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05100
Only One Name Means ProTek’Tion™
ULTRA LOW CAPACITANCE TVS ARRAY
APPLICATIONS
✔ Low Voltage Wireless Equipment
✔ Sensor & Control Circuits
✔ Ethernet - 10/100 Base T
✔ FireWire
IEC COMPATIBILITY (EN61000-4)
✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
✔ 61000-4-4 (EFT): 40A - 5/50ns
✔ 61000-4-5 (Surge): 24A, 8/20µs - Level 2(Line-Ground) & Level 3(Line-Line)
FEATURES
✔ 250 Watts Peak Pulse Power per Line (tp = 8/20µs)
✔ Unidirectional Configuration
✔ ESD Protection > 25 kilovolts
✔ Low Clamping Voltage < 5 Volts
✔ ✔
✔
ULTRA LOW CAPACITANCE: 2.5pF
✔ ✔
PLC497
SOT-23
MECHANICAL CHARACTERISTICS
✔ Molded JEDEC SOT-23
✔ Weight 14 milligrams (Approximate)
✔ Flammability rating UL 94V-0
✔ 8mm Tape and Reel Per EIA Standard 481
✔ Device Marking: Marking Code
PIN CONFIGURATION
1
2
3
105100.R4 8/03 www.protekdevices.com
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DEVICE CHARACTERISTICS
MAXIMUM RATINGS @ 25°C Unless Otherwise Specified
PLC497
PARAMETER
Peak Pulse Power - tp= 8/20µs (See Figure 1)
Operating Temperature
Storage Temperature
SYMBOL VALUE UNITS
P
PP
J
T
STG
250 W
-55°C to 150°CT
-55°C to 150°C°C
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified
PA RT
NUMBER
DEVICE
MARKING
CODE
RATED
STAND-OFF
VOLTAGE
V
WM
VOLTS
Note 1: Apply positive voltage from pin2 to 1.
Note 2: Apply positive voltage from pin 1 to 2.
Note 3: Capcitance from pin 1 to 2 < 2.5pF.
MINIMUM
BREAKDOWN
VOLTAGE
(See Note 1)
@1mA
V
(BR)
VOLTS
MAXIMUM
REVERSE
LEAKAGE
CURRENT
(See Note 1)
@V
WM
I
D
µA
201.31.0LCPLC497
MAXIMUM
CLAMPING
VOLTAGE
(See Note 1)
(See Fig. 2)
@8/20µs
VC @ I
PP
MAXIMUM
WORKING
INVERSE
BLOCKING
VOLTAGE
(See Note 2)
V
WIB
VOLTS
755.0V @ 50A
INVERSE
BLOCKING
LEAKAGE
CURRENT
(See Note 2)
@V
WIB IR
µA
°C
MAXIMUM
CAPACITANCE
(See Note 3)
@0V, 1MHz
C
pF
2.51.0
PEAK PULSE POWER VS PULSE TIME
FIGURE 1
10,000
1,000
250W, 8/20µs Waveform
100
- Peak Pulse Current - Watts
PP
P
10
0.01 1 10 100 1,000 10,000
td - Pulse Duration - µs
FIGURE 2
120
PP
100
80
60
40
- Peak Pulse Current - % of I
20
PP
I
0
0 5 10 15 20 25 30
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PULSE WAVE FORM
t
f
Peak Value I
-t
e
td = t
t - Time - µs
PP
IPP/2
TEST
WAVEFORM
PARAMETERS
tf = 8µs
td = 20µs
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GRAPHS
PLC497
POWER DERATING CURVE
100
80
60
40
% Of Rated Power
20
0
0 25 50 75 100 125 150
TL - Lead Temperature - °C
Peak Pulse Power
8/20µs
Average Power
FIGURE 4
OVERSHOOT & CLAMPING VOLTAGE FOR PLC497
35
25
15
FIGURE 3
5
5 Volts per Division
-5
ESD Test Pulse: 25 kilovolt, 1/30ns (waveshape)
FIGURE 5
TYPICAL CLAMPING VOLTAGE VS PEAK PULSE CURRENT FOR PLC497
16
12
8
4
- Clamping Voltage - Volts
C
V
0
0 2 4 6 8 10 12 14 16 18
IPP - Peak Pulse Current - Amps
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PLC497
APPLICATION NOTE
The PLC497 is an ultra low capacitance, bidirectional array that is designed to protect I/O or high speed data lines from the damaging effects of ESD
or EFT. This product has a surge capability of 250 Watts PPP per line for an 8/20µs wave form and offers ESD protection > 40kV.
