RClamp0502B Datasheet

RClamp0502B
Ultra-Low Capacitance TVS
for ESD and CDE Protection
PROTECTION PRODUCTS - RailClamp
Description
Features
‹ Transient protection for high-speed data lines to
RailClamps are ultra low capacitance TVS arrays
designed to protect high speed data interfaces. This
series has been specifically designed to protect sensitive components which are connected to high-speed
data and transmission lines from overvoltage caused
by ESD (electrostatic discharge), CDE (Cable Discharge
Events), and EFT (electrical fast transients).
The RClampTM0502B has a typical capacitance of only
0.50pF (pin 1 to 2). This means it can be used on
circuits operating in excess of 3GHz without signal
attenuation. They may be used to meet the ESD
immunity requirements of IEC 61000-4-2, Level 4
(±15kV air, ±8kV contact discharge). Each device can
be configured to protect 1 bidirectional line or two
unidirectional lines.
These devices are in a small SC-75 (SOT-523) package
and feature a lead-free, matte tin finish. They are compatible with both lead free and SnPb assembly techniques. They are designed for use in applications where
board space is at a premium. The combination of small
size, low capacitance, and high level of ESD protection
makes them a flexible solution for applications such as
HDMI, MDDI, antenna circuits, Automatic Test Equipment,
USB 2.0, and Infiniband circuits.
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IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Designed to replace polymer TVS
Protects up to two I/O lines
Ultra-Low capacitance (<1pF)
No insertion loss to >3.0GHz
Low profile (<1mm)
Low leakage current and clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
Mechanical Characteristics
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SC-75 (SOT-523) package
Lead Finish: Matte Tin
RoHS/WEEE Compliant
Molding compound flammability rating: UL 94V-0
Marking: P5
Packaging: Tape and Reel
Applications
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Dimensions
High-Definition Multimedia Interface (HDMI)
Mobile Display Digital Interface (MDDI)
USB 2.0 & Firewire Ports
GaAs Photodetector Protection
HBT Power Amp Protection
Infiniband Transceiver Protection
Schematic & PIN Configuration
1.60
0.50 BSC
3
0.80
1
1.60
2
1.00
BSC
0.75
Nominal Dimensions (mm)
Revision 10/26/2007
SC-75 3L (Top View)
1
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RClamp0502B
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
Pp k
125
Watts
Peak Pulse Current (tp = 8/20µs)
IP P
5
A
ESD p er IEC 61000-4-2 (Air)
ESD p er IEC 61000-4-2 (Contact)
VESD
15
8
kV
TJ
-55 to +125
°C
TSTG
-55 to +150
°C
Op erating Temp erature
Storage Temp erature
Electrical Characteristics (T=25oC)
