UCLAMP3301H.TCT

uClamp3301H Low Voltage μClamp[TM] for ESD and CDE Protection 

## -MicroClamp **[®]** 

## **PROTECTION PRODUCTS** 

## Description 

The μClamp[®] series of Transient Voltage Suppressors (TVS) are designed to replace multilayer varistors (MLVs) in portable applications such as cell phones, notebook computers, and PDAs.  They offer superior electrical characteristics such as lower clamping voltage and no device degradation when compared to MLVs.  They are designed to protect sensitive semiconductor components from damage or upset due to electrostatic discharge (ESD), lightning, electrical fast transients (EFT), and cable discharge events (CDE). 

The μClamp[®] 3301H is constructed using  Semtech’s proprietary EPD process technology. The EPD process provides low standoff voltages with significant reductions in leakage currents and capacitance over siliconavalanche diode processes.  They feature a true operating voltage of 3.3 volts for superior protection when compared to traditional pn junction devices. 

The μClamp3301H is in a 2-pin SOD-523 package. Each device will protect one unidirectional line operating at 3.3 volts.  They give the designer the flexibility to protect one line in applications where arrays are not practical.  They may be used to meet the ESD immunity requirements of IEC 61000-4-2. 

## PRELIMINARY 

## Features 

- Transient protection for data lines to IEC 61000-4-2 (ESD) ±30kV (air), ±30kV (contact) IEC 61000-4-4 (EFT) 40A (tp = 5/50ns) Cable Discharge Event (CDE) 

- Small SOD-523 package 

- Protects one data line 

- Low clamping voltage 

- Working voltage: 3.3V 

- Low leakage current 

- Solid-state silicon-avalanche technology 

## Mechanical Characteristics 

- EIAJ SOD-523 package 

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

- Molding compound flammability rating: UL 94V-0 

- Nominal Dimensions: 1.7 x 0.9 x 0.7mm 

- Marking : Marking code, cathode band 

- Packaging: Tape and Reel 

- Lead Finish: Matte tin 

## Applications 

- Cellular Handsets & Accessories 

- Notebooks & Handhelds 

- Portable Instrumentation 

- Keypads, Side Keys, LCD Displays 

- Notebooks & Desktop Computers 

- Digital Cameras 

- MP3 Players 

## Dimensions 

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1.70<br>0.35 1 .30<br>0.9<br>0.70<br>**----- End of picture text -----**<br>


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Nominal Dimensions  (mm)<br>**----- End of picture text -----**<br>


## Schematic & Pin Configuration 

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SOD-523  (Top View)<br>**----- End of picture text -----**<br>


www.semtech.com 

Revision 11/13/2012 

1 

uClamp3301H 

## PROTECTION PRODUCTS 

## PRELIMINARY 

|PRELIMINARY<br>PROTECTION PRODUCTS|PRELIMINARY<br>PROTECTION PRODUCTS|PRELIMINARY<br>PROTECTION PRODUCTS|PRELIMINARY<br>PROTECTION PRODUCTS|
|---|---|---|---|
|Absolute Maximum Rating||||
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|)s<br>μ<br>0<br>2<br>/<br>8<br>=<br>p<br>t(<br>r<br>e<br>w<br>o<br>P<br>e<br>slu<br>P<br>k<br>a<br>e<br>P|P k<br>p|0<br>4|stt<br>a<br>W|
|(<br>t<br>n<br>e<br>rr<br>u<br>C<br>e<br>slu<br>P<br>k<br>a<br>e<br>P<br>m<br>u<br>m<br>ix<br>a<br>M<br>)s<br>μ<br>0<br>2<br>/<br>8<br>=<br>p<br>t|I p<br>p|5|s<br>p<br>m<br>A|
|)riA<br>(<br>2<br>-<br>4<br>-<br>0<br>0<br>0<br>1<br>6<br>C<br>EI<br>r<br>e<br>p<br>D<br>S<br>E<br>1<br>)tc<br>a<br>t<br>n<br>o<br>C<br>(<br>2<br>-<br>4<br>-<br>0<br>0<br>0<br>1<br>6<br>C<br>EI<br>r<br>e<br>p<br>D<br>S<br>E<br>1|V<br>D<br>S<br>E|0<br>3<br>-/<br>+<br>0<br>3<br>-/<br>+|V<br>k|
|e<br>r<br>u<br>t<br>a<br>r<br>e<br>p<br>m<br>e<br>T<br>g<br>nit<br>a<br>r<br>e<br>p<br>O|TJ|5<br>2<br>1<br>+<br>o<br>t<br>5<br>5<br>-|C<br>°|
|e<br>r<br>u<br>t<br>a<br>r<br>e<br>p<br>m<br>e<br>T<br>e<br>g<br>a<br>r<br>o<br>t<br>S|T<br>G<br>T<br>S|0<br>5<br>1<br>+<br>o<br>t<br>5<br>5<br>-|C<br>°|



