SMDA05-18
SURFACE MOUNT ESD PROTECTION ARRAY
Standoff Voltage - 5.0 Volts Peak Pulse Power - 175 W atts
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 Por t 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
MECHANICAL DATA
Case: JEDEC MS-013-AC molded plastic over passivated
junctions
Terminal: Solder plated, solderable per MIL-STD-750,
Method 2026
Polarity: Unidirectional, as mar ked
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) PPPM Minimum 175 Watts
Peak power pulse current with a 8.0/20µs waveform (NOTE 1) IPPM 13.3 Amps
Operating junction and storage temperature range TJ,TSTG -50 to +125 °C
NOTES:
(1) Non-repetitive current pulse, per Fig.3 and derated above TA=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
SO-20/MS-013-AC
0° - 8° 0.394(10.00)
0.419(10.65) 0.016(0.40)
0.050(1.27)
0.009(0.23)
0.012(0.32)
0.010(0.25)
0.029(0.75)x 45°
110
11
20
0.496(12.60)
0.511(13.00)
0.291(7.40)
0.299(7.60)
0.050 BSC
1.27 BSC
0.013(0.33)
0.020(0.51)
Dimensions in inches and (millimeters)
ELECTRICAL CHARACTERISTICS at 25°C
MINIMUM MAXIMUM MAXIMUM MAXIMUM MAXIMUM MAXIMUM
DEVICE BREAKDOWN CLAMPING CLAMPING FORWARD REVERSE JUNCTION
PART MARKING STAND-OFF VOLTAGE at IT=10mA VOLTAGE VOLTAGE VOLTAGE DROP LEAKAGE CAPACITANCE
NUMBER CODE VOLTAGE (NOTE 1) at IPP = 1A at IPP = 5A at IF=200 mA CURRENT at VWM (NOTE 3)
VWM V(BR) VC (NOTE 2) VC (NOTE 2) VFIDCJ
Volts Volts Volts Volts Volts µµApF
SMDA05-18 VEB 5.0 6.0 9.8 11.0 1.25 20.0 120
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 MHZand applied VR=0 volts
RATINGS AND CHARACTERISTIC CURVES FOR SMDA05-18
0 25 50 75 100 125 150 175 200
0
25
50
75
100
0 1020304050607080
0
50
100
150
FIG. 2 - PULSE DERATING CURVE
FIG. 3 - PULSE WAVEFORM
t, TIME, µs
TA, AMBIENT TEMPERATURE, °C
PULSE DURATION (td) is
DEFINED AS the POINT
WHERE the PEAK CURRENT
DECAYS to 50% of IPP
8/20µs WAVEFORM as
DEFINED by ANSI/IEEE C62.35
HALF VALUE - IPP
2
PEAK VALUE IPP
tr=8.0µsec.
IPPM,PEAK PULSE CURRENT, %
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT, %
0.420 (10.66)
MIN
0.030 ± 0.005
(0.762 ± 0.127)
0.050 typ.
(0.127)
0.307 ± 0.005
(7.8 ± .82)
0.045 ± 0.005
(1.14 ± 0.127)
1
20 11
10
100 1 10 100 1 10
0.01
0.1
1
10
FIG. 1 - PEAK PULSE POWER RATING CURVE
WAVEFORM - SEE FIG. 3
NON-REPETITIVE
PPPM, PEAK PULSE POWER, kW
td, PULSE DURATION, sec.
FIG. 4 - TYPICAL RESPONSE TO 8KV POSITIVE
GOING ESD PULSE
SOLDER PAD GEOMETRY
CIRCUIT DIAGRAM
105
84
63
42
21
0V
-21
-42
-63
-84
-105010 20 30 40 50 60 70 80
t, TIME, ns
LET THROUGH V OLTAGE, VOLTS
ms
ms
µs
µs
µs
ns
GND
GND
±
±
±
±
td
UNIDIRECTIONAL
*Application note: Due to the topology of the SMDA array, the VRWM 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.
