UCLAMP3305P.TCT - SEMTECH INTERNATIONAL

PROTECTION PRODUCTS

1www.semtech.com

PROTECTION PRODUCTS - MicroClampTM

uClamp3305P

Low Voltage TVS

for ESD Protection

Description Features

Circuit Diagram Package

Revision 02/15/2008

The μClampTM series of TVS arrays are designed to

protect sensitive electronics from damage or latch-up

due to ESD, lightning, and other voltage-induced

transient events. Each device will protect up to four

lines operating at 3.3 volts.

The μClampTM3305P is a solid-state device designed

specifically for transient suppression. It is constructed

using Semtech’s proprietary EPD process technology.

The EPD process provides low standoff voltages with

significant reductions in leakage currents and capaci-

tance over traditional pn junction processes. They offer

desirable characteristics for board level protection

including fast response time, low clamping voltage and

no device degradation.

The μClamp3305P may be used to meet the immunity

requirements of IEC 61000-4-2, level 4 (±15kV air,

±8kV contact discharge). It is packaged in an ultra

small SLP1616P6 package with a low profile of only

0.58mm. The leads are spaced at a pitch of 0.5mm

and are finished with lead-free NiPdAu. The small

package makes it ideal for use in portable electronics

such as cell phones, digital still cameras, and notebook

computers.

Applications

Mechanical Characteristics

Cellular handsets and accessories

Notebooks and handhelds

MP3 Players

Digital cameras

Portable instrumentation

PDA’s

Transient protection for data lines to

IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)

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

Small package for use in portable electronics

Protects five I/O lines

Working voltage: 3.3V

Low leakage current

Low operating and clamping voltages

Solid-state silicon-avalanche technology

SLP1616P6 package

RoHS/WEEE Compliant

Nominal Dimensions: 1.6 x 1.6 x 0.58 mm

Lead Pitch: 0.5mm

Lead Finish: NiPdAu

Marking : Orientation Mark and Marking Code

Packaging : Tape and Reel

6 Pin SLP package (Bottom Side View)

1.6 x 1.6 x 0.58mm (Nominal)

Device Schematic

Center Tab (GND)

13456

0.6

1.6

0.5

PROTECTION PRODUCTS

uClamp3305P

Absolute Maximum Rating

Electrical Characteristics (T=25oC)

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02-/+

51-/+

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521+ot55-C°

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GTS

051+ot55-C°

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egatloVffO-dnatSesreveRV

MWR

3.3V

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Aμ2=5.39.36.4V

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Am05=8.2V

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MWR

V3.3=50.05.0Aμ

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sμ02/8=pt,A1=

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5.5V

egatloVgnipmalCV

sμ02/8=pt,A5=

dnGotO/IynA

0.8V

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sμ02/8=pt,A1=

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4.2V

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dnGotnipO/I

zHM1=f,V0=

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dnGotnipO/I

zHM1=f,V3.3=

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nipO/IotnipO/I

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nipO/IotnipO/I

zHM1=f,V3.3=

5.7Fp

PROTECTION PRODUCTS

uClamp3305P

Typical Characteristics

Non-Repetitive Peak Pulse Power vs. Pulse Time

100

110

0 25 50 75 100 125 150

Ambient Temperature - TA (oC)

% of Rated Power or IPP

Power Derating Curve

Clamping Voltage vs. Peak Pulse Current

Normalized Capacitance vs. Reverse Voltage ESD Clamping

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

0.01

0.1

0.1 1 10 100 1000

Pulse Duration - tp (µs)

Peak Pulse Power - PPP (kW)

Forward Voltage vs. Forward Current

0123456

Forward Current - IF (A)

Forward Voltage - VF (V)

Waveform

Parameters:

tr = 8μs

td = 20μs

0.2

0.4

0.6

0.8

1.2

0 0.5 1 1.5 2 2.5 3 3.5

Reverse Volt age - VR (V)

CJ(VR) / CJ(VR=0)

f = 1 MHz

Line-Ground

Line-Line

0123456

Peak Pulse Current - IPP (A)

Clamping Voltage - VC (V)

Waveform

Parameters:

tr = 8μs

td = 20μs

PROTECTION PRODUCTS

uClamp3305P

Insertion Loss S21 - LtoL (I/O to I/O) Insertion Loss S21 -LtoG (I/O to Pin 2)

2 3 4

START

. 030 MHz 3

STOP 000

. 000 000 MHz

CH1 S21 LOG 6 dB / REF 0 dB

1: -3.0155 dB

260 MHz

2: -7.4637 dB

900 MHz

3: -9.2053dB

1.8 GHz

4: -9.9280 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

2 3 4

START

. 030 MHz 3

STOP 000

. 000 000 MHz

CH1 S21 LOG 6 dB / REF 0 dB

1: -3.0041 dB

532 MHz

2: -4.0655 dB

900 MHz

3: -6.1405dB

1.8 GHz

4: -8.0944 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

Crosstalk S21 (I/O to Pin 4)

START

. 030 MHz 3

STOP 000

. 000 000 MHz

CH1 S21 LOG 20 dB / REF 0 dB

PROTECTION PRODUCTS

uClamp3305P

Device Connection Options

The μClamp3305P is designed to protect 5 signal lines

with an operating voltage of 0 to 3.3V. It will present a

high impedance to the protected line up to 3.3 volts. It

will “turn on” when the line voltage exceeds 3.5 volts.

