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RClamp0502BA

Ultra-Low Capacitance TVS

for ESD and CDE Protection

PROTECTION PRODUCTS - RailClamp®®

®®

Description Features

Dimensions Schematic & PIN Configuration

Revision 4/19/2010

RailClamp® TVS diodes are specifically designed to

protect sensitive components which are connected to

high-speed data and transmission lines from overvolt-

age caused by ESD (electrostatic discharge), CDE

(cable discharge events), and EFT (electrical fast

transients).

The RClamp®0502BA has a typical capacitance of only

0.60pF (pin 1 to 2). This means it can be used on

circuits operating in excess of 3GHz with minimal 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 com-

patible with both lead free and SnPb assembly tech-

niques. 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.

Applications

Mechanical Characteristics

Mobile Display Digital Interface (MDDI)

USB 2.0

Firewire Ports

GaAs Photodetector Protection

HBT Power Amp Protection

Infiniband Transceiver Protection

Transient protection for high-speed data lines to

IEC 61000-4-2 (ESD) ±18kV (air), ±12kV (contact)

IEC 61000-4-4 (EFT) 40A (5/50ns)

Protects up to two I/O lines

Ultra-Low capacitance (<1pF)

No insertion loss to >3.0GHz>3.0GHz

>3.0GHz>3.0GHz

>3.0GHz

Low profile (<1mm)

Low leakage current and clamping voltage

Low operating voltage: 5.0V

Solid-state silicon-avalanche technology

SC-75 (SOT-523) package

Lead Finish: Matte Tin

Pb-Free, Halogen Free, RoHS/WEEE Compliant

Molding compound flammability rating: UL 94V-0

Packaging: Tape and Reel

SC-75 3L (Top View)

1.60

1.00

BSC

0.50 BSC

0.75

0.80

Nominal Dimensions (mm)

PROTECTION PRODUCTS

RClamp0502BA

Absolute Maximum Rating

Electrical Characteristics (T=25oC)

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MWR

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2dna1sniPneewteBdna

egatloVnwodkaerBesreveRV

Am1=

3niPot2niPro1niP

2dna1sniPneewteBdna

tnerruCegakaeLesreveRI

MWR

C°52=T,V5=

3niPot2niPro1niP

2dna1sniPneewteBdna

1Aμ

egatloVgnipmalCV

sμ02/8=pt,A1=

2niPot1niP

51V

egatloVgnipmalCV

sμ02/8=pt,A5=

3niPot2niPro1niP

22V

egatloVgnipmalCV

sμ02/8=pt,A5=

2niPot1niP

52V

ecnaticapaCnoitcnuJC

zHM1=f,V0=

2niPot1niP

06.09.0Fp

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zHM1=f,V0=

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2.1Fp

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)sμ02/8=pt(tnerruCesluPkaePI

)riA(2-4-00016CEIrepDSE

)tcatnoC(2-4-00016CEIrepDSE

DSE

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521+ot55-C°

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GTS

051+ot55-C°

PROTECTION PRODUCTS

RClamp0502BA

Typical Characteristics

Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve

100

110

0 25 50 75 100 125 150

Ambien t Temperat ure - T A (oC)

% of Rated Power or IPP

Clamping Voltage vs. Peak Pulse Current

Pin 1 or Pin 2 to Pin 3

Normalized Capacitance vs. Reverse Voltage

Pin 1 or Pin 2 to Pin 3

0123456

Peak Pulse Current - I

(A)

Clamping Voltage - V

(V)

Waveform

Parameters:

tr = 8μs

td = 20μs

Normalized Capacitance vs. Reverse Voltage

Pin 1 to Pin 2

0123456

Peak Pulse Current - IPP (A)

Clamping Voltage - VC (V)

Waveform

Parameters:

tr = 8μs

td = 20μs

0.01

0.1

0.1 1 10 100 1000

Pulse Duration - tp (μs)

Peak Pulse Power - PPP (kW)

Clamping Voltage vs. Peak Pulse Current

Pin 1 to Pin 2

0.2

0.4

0.6

0.8

1.2

1.4

012345

Reve rse Volt age - VR (V )