## Electrical Characteristics (T=25[o] C) 

||||||||
|---|---|---|---|---|---|---|
|r<br>e<br>t<br>e<br>m<br>a<br>r<br>a<br>P|l<br>o<br>b<br>m<br>y<br>S|s<br>n<br>oiti<br>d<br>n<br>o<br>C|m<br>u<br>m<br>i<br>n<br>i<br>M|l<br>a<br>ci<br>p<br>y<br>T|m<br>u<br>m<br>ix<br>a<br>M|s<br>ti<br>n<br>U|
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|e<br>g<br>a<br>tlo<br>V<br>k<br>c<br>a<br>B<br>-<br>p<br>a<br>n<br>S|V B<br>S|I B<br>S<br>A<br>m<br>0<br>5<br>=|8<br>.<br>2|||V|
|t<br>n<br>e<br>rr<br>u<br>C<br>e<br>g<br>a<br>k<br>a<br>e<br>L<br>e<br>sr<br>e<br>v<br>e<br>R|IR|V<br>M<br>W<br>R<br>V<br>3<br>.<br>3<br>=||5<br>0<br>.<br>0|5<br>.<br>0|A<br>μ|
|e<br>g<br>a<br>tlo<br>V<br>g<br>nip<br>m<br>alC|VC|I P<br>P<br>s<br>μ<br>0<br>2<br>/<br>8<br>=<br>p<br>t<br>,<br>A<br>1<br>=|||5<br>.<br>5|V|
|e<br>g<br>a<br>tlo<br>V<br>g<br>nip<br>m<br>alC|VC|I P<br>P<br>s<br>μ<br>0<br>2<br>/<br>8<br>=<br>p<br>t<br>,<br>A<br>5<br>=|||8|V|
|e<br>g<br>a<br>tlo<br>V<br>d<br>r<br>a<br>w<br>r<br>o<br>F|VF|I P<br>P<br>s<br>μ<br>0<br>2<br>/<br>8<br>=<br>p<br>t<br>,<br>A<br>1<br>=|||4<br>.<br>2|V|
|e<br>c<br>n<br>a<br>tic<br>a<br>p<br>a<br>C<br>n<br>oitc<br>n<br>u<br>J|Cj|d<br>n<br>G<br>o<br>t<br>nip<br>O<br>/I<br>VR<br>z<br>H<br>M<br>1<br>=<br>f<br>,V<br>0<br>=||5<br>2|0<br>3|F<br>p|
|||d<br>n<br>G<br>o<br>t<br>nip<br>O<br>/I<br>VR<br>z<br>H<br>M<br>1<br>=<br>f<br>,V<br>3<br>.<br>3<br>=||4<br>1||F<br>p|



## Notes 

1)ESD gun return path connected to ESD ground reference plane. 

www.semtech.com 

© 2012 Semtech Corporation 

2 

uClamp3301H 

## PROTECTION PRODUCTS 

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PRELIMINARY<br>**----- End of picture text -----**<br>


## Typical Characteristics 

## Non-Repetitive Peak Pulse Power vs. Pulse Time 

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1000<br>100<br>10<br>DR040412-40<br>1<br>0.1 1 10 100<br>Pulse Duration - tp (µs)<br> (W)<br>PP<br>Peak Pulse Power - P<br>**----- End of picture text -----**<br>


## Normalized Capacitance vs. Reverse Voltage 

## Clamping Voltage vs. Peak Pulse Current 

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10<br>9<br>8<br>7<br>6<br>5<br>4<br>3<br>Waveform<br>2  Parameters:<br>tr = 8μs<br>1<br>td = 20μs<br>0<br>0 1 2 3 4 5<br>Peak Pulse Current - IPP (A)<br> (V)<br>C<br>Clamping Voltage - V<br>**----- End of picture text -----**<br>


