RClamp®1521PQ
Ultra-Low Capacitance
1-Line ESD Protection
PROTECTION PRODUCTS - RailClamp®
Description
Features
u Transient protection for data lines to
The RailClamp family is a series of ultra low capacitance
Transient Voltage Suppressors (TVS) 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 RClamp®1521PQ has a maximum capacitance of
only 0.5pF. This allows it to 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).
The RClamp1521PQ is in a 2-pin, RoHS/WEEE compliant, SLP1006P2 package measuring 1.0 x 0.6 x 0.5mm.
The leads are spaced at a pitch of 0.65mm and feature
a lead-free finish. Each device will protect one highspeed line operating at 15 volts. It gives the designer
the flexibility to protect single lines in applications where
arrays are not practical. The combination of small size,
low capacitance, and high ESD surge capability makes
them ideal for use in applications such as cellular
phones and high-power USB.
The RClamp1521PQ is qualified to AEC-Q100 Grade 1
for Automotive use.
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (tp = 5/50ns)
Cable Discharge Event (CDE)
u
u
u
u
u
u
u
Ultra-small package (1.0 x 0.6 x 0.5mm).
Protects one data or I/O line.
Low capacitance: 0.3pF typical.
Low clamping voltage.
Low operating voltage: 15V.
Solid-state silicon-avalanche technology.
AEC-Q100 Grade1 Qualified.
Mechanical Characteristics
u
u
u
u
u
u
SLP1006P2 package.
Molding compound flammability rating: UL 94V-0.
Marking: Marking code.
Packaging : Tape and Reel.
Lead Finish: NiPdAu.
RoHS/WEEE Compliant
Applications
u
u
u
u
u
Package Dimensions
Cellular Handsets & Accessories.
USB Ports.
PCI Express.
Serial ATA.
Automotive Applications.
Schematic & Pin Configuration
#7
7/
7/7#1%-&-2#2
#1%-&-2%2
Revised 3/15/2013
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RClamp1521PQ
PROTECTION PRODUCTS
Absolute Maximum Ratings
Rating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
PPK
120
W
Peak Pulse Current (tp = 8/20µs)
IPP
4
A
ESD per IEC 61000-4-2 (Air)
±15
VESD
kV
ESD per IEC 61000-4-2 (Contact)
±8
Operating Temperature
Storage Temperature
TJ
-40 to +125
O
TSTG
-55 to +150
O
C
C
Electrical Characteristics (T=25OC unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Reverse Stand-Off Voltage
VRWM
T = -40 to +125°C
Reverse Breakdown Voltage
VBR
It = 1mA
T = -40 to +125°C
Reverse Leakage Current
IR
Typ.
Max.
Units
15
V
16.7
V
T = 25°C
1
T = 125°C
5
VRWM = 15V,
uA
Clamping Voltage
VC
IPP = 1A, tp = 8/20µs
30
V
Clamping Voltage
VC
IPP = 4A, tp = 8/20µs
35
V
0.50
pF
T = 25°C
Junction Capacitance
CJ
VR = 0V, f = 1MHz
T = 125°C
2013 Semtech Corporation.
0.30
2
1.00
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RClamp1521PQ
PROTECTION PRODUCTS
Typical Characteristics
Non-RepetitivePeak Pulse Power vs. Pulse Time
Power Derating Curve
120
10
TA = 25OC
% of Rated Power or IPP
Peak Pulse Power - PPP (kW)
100
1
0.1
80
60
40
20
DR040512:25:125:150
DR040412-120
0.01
0.1
1
10
100
0
1000
0
25
50
75
100
Ambient Temperature - TA (OC)
Pulse Duration - tp (µs)
Reverse Leakage vs. Temperature
125
150
Reverse Leakage vs. Reverse Voltage
0.20
1.5
TA = 25OC
VR = 15V
Leakage Current - IR (uA)
Leakage Current - IR (uA)
0.15
1.0
0.5
0.10
0.05
AR_IRvT
AR_IRvV
0.0
0.00
-50
0
50
Temperature (OC)
100
0
150
5
10
15
Reverse Voltage - VR (V)
Capacitance vs. Temperature
Breakdown Voltage vs. Temperature
22
2.5
IR = 1mA
VR = 15V
VR = 0V
Breakdown Voltage - VBR (V)
Junction Capacitance - CJ (pF)
2.0
1.5
1.0
21
20
19
0.5
AR-BVvT
AR_CJvT
18
0.0
-50
0
2013 Semtech Corporation.
50
Temperature (OC)
100
-50
150
0
50
100
150
Temperature (OC)
3
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RClamp1521PQ
PROTECTION PRODUCTS
Typical Characteristics (Continued)
ESD Positive Clamp (8kV Contact per IEC 61000-4-2)
ESD Negative Clamp (8kV Contact per IEC 61000-4-2)
400
100
TA = 25OC
Corrected for 40dB attenuation.