The device is unidirectional and may be used on lines

where the signal polarity is above ground.

Pin 1,3,4,5,6 are connected to I/O signals. The center

tab is connected to system ground. Pin 2 should be left

open or not connected. All signal lines and ground

should be made with the lowest impedance and

inductance path as possible. This will improve signal

quality of the lines and keep the clamping voltage as low

as possible during a fast transient.

Due to the “snap-back” characteristics of the low

voltage TVS, it is not recommended that the I/O line be

directly connected to a DC source greater than snap-

back votlage (VSB) as the device can latch on.

EPD TVS Characteristics

These devices are constructed using Semtech’s

proprietary EPD technology. The structure of the EPD

TVS is vastly different from the traditional pn-junction

devices. At voltages below 5V, high leakage current

and junction capacitance render conventional ava-

lanche technology impractical for most applications.

However, by utilizing the EPD technology, these devices

can effectively operate at 3.3V while maintaining

excellent electrical characteristics.

The EPD TVS employs a complex nppn structure in

contrast to the pn structure normally found in tradi-

tional silicon-avalanche TVS diodes. The EPD mecha-

nism is achieved by engineering the center region of

the device such that the reverse biased junction does

not avalanche, but will “punch-through” to a conduct-

ing state. This structure results in a device with supe-

rior DC electrical parameters at low voltages while

maintaining the capability to absorb high transient

currents.

Applications Information

Figure 1 - Circuit Diagram

IPP

ISB

IPT

RWM VV PT VC

Figure 3 - EPD TVS IV Characteristic Curve

Figure 2 - Layout Example

Center Tab (GND)

13456

PROTECTION PRODUCTS

6www.semtech.com

PROTECTION PRODUCTS - MicroClampTM

uClamp3305P

Low Voltage TVS

for ESD Protection

Figure 3 - μClamp3305P Spice Model

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I/O

Applications Information - Spice Model

PROTECTION PRODUCTS

uClamp3305P

Outline Drawing - SLP1616P6

Land Pattern - SLP1616P6

bxN

E/2

LxN

1.701.50

.067.059

1.50 1.70.067.059

INCHES

.020 BSC

b.008

bbb

aaa

.010

.041

DIM

MIN

0.00

.020

0.30

0.20.012 0.25

.010

0.40

1.30

0.25

1.05

.004

.003

.013

.063

.047

.016

.051

0.08

0.10

0.33

1.60

1.20

0.50 BSC

MILLIMETERS

MAX

0.05

0.65

DIMENSIONS

MIN

0.00

NOM

(.005)

.023

.001

MAX

.002

.026

NOM

0.50

0.03

(0.13)

0.58

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS.

NOTES:

E1 .010 .016 .020 0.25 0.40 0.50

1.60.063E

SEATING

PLANE

aaa C

PIN 1

INDICATOR

(LASER MARK)

bbb C A B

D/2

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

FUNCTIONAL PERFORMANCE OF THE DEVICE.

FAILURE TO DO SO MAY COMPROMISE THE THERMAL AND/OR

SHALL BE CONNECTED TO A SYSTEM GROUND PLANE.

THERMAL VIAS IN THE LAND PATTERN OF THE EXPOSED PAD3.

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

NOTES:

DIM

MILLIMETERSINCHES

1.52

.012

.025

.035

.020

.060

0.30

0.63

0.50

0.89

DIMENSIONS

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

2.15.085Z

.018H 0.45

G(C)

K.051 1.30

PROTECTION PRODUCTS

uClamp3305P

Marking Ordering Information

MicroClamp, uClamp and μClamp are marks of Semtech

Corporation

Tape and Reel Specification

epaT

htdiW )xaM(,BD1DE F

)XAM( P0P2P)XAM(TW

mm8 mm2.4

)561.(

mm1.0+5.1

mm0.0-

500.+95.0(

)000.-

mm8.0

50.0±

)130.(

01.±057.1

)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

)20

0.±970.(

mm4.0

)610.(

mm0.8

mm3.0+

mm1.0-

)210.±213.(

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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Y = year

W = Week

3305P

Device Orientation in Tape

(Pin 1 upper left towards sprocket holes)

0A0B0K

mm01.0-/+87.1mm01.0-/+87.1mm01.0-/+96.0