RClamp0542T

RClamp0542T
RailClamp®
2-Line ESD Protection
PROTECTION PRODUCTS - RailClamp®
Description
Features
RailClamp TVS diode arrays are 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 RClamp®0542T has a typical capacitance of only
0.25pF between I/O pins. This allows it to be used on
circuits operating in excess of 3GHz without signal
attenuation. These devices are constructed using
Semtech’s proprietary RailClamp process technology.
This technology yields superior electrical characteristics
including reduced leakage current (IR), a key requirement for high-speed interfaces. As such, the
RClamp0542T has a maximum IR of only 50nA at 5
volts.
The RClamp0542T is in a 6-pin SLP1610P4T package. It
measures 1.6 x 1.0 x 0.4mm. The leads are spaced at
a pitch of 0.5mm and are finished with lead-free NiPdAu.
They are designed for easy PCB layout by allowing the
traces to run straight through the device. They may be
used to meet the ESD immunity requirements of IEC
61000-4-2. Each device is designed to protect two lines
(one differential pair). The combination of small size, low
capacitance, low leakage current, and high level of ESD
protection makes them a flexible solution for protection
of next generation interfaces including 10Gigabit
Ethernet, HDMI 1.4, and USB 3.0.
‹ Transient protection for high-speed data lines to
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IEC 61000-4-2 (ESD) ±18kV (air), ±12kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Array of surge rated diodes with internal TVS Diode
Small package saves board space
Protects up to 6-Lines operating at 5V
Low capacitance: 0.25pF typical (I/O to I/O)
No insertion loss to 3.0GHz
Low leakage current
Low clamping voltage
Innovative package for easy pcb layout
Solid-state silicon-avalanche technology
Mechanical Characteristics
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SLP1610P4T 6-pin package
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Nominal Dimensions: 1.6 x 1.0 x 0.40 mm
Lead Finish: NiPdAu
Molding compound flammability rating: UL 94V-0
Marking: Marking code
Packaging: Tape and Reel
Applications
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Circuit Diagram
10GBASE-T Ethernet
10/100/1000 Ethernet
SATA
USB 3.0
HDMI 1.4
PIN Configuration
Pin 1
1
2
3
6
5
4
Pin 2
3, 4
SLP1610P4T (Bottom View)
Revision 4/1/2010
1
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RClamp0542T
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20μs)
Pp k
75
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
+/- 18
+/- 12
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
Any I/O to GN D
Reverse Breakdown Voltage
V BR
It = 1mA,
Any I/O to GN D
Reverse Leakage Current
IR
VRWM = 5.0V,
Any I/O to GN D
Forward Voltage
VF
If = 15mA
Any I/O to GN D
Clamping Voltage
VC
Clamping Voltage
Junction Capacitance
© 2010 Semtech Corp.
Maximum
Units
5
V
8
11
V
0.005
0.050
μA
1.2
V
IPP = 1A, tp = 8/20μs
Any I/O to GN D
12
V
VC
IPP = 5A, tp = 8/20μs
Any I/O to GN D
15
V
Cj
VR = 0V, f = 1MHz,
Any I/O to GN D
0.45
0.60
pF
VR = 0V, f = 1MHz,
Between I/O pins
0.25
0.4
pF
2
Minimum
6.5
Typical
0.6
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RClamp0542T
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Pulse Waveform
110
10
Waveform
Parameters:
tr = 8µs
td = 20µs
90
80
PP
1
Percent of I
Peak Pulse Power - P PP (kW)
100
0.1
70
e-t
60
50
40
td = IPP/2
30
20
10
0
0.01
0.1
1
10
0
100
5
10
Pulse Duration - tp (us)
15
20
25
30
Time (µs)
Clamping Voltage vs. Peak Pulse Current
Normalized Capacitance vs. Reverse Voltage
f = 1MHz
1.8
14
1.6
12
1.4
CJ(VR) / CJ(VR=0)
Clamping Voltage - VC (V)
2
16
10
8
6
Waveform
Parameters:
tr = 8µs
td = 20µs
4
2
1.2
1
0.8
0.6
0.4
0.2
0
0
0
1
2
3
4
Peak Pulse Current - IPP (A)
5
0
6
1
2
3
Reverse Voltage - VR (V)
4
5
ESD Clamping (Any I/O to GND)
(+8kV Contact per IEC 61000-4-2)
Note: Data is taken with a 10x attenuator
© 2010 Semtech Corp.
