXIMUM
CLAMPING
VOLTAGE
at I
PP =
1A
V
C (NOTE 2)
Volts
9.8
MAXIMUM
CLAMPING
VOLTAGE
at I
PP =
5A
V
C (NOTE 2)
Volts
11.0
MAXIMUM
MAXIMUM
MAXIMUM
FORWARD
REVERSE
JUNCTION
VOLTAGE DROP
LEAKAGE
CAPACITANCE
at I
F
=200 mA CURRENT at V
WM
(NOTE 3)
V
F
Volts
1.25
I
D
µ
A
20.0
C
J
pF
120
UNIDIRECTIONAL
V
(BR)
Volts
6.0
SMDA05-18
VEB
NOTES:
(1) V
(BR)
measured at pulse width of 300µs sq. wave or equivalent
(2) Surge current waveform per Fig. 3 and derate per Fig. 2
(3) Junction capacitance measured between I/O pin and ground
at 1.0 MH
Z
and applied V
R
=0 volts
*Application note: Due to the topology of the SMDA array, the V
RWM
and V
(BR)
specifications also
apply to the differential voltage between any two data line pins. Hence the SMDA05-18 is designed
to “see” a maximum voltage excursion of ± 2.5 volts between any two data lines.
CIRCUIT DIAGRAM
20
SOLDER PAD GEOMETRY
11
0.045
±
0.005
±
(1.14 ± 0.127)
±
GND
0.420 (10.66)
MIN
0.307
±
0.005
±
(7.8 ± .82)
±
1
GND
10
0.030 ± 0.005
(0.762 ± 0.127)
0.050 typ.
(0.127)
RATINGS AND CHARACTERISTIC CURVES FOR SMDA05-18
FIG. 1 - PEAK PULSE POWER RATING CURVE
10
FIG. 2 - PULSE DERATING CURVE
100
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT, %
P
PPM
, PEAK PULSE POWER, kW
WAVEFORM - SEE FIG. 3
NON-REPETITIVE
1
75
50
25
0
0.1
0.01
100
ns
1
µs
10
µs
100
µs
1
ms
10
ms
0
25
50
75
100 125 150 175 200
td, PULSE DURATION, sec.
T
A
, AMBIENT TEMPERATURE, °C
FIG. 3 - PULSE WAVEFORM
FIG. 4 - TYPICAL RESPONSE TO 8KV POSITIVE
GOING ESD PULSE
105
150
I
PPM
,
PEAK PULSE CURRENT, %
LET THROUGH VOLTAGE, VOLTS
tr=8.0µsec.
PULSE DURATION (td) is
DEFINED AS the POINT
WHERE the PEAK CURRENT
DECAYS to
50% of I
PP
84
63
42
21
0V
-21
-42
-63
-84
-105
0
10
30
100
PEAK VALUE I
PP
HALF VALUE - I
PP
2
50
8/20µs WAVEFORM as
DEFINED by ANSI/IEEE C62.35
td
0
0
10
20
30
40
50
60
70
80
t, TIME,
µs
20
40
50
60
70
80
t, TIME, ns
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