CJ(VR) / CJ(VR=0)

f = 1 MHz 0.2

0.4

0.6

0.8

1.2

012345

Reverse Voltage - VR (V)

CJ(VR) / CJ(VR=0)

f = 1 MHz

PROTECTION PRODUCTS

RClamp0502BA

Insertion Loss S21 (Pin 1 to Pin 2)

Typical Characteristics

1 2

START

. 030 MHz 3

STOP 000

000 000 MHz

CH1 S21 LOG 6 dB / REF 0 dB

1: .00460 dB

900 MHz

2: .02010 dB

1.8 GHz

3: -.08180 dB

2.5 GHz

0 dB

-6 dB

-12 dB

-18 dB

-24 dB

-30 dB

-36 dB 1

GHz

100

MHz 3

GHz

MHz

Insertion Loss S21 (Pin 1 or Pin 2 to Pin 3)

1 2

START

. 030 MHz 3

STOP 000

. 000 000 MHz

CH1 S21 LOG 6 dB / REF 0 dB

1: .03430 dB

900 MHz

2: .07870 dB

1.8 GHz

3: .28040 dB

2.5 GHz

0 dB

-6 dB

-12 dB

-18 dB

-24 dB

-30 dB

-36 dB 1

GHz

100

MHz 3

GHz

MHz

Analog Crosstalk

START

. 030 MHz 3

STOP 000

000 000 MHz

CH1 S21 LOG 20 dB / REF 0 dB

ESD Clamping

(4kV Contact per IEC 61000-4-2)

Note: Data is taken with a 10x attenuator

ESD Clamping

(8kV Contact per IEC 61000-4-2)

Note: Data is taken with a 10x attenuator

PROTECTION PRODUCTS

RClamp0502BA

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 com-

pared 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.

Figure 1. Pin Configuration

Applications Information

PROTECTION PRODUCTS

RClamp0502BA

Outline Drawing -SC-75 (SOT-523)

Land Pattern -SC-75 (SOT-523)

-A- -B-

2. -H-

bbb .008 0.20

aaa .004 0.10

PLANE

SEATING

SEATING PLANE

DETAIL A

aaa C

SEE DETAIL A

E1 E

bxN

INCHES

.063

.005

.003

.057

DIM

MIN

.000

.023

0.30

0.20

1.75

0.15

0.10

1.45

.039 BSC

.063

.012

.008

.069

1.00 BSC

1.60

MILLIMETERS

MAX

0.10

0.90

MIN

DIMENSIONS

0.00

MAXNOM

-.004

.035

NOM

0.60 -

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

NOTES:

OR GATE BURRS.

DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

1.701.50.059 .067

e1 .020 BSC 0.50 BSC

L(.009) (0.22)

A2 .023 .030 0.750.60.031 0.80

E1 .031 0.80

SIDE VIEW

bbb C A B

0.850.75

N3 3

0-8°0°8°0° -

.033.029

DATUMS AND TO BE DETERMINED AT DATUM PLANE

P 1.00.039

p1 .020 0.50

NOTES:

1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

DIM

MILLIMETERSINCHES

(1.40)

.031

.087

.016

.024

(.055)

0.80

2.20

0.40

0.60

DIMENSIONS

ZCG

PROTECTION PRODUCTS

RClamp0502BA

Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Rd., Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

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Ordering Information

Tape and Reel Specification

RailClamp and RClamp are registered marks of Semtech Corporation

Marking

Device Orientation in Tape

epaT

htdiW )xaM(,BD

)NIM( EF

)XAM( P0P2P)XAM(TW

mm8 mm2.4

)561.(

mm1.0+5.1

mm0.0-

500.+95.0(

)000.-

mm0.1

)930.(

01.±057

)400.±960.(

50.0±5.3

)200.±831.(

mm4.2

)490.(

1.0±0.4

-00.±751.(

1.0±0.4

-00.±751.(

-m50.0±0.2

)200.±970.(

mm4.0

)610.(

mm3.8

)210.±213.(

YW = Date Code

P 5

0A0B0K

mm51.0-/+58.1mm51.0-/+58.1mm51.0-/+78.0