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RClamp0542T
PROTECTION PRODUCTS
Typical Characteristics
Insertion Loss S21 - I/O to I/O
CH1 S21
LOG
Insertion Loss S21 - I/O to GND
6 dB / REF 0 dB
CH1 S21
LOG
6 dB / REF 0 dB
1: -0.0715 dB
800 MHz
5
0 dB
12
3
1: -0.2214 dB
800 MHz
2: -0.0442 dB
900 MHz
5
0 dB
12
4
3: -0.4690 dB
1.8 GHz
-6 dB
-12 dB
-18 dB
-12 dB
-24 dB
-30 dB
-30 dB
-36 dB
-36 dB
-42 dB
-42 dB
1
MHz
START. 030 MHz
© 2010 Semtech Corp.
10
MHz
100
MHz
4: -0.2029 dB
2.5 GHz
-18 dB
-24 dB
-48 dB
3: -0.6419 dB
1.8 GHz
-6 dB
4: -0.5150 dB
2.5 GHz
-48 dB
3
1
GHz GHz
STOP 3 000. 000000 MHz
1
MHz
START. 030 MHz
4
3
2: -0.2095 dB
900 MHz
4
10
MHz
100
MHz
3
1
GHz GHz
STOP 3 000. 000000 MHz
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RClamp0542T
PROTECTION PRODUCTS
Applications Information
Figure 1- Pin Configuration
Device Connection and Layout for Protecting 2 HighSpeed Lines
Selecting the correct component for ESD protection of
high-speed circuits is critical. Not only does the
designer have to consider device characteristics such
as clamping voltage and junction capacitance, but
package layout as well. A carefully chosen package
can mean the difference between a layout optimized
for high speed signals and one that requires uneven
trace routing, vias, and transmission line stubs.
The RClamp0542T is optimized for use on high-speed
lines. It utilizes a flow through design that allows
traces to be routed uninterrupted through the device.
This virtually eliminates impedance mismatches and
stubs in the high speed signal path. It also allows
traces to remain tightly coupled, reducing EMI
interference. Data lines enter the device at pins 1 and
2 and exit the devices at pins 5 and 6. Traces are
kept continuous and unbroken. Ground connection is
made at pins 3 and 4. The location and size of the
pins simplifies connection to the ground plane using
multiple vias. Parasitic inductance is thus reduced
enhancing ESD clamping performance.
1
2
3
6
5
4
Pin
Identification
1-2
Input Lines
5-6
Output Lines
(No Internal Connection)
3-4
Ground
Figure 2 - Circuit Diagram
Protection USB 3.0 Interfaces
USB 3.0 expands the USB interface to include two
superspeed differential pairs. These pairs are capable
of transmitting data up to 5Gbps or almost 10 times
faster than USB 2.0 high speed lines. In order to
maintain backwards compatibility, the USB connector
still retains the high speed D+ and D- differential pair
and one VBus line. There are several advantages in
using the RClamp0542T to protect the USB 3.0
superspeed lines. First, as mentioned above the flow
through design of the package minimizes any
discontinuity in the signal path. Also, using one
package per signal pair eliminates cross talk between
the transmit and receive pairs. Electrically, the low
leakage current (5nA typical) will not affect the line
termination impedance. Finally, it presents a typical
loading capacitance of <0.5pF between I/O and
ground. In some cases another device may be better
suited for use on the high speed lines. For example, in
mobile applications, RClamp1624T or RClamp3624T
are better solutions for the high speed lines since they
integrate high voltage protection for the VBus lines.
Some USB 3.0 protection examples are shown in
Figure 4 and 5.
© 2010 Semtech Corp.
Pin 1
Pin 2
3, 4
Figure 3 - Layout Example
5
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RClamp0542T
PROTECTION PRODUCTS
Applications Information
uClamp0511T
9
1
SSTx+
SSTx-
GND
SSRx+
SSRx-
GND
D+
D-
GND
USB3.0 Standard A Receptacle
RClamp0542T
Figure 4 - USB 3.0 Protection Example (Standard Type A Receptacle)
RClamp1624T
Pin 1
Pin 5
GND
GND
GND
Pin 6
GND
Pin 10
GND
RClamp0542T
(2 each)
Figure 5 - USB 3.0 Protection Example (Standard micro Type A and AB Receptacle)
© 2010 Semtech Corp.