Parameter
Symbol
Conditions
Reverse Stand-Off Voltage
VRWM
Pin 1 or Pin 2 to Pin 3
and Between Pins 1 and 2
Reverse Breakdown Voltage
V BR
It = 1mA
Pin 1 or Pin 2 to Pin 3
and Between Pins 1 and 2
Reverse Leakage Current
IR
VRWM = 5V, T=25°C
Pin 1 or Pin 2 to Pin 3
and Between Pins 1 and 2
1
µA
Clamping Voltage
VC
IPP = 1A, tp = 8/20µs
Pi n 1 to Pi n 2
15
V
Clamping Voltage
VC
IPP = 5A, tp = 8/20µs
Pin 1 or Pin 2 to Pin 3
22
V
Clamping Voltage
VC
IPP = 5A, tp = 8/20µs
Pi n 1 to Pi n 2
25
V
Junction Capacitance
Cj
VR = 0V, f = 1MHz
Pi n 1 to Pi n 2
0.9
pF
Junction Capacitance
Cj
VR = 0V, f = 1MHz
Pin 1 or Pin 2 to Pin 3
1.2
pF
 2007 Semtech Corp.
2
Minimum
Typical
Maximum
Units
5
V
6
V
0.60
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RClamp0502B
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
10
110
90
% of Rated Power or IPP
Peak Pulse Power - PPP (kW)
100
1
0.1
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
0
1000
25
50
75
100
125
150
Ambient Temperature - TA (oC)
Pulse Duration - tp (µs)
Clamping Voltage vs. Peak Pulse Current
Pin 1 to Pin 2
Clamping Voltage vs. Peak Pulse Current
Pin 1 or Pin 2 to Pin 3
20
25
Clamping Voltage - VC (V)
Clamping Voltage - VC (V)
18
20
15
10
Waveform
Parameters:
tr = 8µs
td = 20µs
5
16
14
12
10
8
6
Waveform
Parameters:
tr = 8µs
td = 20µs
4
2
0
0
0
1
2
3
4
5
0
6
1
Normalized Capacitance vs. Reverse Voltage
Pin 1 or Pin 2 to Pin 3
3
4
5
6
Normalized Capacitance vs. Reverse Voltage
Pin 1 to Pin 2
1.2
1.4
f = 1 MHz
1.2
1
1
CJ(VR) / CJ(VR=0)
CJ(VR) / CJ(VR=0)
2
Peak Pulse Current - IPP (A)
Peak Pulse Current - IPP (A)
0.8
0.6
0.4
0.8
0.6
0.4
0.2
f = 1 MHz
0.2
0
0
1
 2007 Semtech Corp.
2
3
Reverse Voltage - VR (V)
4
0
5
3
1
2
3
Reverse Voltage - VR (V)
4
5
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RClamp0502B
PROTECTION PRODUCTS
Typical Characteristics
Insertion Loss S21 (Pin 1 to Pin 2)
CH1 S21
LOG
Insertion Loss S21 (Pin 1 or Pin 2 to Pin 3)
6 dB / REF 0 dB
CH1 S21
3
0 dB
1
2: .07870 dB
1.8 GHz
2: .02010 dB
1.8 GHz
3: .28040 dB
2.5 GHz
3
0 dB
2
-6 dB
-12 dB
-12 dB
-18 dB
-18 dB
-24 dB
-24 dB
-30 dB
-30 dB
1
MHz
10
MHz
100
MHz
-36 dB
3
1
GHz GHz
STOP 3000. 000000 MHz
START . 030 MHz
6 dB / REF 0 dB
1: .00460 dB
900 MHz
-6 dB
-36 dB
LOG
1: .03430 dB
900 MHz
1
1
MHz
START . 030 MHz
ESD Clamping
(4kV Contact per IEC 61000-4-2)
10
MHz
100
MHz
3: -.08180 dB
2.5 GHz
2
3
1
GHz GHz
STOP 3000. 000000 MHz
ESD Clamping
(8kV Contact per IEC 61000-4-2)
Note: Data is taken with a 10x attenuator
Note: Data is taken with a 10x attenuator
Analog Crosstalk
CH1 S21
LOG
START . 030 MHz
 2007 Semtech Corp.
20 dB /REF 0 dB
STOP 3000. 000000 MHz
4
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RClamp0502B
PROTECTION PRODUCTS
Applications Information
Figure 1. Pin Configuration
Device Connection Options
This device is optimized for protection of 1 line
operating in excess of 3GHz. It may also be used to
protect two lines operating in excess of 2.0GHz. The
device is connected as follows:
Protection for one line with <1pF capacitance can be
achieved by connecting one data line to either pin 1 or
pin 2 with the other pin connected to ground. Pin 3 is
not connected. The connection to ground should be
made directly to a ground plane. The path length
should also be kept as short as possible to minimize
parasitic inductance.
Protection of two lines is achieved by connecting data
lines at pins 1 & 2. Pin 3 is connected to ground. The
connection to ground should be made directly to a
ground plane. The path length should also be kept as
short as possible to minimize parasitic inductance.
Matte Tin Lead Finish
Matte tin has become the industry standard lead-free
replacement for SnPb lead finishes. A matte tin finish
is composed of 100% tin solder with large grains.
Since the solder volume on the leads is small compared to the solder paste volume that is placed on the
land pattern of the PCB, the reflow profile will be
determined by the requirements of the solder paste.
Therefore, these devices are compatible with both
lead-free and SnPb assembly techniques. In addition,
unlike other lead-free compositions, matte tin does not
have any added alloys that can cause degradation of
the solder joint.
 2007 Semtech Corp.
5
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RClamp0502B
PROTECTION PRODUCTS
Applications Information
The HDMI Compliance Test Specification (CTS) requires
sink (receiver) ports maintain a differential impedance
of 100 Ohms +/- 15%. The measurement is taken
using a Time Domain Reflectometry (TDR) method that
utilizes a pulse with a risetime <= 200ps.