DIFFERENTIAL-MODE CONFIGURATION (Figure 1)
The PLC497 is designed to protect one unidirectional line. Figure 1 shows a typical differential-mode (line to line) I/O port protection circuit application. To achieve bidirectional protection, two PLC497 units are placed in parallel with opposing polarities within the circuit layout.
Circuit connectivity is as follows:
✔ Pins 1 and 2 of each device connected to datalines
✔ Pin 3 is not connected
COMMON-MODE CONFIGURATION (Figure 2)
The PLC497 can provide protection for sensor circuit applications. Figure 2 is a typical common-mode (line to ground) sensor circuit application. To
achieve bidirectional protection in this application, a second pair of TVS devices is added in parallel with opposing polarities where pins 2 are
connected to the line, pins 1 connected to ground and pins 3 unconnected.
Circuit connectivity is as follows:
✔ Pins 1 each device connected to datalines
✔ Pins 2 each device connected to ground
✔ Pin 3 is not connected
Figure 1. Typical Differential-Mode i/o Port Protection Circuit
LINE 1 OUTLINE 1 IN
CIRCUIT BOARD LAYOUT RECOMMENDATIONS
Circuit board layout is critical for Electromagnetic
Compatibility (EMC) protection. The following guidelines
are recommended:
✔ The protection device should be placed near the
input terminals or connectors, the device will divert
the transient current immediately before it can be
coupled into the nearby traces.
✔ The path length between the TVS device and the
protected line should be minimized.
✔ All conductive loops including power and ground
loops should be minimized.
✔ The transient current return path to ground should
be kept as short as possible to reduce parasitic
inductance.
✔ Ground planes should be used whenever possible.
For multilayer PCBs, use ground vias.
1
33
2
Figure 2. Typical Common-Mode Sensor Protection Circuit
1
SENSOR
2
1
33
2
2
33
1
2
1
2
1
LINE 2 OUTLINE 2 IN
CIRCUITRY
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Page 5
PACKAGE OUTLINE & DIMENSIONS
PLC497
PACKAGE OUTLINE
A
L
3
B
1
2
S
K
0º - 10º
PACKAGE DIMENSIONS
J
SOT-23
MILLIMETERS
INCHES
DIM MIN MAX MIN MAX
V
G
A
B
C
D
G
C
H
J
D
H
K
L
S
V
MOUNTING PAD
0.037” (0.95mm)
NOTES
1. Dimensioning and tolerances per ANSI Y14.5M, 1985.
2. Controlling Dimension: Inches
3. Pin 3 is the cathode (Unidirectional Only).
4. Dimensions are exclusive of mold flash and metal burrs.
2.80
1.20
0.89
0.37
1.78
0.013
0.085
0.45
0.89
2.10
0.45
3.04
1.40
1.11
0.50
2.04
0.100
0.177
0.60
1.02
2.50
0.60
0.1102
0.0472
0.0350
0.0150
0.0701
0.0005
0.0034
0.0180
0.0350
0.0830
0.0177
0.1197
0.0551
0.0440
0.0200
0.0807
0.0040
0.0070
0.0236
0.0401
0.0984
0.0236
0.079” (2.00mm)
0.033” (0.85mm)
0.033” (0.85mm)
COPYRIGHT © ProTek Devices 2003
SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical
characteristics described herein without notice (except JEDEC).
DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice, and that
the final judgement concerning selection and specifications is the buyer’s and that in furnishing
engineering and technical assistance, ProTek assumes no responsibility with respect to the
selection or specifications of such products.
TAPE & REEL ORDERING NOMENCLATURE
1. Surface mount product is taped and reeled in accordance
with EIA-481.
2. Suffix -T7 = 7 Inch Reel - 3,000 pieces per 8mm tape,
i.e.,
PLC497-T7.
3. Suffix -T13 = 13 Inch Reel - 10,000 pieces per 8mm tape,
i.e.,
PLC497-T13
.
Outline & Dimensions: Rev 1 - 11/01, 06012
ProTek Devices
2929 South Fair Lane, Tempe, AZ 85282
Tel: 602-431-8101 Fax: 602-431-2288
E-Mail: sales@protekdevices.com
Web Site: www.protekdevices.com
5 www.protekdevices.com05100.R4 8/03
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