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RClamp0542T
PROTECTION PRODUCTS
Applications Information
10GbaseT Ethernet Protection
of the magnetics. The amount of attenuation will vary
by vendor and configuration of the magnetics. It is
this transferred energy that must be clamped by the
protection circuitry.
When designing Ethernet protection, the entire system
must be considered. An Ethernet port includes
interface magnetics in the form of transformers and
common mode chokes. Transformers and chokes can
be discrete components, but integrated solutions that
include the RJ-45 connector, resistors, capacitors, and
protection are also available. In either case, the
transformer will provide a high level of common mode
isolation to external voltages, but no protection for
metallic (line-to-line) surges. During a metallic
transient event, current will flow into one line, through
the transformer and back to the source. As the
current flows, it charges the windings of the
transformer on the line side. Once the surge is
removed, the windings on the line side will stop
charging and will transfer its stored energy to the IC
side where the PHY is located. The magnitude and
duration of the surge is attenuated by the inductance
A typical protection scheme which utilizes the
RClamp0542T is shown in Figure 5. One device is
placed across each line pair and is located on the PHY
side of the transformer as close to the magnetics as
possible. This is done to minimize parasitic inductance
and improve clamping performance. Data lines are
routed through the device minimizing any discontinuity
in the signal path. The ground pins of the
RClamp0542T are left unconnected. When connected
in this configuration, the RClamp0542T presents a
typical capcitance of less than 0.3pF between each
line pair.
RClamp0542T
TP1+
RJ-45
Connector
TP1TP2+
1
2
TP2-
3
4
TP3+
5
6
7
10GBASE-T
Ethernet
PHY
TP3-
8
TP4+
TP4-
RClamp0542T
Figure 5 - 10GBaseT Protection Example
© 2010 Semtech Corp.
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RClamp0542T
PROTECTION PRODUCTS
Outline Drawing - SLP1610P4T
A
D
B
DIM
E
PIN 1
INDICATOR
(LASER MARK)
A
SEATING
PLANE
aaa C
A2
bbb
b1xN
bbb
2
1
.015 .016 .017
0.00 .001 .002
(.005)
.006 .008 .010
.014 .016 .018
.059 .063 .067
.035 .039 .043
.020 BSC
.039 BSC
.012 .015 .017
4
.003
.004
0.37 0.40 0.43
0.00 0.03 0.05
(0.13)
0.15 0.20 0.25
0.35 0.40 0.45
1.50 1.60 1.70
0.90 1.00 1.10
0.50 BSC
1.00 BSC
0.30 0.38 0.43
4
0.08
0.10
C
A1
bxN
C A B
A
A1
A2
b
b1
D
E
e
e1
L
N
aaa
bbb
DIMENSIONS
INCHES
MILLIMETERS
MIN NOM MAX MIN NOM MAX
C A B
R0.125
E/2 LxN
N
2X R0.075
3 PLACES
e
e1
D/2
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
Land Pattern - SLP1610P4T
P1
P
DIMENSIONS
DIM
C
G
P
P1
X
X1
Y
Y1
Z
Y
Z
(C)
(Y1)
G
X
X1
INCHES
(.034)
.008
.020
.039
.008
.016
.027
(.061)
.061
MILLIMETERS
(0.875)
0.20
0.50
1.00
0.20
0.40
0.675
(1.55)
1.55
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
© 2010 Semtech Corp.
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RClamp0542T
PROTECTION PRODUCTS
Marking
Ordering Information
0542T
PIN 1
INDICATOR
YW
Part Number
Lead
Finish
Qty per
Reel
R eel Size
RClamp 0542T.TCT
Pb Free
3,000
7 Inch
RailClamp and RClamp are marks of Semtech Corporation
YW = Date Code
Tape and Reel Specification
Pin 1 Location
User Direction of feed
Device Orientation in Tape
Pin 1 in upper left towards sprocket holes
A0
1.30 +/-0.05 mm
B0
K0
1.75 +/-0.05 mm
Tape
Width
B, (Max)
D
8 mm
4.2 mm
1.5 + 0.1 mm
- 0.0 mm )
0.70 +/-0.05 mm
D1
E
0.5 mm
±0.05
1.750±.10
mm
F
K
(MAX)
P
P0
P2
T(MAX)
3.5±0.05
mm
2.4 mm
4.0±0.1
mm
4.0±0.1
mm
2.0±0.05
mm
0.4 mm
W
8.0 mm
+ 0.3 mm
- 0.1 mm
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Rd., Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
© 2010 Semtech Corp.
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