Measured with 50Ω, 40dB attenuator;
50Ω Scope Input Impedance.
0
Clamping Voltage - VC (V)
Clamping Voltage - VC (V)
300
TA = 25OC
Corrected for 40dB attenuation.
Measured with 50Ω, 40dB attenuator;
50Ω Scope Input Impedance.
200
100
-100
-200
-300
0
AR_ESD NEG
AR_ESD POS
-400
-100
-20
0
20
40
Time (ns)
60
80
-20
100
0
20
40
Time (ns)
60
80
100
TLP IV Curve (Typical Either Direction)
30
TLP Current - IDUT (A)
TA = 25OC
Typical Either Direction
20
RDYN = 1.07Ω
4A to 16A
10
AR_TLP_BI
0
0
10
20
30
40
Clamping Voltage - VC (V)
2013 Semtech Corporation.
50
60
4
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RClamp1521PQ
PROTECTION PRODUCTS
Applications Information
Device Connection Options
These low capacitance TVS diodes are designed to
provide common mode protection for one high-speed line
or differential protection for one line pair. The device is
bidirectional and may be used on lines where the signal
polarity is positive and negative.
Equivalent Circuit Diagram
Circuit Board Layout Recommendations for
Suppression of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
u Place the TVS near the input terminals or connectors
to restrict transient coupling.
u Minimize the path length between the TVS and the
protected line.
u Minimize all conductive loops including power and
ground loops.
u The ESD transient return path to ground should be
kept as short as possible.
u Never run critical signals near board edges.
u Use ground planes whenever possible.
2013 Semtech Corporation.
#1%-&-2&2
5
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RClamp1521PQ
PROTECTION PRODUCTS
Applications Information - Spice Model
4
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#1%-&-2,2
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RClamp1521PQ Spice Model
RClamp1521PQ Spice Parameters
Parameter
Unit
D1 (LCRD)
D2 (LCRD)
D3 (TVS)
IS
(A)
1.0E-20
1.0E-20
2.0E-12
BV
(V)
100
100
19.5
VJ
(V)
0.7
0.7
0.6
RS
(Ohm)
0.458
0.89
0.8
IBV
(A)
1E-3
1E-3
1E-3
CJO
(F)
0.4E-12
0.4E-12
56E-12
TT
(s)
2.541E-9
2.541E-9
2.541E-9
M
--
0.01
0.01
0.23
N
--
1.1
1.1
1.1
EG
(eV)
1.11
1.11
1.11
2013 Semtech Corporation.
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RClamp1521PQ
PROTECTION PRODUCTS
Outline Drawing - {Insert Package Type}
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2013 Semtech Corporation.
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RClamp1521PQ
PROTECTION PRODUCTS
Marking
Ordering Information
Part Number
Qty per Reel
Reel Size
RClamp1521PQTCT
3000
7 Inch
Note: Lead finish is lead-free NiPdAu
RailClamp and RClamp are marks of Semtech Corporation.
#1%-&-2-2
Tape and Reel Specification
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: 3"
;: 3
(<=
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A0
B0
K0
B1
D
D1
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F
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P
P0
P2
t
W
0.69
±0.10
1.19
±0.10
0.66
±0.10
Not
Spec’d
1.50
+0.1
-0.0
Not
Spec’d
1.75
±0.10
3.50
±0.05
Not
Spec’d
4.00
±0.10
4.00
±0.10
2.00
±0.05
Not
Spec’d
8.0
+0.3
-0.1
Ref KCT00078 Rev0
Contact Information for Semtech International AG
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Tel: 886-2-2748-3380
Fax: 886-2-2748-3390
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Fax: 49-(0)8161-140-124
Semtech International AG is a wholly-owned subsidiary of Semtech Corporation, which has its headquarters in the
U.S.A.
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