PROTECTION PRODUCTS
1www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS - RailClamp®®
®®
®
RClamp3521P
Ultra-Low Capacitance
1-Line, 3.5V ESD protection
Description Features
Dimensions Schematic & Pin Configuration
Revision12/13/2013
Applications
Mechanical Characteristics
Transient protection for data lines to
IEC 61000-4-2 (ESD) ±17kV (air), ±12kV (contact)
IEC 61000-4-4 (EFT) 40A (tp = 5/50ns)
Cable Discharge Event (CDE)
Ultra-small package (1.0 x 0.6 x 0.5mm)
Protects one data or I/O line
Low capacitance: 0.40pF
Dynamic Resistance: 0.47 Ohms Typical
Low ESD clamping voltage
Operating voltage: 3.5V
Solid-state silicon-avalanche technology
SLP1006P2 package
Molding compound flammability rating: UL 94V-0
Marking: Marking code
Packaging: Tape and Reel
Lead Finish: NiPdAu
Pb-Free, Halogen Free, RoHS/WEEE Compliant
SLP1006P2 (Bottom View)
Nominal Dimensions (mm)
USB 2.0 / USB 3.0
V-By-One
Display Port
MHL / MDDI
LVDS Interfaces
eSATA Interfaces
RClamp®3521P provides ESD protection for USB3.0
and other high-speed ports. It may be used to meet
the ESD immunity requirements of IEC 61000-4-2.
RClamp3521P is designed to minimize both the ESD
peak clamping and the TLP clamping. The dynamic
resistance is minimized (0.47 Ohms typical) for opti-
mum protection of sensitive circuits. Maximum capaci-
tance is only 0.40pF. This allows the RClamp3521P to
be used in applications operating in excess of 5GHz
without appreciable signal attenuation. These devices
are manufactured using Semtech’s proprietary low
voltage technology for superior electrical characteritics.
RClamp3521P is in a 2-pin SLP1006P2 package. It mea-
sures 1.0 x 0.6 x 0.5mm. Leads are spaced at a pitch of
0.65mm and are finished with lead-free NiPdAu. Each
device will protect one line operating up to 3.5 volts.
The combination of low peak ESD clamping, low dynamic
resistance, and low capacitance makes this device suit-
able for applications such as USB 3.0, audio and V-By-
One interfaces in portable devices.
0.65
0.50
0.60
1.0
2
1
2© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
Absolute Maximum Rating
Electrical Characteristics (T=25oC)
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pp
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1
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521+ot04-C°
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MWR
5.3V
egatloVnwodkaerBV
RB
I
RB
Am1=5.47.65.8V
tnerruCegakaeLesreveRI
R
V
MWR
V5.3=10.050.0Aμ
egatloVgnipmalCV
C
I
PP
sμ02/8=pt,A1=5.901V
egatloVgnipmalCV
C
I
PP
sμ02/8=pt,A4=5.0131V
egatloVgnipmalCDSE
2
V
C
I
PP
,A4=
sn001/2.0=plt
8.8V
egatloVgnipmalCDSE
2
V
C
I
PP
,A61=
sn001/2.0=plt
5.41V
egatloVreggirT
2
V
GIRT
sn001/2.0=plt8V
ecnatsiseRcimanyD
3,2
R
NYD
sn001/2.0=plt74.0smhO
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j
V
R
zHM1=f,V0=
33.004.0Fp
Notes
1)ESD gun return path connected to ESD ground reference plane.
2)Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to
t2 = 90ns.
3) Dynamic resistance calculated from Ipp = 4A to Ipp = 16A
4) Device is electrically symmetrical
3
© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
Typical Characteristics
Typical Insertion Loss (S21)
ESD Clamping (+8kV Contact per IEC 61000-4-2)
Capacitance vs. Reverse Voltage
TLP Characteristic
ESD Clamping (-8kV Contact per IEC 61000-4-2)
‐5
0
5
10
15
20
012345
PeakClampingVoltage‐ V
C
(V)
PeakPulseCurrent‐ I
PP
(A)
T
A
=25
O
C
tp=8x20us
‐10
10
30
50
70
90
110
130
‐10 0 1020304050607080
ClampingVoltage‐ V
C
(V)
Time(ns)
T
A
=25
O
C.
WaveformIEC61000‐4‐2+8kV.
Measuredwithandcorrectedfor50Ω,40dBAttenuator.
50ΩScopeInputImpedance,2GHzBW.
ESDGunReturnconnectedtoESDGroundPlane.
‐140
‐120
‐100
‐80
‐60
‐40
‐20
0
‐100 1020304050607080
ClampingVoltage‐ V
C
(V)
Time(ns)
T
A
=25
O
C.
WaveformIEC61000‐4‐2‐8kV.
Measuredwithandcorrectedfor50Ω,40dBAttenuator.
50ΩScopeInputImpedance,2GHz BW.
ESDGunReturnconnectedtoESDGroundPlane.
‐5
0
5
10
15
20
25
0 5 10 15 20
TLPCurrent(A)
ClampingVoltage(V)
T
A
=25
O
C
t
P
=100ns
t
R
=0.2ns
t
MEAS
=70‐90ns
Typ.BothDirections
Clamping Voltage vs. Peak Pulse Current
‐9
‐6
‐3
0
10 100 1000 10000
InsertionLoss‐ IL(dB)
Frequency(MHz)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
00.511.522.533.54
Capacitance - C
J
(pF)
Reverse Voltage - V
R
(V)
f = 1 MHz
4© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
Applications Information
USB 3.0 Layout Diagram
uClamp0511T
(1 Each)
RClamp3521P
(6 Each)
USB 3.0 Type A
Connector
VCC
SSTx+
SSTx-
D-
D+
SSRx+
SSRx-
5
© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
Outline Drawing - SO-8
Land Pattern - SLP1006P2
Outline Drawing - SLP1006P2
INCHES
.026 BSC
aaa
N
E
L
e.008
.020
DIM
AMIN
.018
.016
0.30
0.70
0.20
0.50
.003
2
.010
.024
.012
.028
0.08
2
0.25
0.60
0.65 BSC
MILLIMETERS
MAX
0.55
0.55
DIMENSIONS
MIN
0.45
NOM
.020
.020
MAX
.022
.022 NOM
0.40
0.50
0.50
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
NOTES:
1.
BOTTOM VIEW
TOP VIEW
AB
C
b
aaa C SEATING
PLANE
bbb C A B
D.035 .039 .043 0.90 1.10
1.00
.004bbb 0.10
D
E
A1
A
bxN
e
A1 .000 .001 .002 0.00 0.03 0.05
R
2x L
PIN 1 ID
R .002 .004 .006 0.05 0.10 0.15
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
NOTES:
2.
DIM
Y
G
CMILLIMETERSINCHES (0.85)
.055
.012
.022
(.033)
1.40
0.55
0.30
DIMENSIONS
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
Z
Y
(C) GZ
X .024 0.60
X
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
6© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
0A0B0K
mm01.0-/+96.0mm01.0-/+91.1mm01.0-/+66.0
Device Orientation in Tape
Note: All dimensions in mm unless otherwise specified
Marking Codes Ordering Information
Notes:
RailClamp and RClamp are trademarks of Semtech Corporation
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leeR eziSleeR
TNT.P1253pmalCR000,01hcnI7
Notes:
1) Device is electrically symmetrical
2) Marking will also include line matrix date code
33
Carrier Tape Specification
Ko Ao
Bo
Pin 1 Location
(Towards Sprocket Holes)
33
33
33
33
33
7
© 2013 Semtech Corporation www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp3521P
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