ESD protection devices have an inherent junction
capacitance. Even a small amount of added
capacitance on an HDMI port will cause the
impedance of the differential pair to drop. As such,
some form of compensation to the layout will be
required to bring the differential pairs back within the
required 100 Ohm +/- 15% range. The higher the
added capacitance, the more extreme the
modifications will need to be. If the added
capacitance is too high, compensation may not even
be possible. The RClamp0502B presents <1pF
capacitance between the pairs while being rated to
handle >8kV ESD contact discharges (>15kV air
discharge) as outlined in IEC 61000-4-2. As such, it is
possible to make minor adjustments to the board
layout parameters to compensate for the added
capacitance of the RClamp0502B. Figure 2 shows
how to implement the RClamp0502B in an HDMI
application (transmitter and receiver). Figure 3 shows
impedance test results using a Semtech evaluation
board with layout compensation. As shown, the device
meets the HDMI CTS impedance requirements.
A
X-axis
Y-axis
A
1.640
99.2
B
B
1.855
104.6
(nsec)
(Ohm)
Figure 3 - TDR Measurement using Semtech
Evaluation Board
HDMI Transmitter
HDMI Display
Figure 2 - HDMI Schematic
 2007 Semtech Corp.
6
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RClamp0502B
PROTECTION PRODUCTS
Applications Information - Spice Model
RClamp0502B Spice Model
R Clamp0502B Spice Parameters
 2007 Semtech Corp.
Parameter
Unit
D1 (T VS)
D2 (T VS)
IS
Amp
4.43E-14
4.43E-14
BV
Volt
8.89
8.89
VJ
Volt
0.68
0.68
RS
Ohm
1.72
1.72
IB V
Amp
1.0E-3
1.0E-3
CJO
Farad
1.18E-12
1.18E-12
TT
sec
2.541E-9
2.541E-9
M
--
0.133
0.133
N
--
1.1
1.1
EG
eV
1.11
1.11
7
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RClamp0502B
PROTECTION PRODUCTS
Outline Drawing -SC-75 (SOT-523)
A
D
DIM
e1
B
A
A1
A2
b
c
D
E
E1
e
e1
L
N
0
aaa
bbb
3
E
E1
1
2
bxN
bbb
e
A
C A B
A2
DIMENSIONS
INCHES
MILLIMETERS
MIN NOM MAX MIN NOM MAX
.023
.035
.000
.004
.023 .030 .031
.005
.012
.003
.008
.059 .063 .067
.057 .063 .069
.029 .031 .033
.039 BSC
.020 BSC
(.009)
3
0°
8°
.004
.008
0.60
0.00
0.60
0.15
0.10
1.50
1.45
0.75
0.75
-
0.90
0.10
0.80
0.30
0.20
1.60 1.70
1.60 1.75
0.80 0.85
1.00 BSC
0.50 BSC
(0.22)
3
0°
8°
0.10
0.20
aaa C
SEATING PLANE
A1
C
H
SEE DETAIL A
0
SEATING
PLANE
C
SIDE VIEW
c
L
DETAIL A
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. DATUMS -A- AND -B-
TO BE DETERMINED AT DATUM PLANE -H-
3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
Land Pattern -SC-75 (SOT-523)
X
Y
Z
C
DIM
C
P
p1
G
X
Y
Z
G
Y
DIMENSIONS
INCHES
MILLIMETERS
(.055)
.039
.020
.024
.016
.031
.087
(1.40)
1.00
0.50
0.60
0.40
0.80
2.20
p1
P
NOTES:
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
 2007 Semtech Corp.
8
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RClamp0502B
PROTECTION PRODUCTS
Marking
Ordering Information
P5
Part Number
Lead
Finish
Qty per
Reel
Reel
Size
RClamp 0502B.TCT
Pb Free
3,000
7 Inch
RailClamp and RClamp are registered marks of Semtech Corporation
Tape and Reel Specification
Device Orientation in Tape
Tape
Width
B, (Max)
D
D1
( M IN )
8 mm
4.2 mm
(.165)
1.5 + 0.1 mm
- 0.0 mm
(0.59 +.005
- .000)
1.0 mm
(.039)
E
1.750±.10
mm
(.069±.004)
F
K
(MAX)
P
P0
P2
T(MAX)
W
3.5±0.05
mm
(.138±.002)
2.4 mm
(.094)
4.0±0.1
mm
(.157±.004)
4.0±0.1
mm
(.157±.004)
2.0±0.05mm
(.079±.002)
0.4 mm
(.016)
8.3 mm
(.312±.012)
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Rd., Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
 2007 Semtech Corp.
9
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