## TLP Characteristic 

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30<br>1.2<br>Transmission Line Pulse Test<br>f = 1 MHz<br>(TLP) Settings:<br>25 tp = 100ns, tr = 0.2ns,<br>1 ITLP and VTLP averaging window:<br> t1 = 70ns to t2 = 90ns<br>20<br>0.8<br>Rdyn=0.30Ω<br>15<br>0.6<br>10<br>0.4<br>5<br>0.2<br>0<br>0<br>0 5 10 15<br>0 0.5 1 1.5 2 2.5 3 3.5<br>Reverse Voltage - VR (V) Voltage (V)<br>ESD Clamping (+8kV Contact per IEC 61000-4-2) ESD Clamping (-8kV Contact per IEC 61000-4-2)<br>70 10<br>Measured with 50 Ohm scope input<br>0<br>60 impedance, 2GHz bandwidth.<br>Corrected for 50 Ohm, 20dB  -10<br>attenuator. ESD gun return path<br>50 connected to ESD ground plane -20<br>40 -30<br>-40<br>30<br>-50<br>20 -60<br>-70 Measured with 50 Ohm scope input<br>10 impedance, 2GHz bandwidth.<br>-80 Corrected for 50 Ohm, 20dB<br>0 attenuator. ESD gun return path<br>-90 connected to ESD ground plane<br>-10 -100<br>-10 10 30 50 70 -10 10 30 50 70<br>Time (ns) Time (ns)<br>Current (A)<br>Cj(VR) / Cj(VR=0V)<br>Voltage (V) Voltage (V)<br>**----- End of picture text -----**<br>


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© 2012 Semtech Corporation 

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uClamp3301H 

PRELIMINARY 

## PROTECTION PRODUCTS 

## Applications Information 

## Semtech Low Voltage TVS 

Conventional TVS diodes are silicon avalanche, p-n junction devices designed to operate at voltages as low as 5 volts.  However, many of today's semiconductor devices operate at voltages below 5 volts, and thus require lower voltage protection devices.  Unfortunately, for operating voltages below 5 volts, conventional TVS diode technology becomes impractical.  This is due to the adverse effects of high leakage current and high capacitance caused by the high impurity concentrations that are needed to lower the device voltage below 5 volts.  Semtech's proprietary low voltage EPD device technology was developed to provide protection for today's circuits operating at voltages below 5 volts.  Unlike conventional TVS diodes, the EPD device utilizes a complex four layer (n-p-p-n) structure.  The construction of these devices results in very low operating voltage without the adverse effects mentioned above. 

## Device Operation 

Since the EPD TVS devices use a 4-layer structure, they exhibit a slightly different IV characteristic curve when compared to conventional devices.  Figure 1 compares the IV characteristic curves of a low voltage TVS with a working voltage (VRWM) of 3.3 volts to a conventional device with a working voltage of 5 volts. During normal operation, each device represents a high-impedance to the circuit up to its working voltage. During an ESD event, they will begin to conduct and will enter a low impedance state.  For the 3.3 volt device, this happens  when the punch-through voltage (VPT) is exceeded.  Unlike a conventional 5 volt device, the low voltage TVS will exhibit a slight negative resistance characteristic as it conducts current.  This characteristic aids in lowering the clamping voltage of the device. However, the device can latch up if a DC bias voltage is present.  The reason being that in order for the device to turn off, the voltage must fall below the snap-back voltage (VSB).  This value is normally a minimum of  2.8 volts.  If the device is biased above the 2.8 volts, it will never fall below the snap-back voltage and will therefore stay in a conducting state. 

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0.05<br>Low Voltage TVS<br>� Working Voltage  (VRWM): Maximum rated  0.04 VSB Semtech  5 Volt TVS<br>operating voltage at which the device will<br>appear as a high impedance to the<br>protected circuit.<br>0.03<br>� Punch-Through Voltage  (VPT): Minimum  Semtech 3.3 Volt TVS<br>rated voltage at which the device will<br>become a low impedance (i.e. Minimum  0.02<br>Turn-On Voltage).  When VPT is exceeded,<br>the device will conduct.<br>� Snap-Back Voltage  (VSB): Minimum rated  0.01 VPT<br>voltage when the device is in a conducting<br>state measured at ISB = 50mA.  This<br>voltage is less than the working voltage.   0 0 1 2 3 4 5 6 7 8 9 10<br>The voltage must fall below VSB for the<br>device to turn off.  -0.01 VRWM VRWM VBR<br>� Clamping Voltage  (VC): Maximum voltage<br>drop across the device at a defined peak<br>pulse current (IPP).  This is the voltage  -0.02<br>seen by the protected circuit during a<br>transient event.<br>-0.03<br>Voltage - V (V)<br>Current - I (A)<br>**----- End of picture text -----**<br>


Figure 1 - 3.3 volt vs. 5 volt TVS IV Curve 

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© 2012 Semtech Corporation 

uClamp3301H 

PRELIMINARY 

PROTECTION PRODUCTS 

## Outline Drawing - SO-8Outline Drawing - SOD-523 

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**----- Start of picture text -----**<br>
E<br>E1 B DIMENSIONS<br>INCHES MILLIMETERS<br>DIM<br>MIN NOM MAX MIN NOM MAX<br>Abc .009.019.003 .023-- .013.008.027 0.250.500.10 0.60-- 0.350.200.70<br>D .027 .031 .035 0.70 0.80 0.90<br>D EE1 .059.043 .063.047 .067.051 1.501.10 1.601.20 1.701.30<br>L .003 .008 .011 0.10 0.20 0.30<br>2X b aaaL1 .003 .005.008 .008 0.10 0.150.20 0.20<br>aaa C A B<br>A<br>A c<br>SEATING<br>PLANE<br>L<br>C<br>NOTES: L1<br>**----- End of picture text -----**<br>


1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 

## Land Pattern - SOD-523 

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Y<br>DIMENSIONS<br>X DIM INCHES MILLIMETERS<br>C (.057) (1.45)<br>G G .024 0.60<br>X .018 0.45<br>C Y .033 0.85<br>Z .090 2.30<br>Z<br>NOTES:<br>1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY<br>CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR<br>COMPANY'S MANUFACTURING GUIDELINES ARE MET<br>**----- End of picture text -----**<br>


www.semtech.com 

© 2012 Semtech Corporation 

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uClamp3301H 

PRELIMINARY 

## PROTECTION PRODUCTS 

## Marking Codes 

## Ordering Information 

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3H<br>**----- End of picture text -----**<br>


|||tr<br>a<br>P||r<br>e<br>b<br>m<br>u<br>N|||e<br>p<br>y<br>t<br>Q<br>l<br>e<br>e<br>R|r|l<br>e<br>e<br>R<br>e<br>zi<br>S|
|---|---|---|---|---|---|---|---|---|---|
|u||p<br>m<br>alC||T.<br>H<br>1<br>0<br>3<br>3||T<br>C|0<br>0<br>0<br>,<br>3||h<br>c<br>nI<br>7|
|u|p<br>m<br>alC||T.<br>H<br>1<br>0<br>3<br>3||T<br>H||0<br>0<br>0<br>,<br>6||h<br>c<br>nI<br>7|



MicroClamp, uClamp and μClamp are trademarks of Semtech Corporation 

## Carrier Tape Specification 3,000 piece Reel, 4mm Pitch Between Devices 

Tape Specifications 

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**----- Start of picture text -----**<br>
Device Orientation in Tape (Every Other Pocket Populated)<br>3H 3H 3H 3H 3H 3H 3H<br>**----- End of picture text -----**<br>


www.semtech.com 

© 2012 Semtech Corporation 

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uClamp3301H 

PRELIMINARY 

## PROTECTION PRODUCTS 

## 6,000 piece Reel, 2mm Pitch Between Devices 

Tape Specifications 

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**----- Start of picture text -----**<br>
3H 3H 3H 3H 3H 3H 3H 3H 3H 3H 3H 3H 3H 3H<br>**----- End of picture text -----**<br>


Device Orientation in Tape (Every Pocket Populated) 

## Contact Information 

Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111   FAX (805)498-3804 

www.semtech.com 

© 2012 Semtech Corporation 

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