SL24T1G - ON Semiconductor - Datasheet.Directory

July, 2009 − Rev. 7

1Publication Order Number:

SL05T1/D

SL05T1 Series

300 Watt, SOT-23 Low

Capacitance TVS for High

Speed Line Protections

This new family of TVS offers transient overvoltage protection with

significantly reduced capacitance. The capacitance is lowered by

integrating a compensating diode in series. This integrated solution

offers ESD protection for high speed interfaces such as communication

systems, computers, and computer peripherals.

Features

•TVS Diode in Series with a Compensating Diode Offers <5 pF

Capacitance

•ESD Protection Meeting IEC 61000−4−2, 4−4, 4−5

•Peak Power Rating of 300 W, 8 × 20 ms

•Bi−Direction Protection Can Be Achieved By Using Two Devices

•Flammability Rating UL 94 V−0

•Pb−Free Packages are Available

Mechanical Characteristics:

CASE: Void-free, transfer-molded, thermosetting plastic case

FINISH: Corrosion resistant finish, easily solderable

MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:

260°C for 10 Seconds

Package designed for optimal automated board assembly

Small package size for high density applications

Available in 8 mm Tape and Reel

Use the Device Number to order the 7 inch/3,000 unit reel.

Replace the “T1” with “T3” in the Device Number to order the

13 inch/10,000 unit reel.

SOT−23 (TO−236)

CASE 318

STYLE 26

(NC)

Device Package Shipping†

ORDERING INFORMATION

SL05T1 SOT−23 3000/Tape & Reel

SL15T1 SOT−23 3000/Tape & Reel

SL24T1 SOT−23 3000/Tape & Reel

Lxx M G

MARKING

DIAGRAM

See specific marking information in the device marking

column of the table on page 3 of this data sheet.

DEVICE MARKING INFORMATION

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Lxx = Device Code

xx = 05, 12, 15, or 24

M = Date Code*

G= Pb−Free Package

(Note: Microdot may be in either location)

*Date Code orientation and/or overbar may vary

depending upon manufacturing location.

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

SL24T1G SOT−23

(Pb−Free)

3000/Tape & Reel

SL15T1G SOT−23

(Pb−Free)

3000/Tape & Reel

SL05T1G SOT−23

(Pb−Free)

3000/Tape & Reel

SL12T1G SOT−23

(Pb−Free)

3000/Tape & Reel

SL05T1 Series

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MAXIMUM RATINGS

Rating Symbol Value Unit

Peak Power Dissipation @ 8x20 usec (Note 1)

@ TL ≤ 25°C

Ppk 300 W

IEC 61000−4−2 Level 4

Contact Discharge

Air Discharge

IEC 61000−4−4 EFT

IEC 61000−4−5 Lightning

Vpp

±8

±16

Total Power Dissipation on FR−5 Board (Note 2) @ TA = 25°C

Derate above 25°C

°PD°225

1.8

°mW°

mW/°C

Thermal Resistance Junction to Ambient RqJA 556 °C/W

Total Power Dissipation on Alumina Substrate (Note 3) @ TA = 25°C

Derate above 25°C

°PD°300

2.4

°mW

mW/°C

Thermal Resistance Junction−to−Ambient RqJA 417 °C/W

Junction and Storage Temperature Range TJ, Tstg −55 to +150 °C

Lead Solder Temperature − Maximum (10 Second Duration) TL260 °C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

1. Non−repetitive current pulse per Figure 2

2. FR−5 = 1.0 x 0.75 x 0.62 in.

3. Alumina = 0.4 x 0.3 x 0.024 in., 99.5% alumina

ELECTRICAL CHARACTERISTICS

(TA = 25°C unless otherwise noted)

UNIDIRECTIONAL

Symbol Parameter

IPP Maximum Reverse Peak Pulse Current

VCClamping Voltage @ IPP

VRWM Working Peak Reverse Voltage

IRMaximum Reverse Leakage Current @ VRWM

VBR Breakdown Voltage @ IT

ITTest Current

QVBR Maximum Temperature Coefficient of VBR

IFForward Current

VFForward Voltage @ IF

ZZT Maximum Zener Impedance @ IZT

IZK Reverse Current

ZZK Maximum Zener Impedance @ IZK

Uni−Directional TVS

IPP

VRWM

VCVBR

SL05T1 Series

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ELECTRICAL CHARACTERISTICS

Device

Marking

VRWM IR @ VRWM

Breakdown Voltage

(Note 4)

VC, Clamping Voltage

(Note 5) Max

IPP

Capacitance

VBR @ 1 mA (Volts) @ 1 A @ 5 A @ VR = 0 V, 1 MHz (pF)

(V) (mA) Min Max (V) (V) (A) Typ Max

SL05 L05 5.0 20 6.0 8.0 9.8 11 17 3.5 5.0

SL12 L12 12 1.0 13.3 15.5 19 24 12 3.5 5.0

SL15 L15 15 1.0 16.7 18.5 24 30 10 3.5 5.0

SL24 L24 24 1.0 26.7 29 43 55 5.0 3.5 5.0

4. VBR measured at pulse test current of 1 mA at an ambient temperature of 25°C

5. Surge current waveform per Figure 2

TYPICAL CHARACTERISTICS

0.1 10

Figure 1. Maximum Peak Power Rating

PULSE WIDTH (ms)

100 1000

0.1

0.01

Figure 2. 8 × 20 ms Pulse Waveform

PPK, PEAK POWER (kW)

100

00204060

t, TIME (ms)

% OF PEAK PULSE CURRENT

PULSE WIDTH (tP) IS DEFINED

AS THAT POINT WHERE THE

PEAK CURRENT DECAY = 8 ms

PEAK VALUE IRSM @ 8 ms

HALF VALUE IRSM/2 @ 20 ms

Figure 3. Typical Junction Capacitance

−55 25 150

0.1

0.01

Figure 4. Typical Leakage Over Temperature

TEMPERATURE (°C)

@ 50% VRWM

3.5

1.5

0.5

C, CAPACITANCE (pF), 1 MHz FREQ.

2.5

@ ZERO BIAS @ VRWM

SL05

SL15

SL24

LEAKAGE (mA)

SL05T1

SL05T1 Series

http://onsemi.com

Applications Background

This new family of TVS devices (SL05T1 series) are

designed to protect sensitive electronics such as

communications systems, computers, and computer

peripherals against damage due to ESD conditions or

transient voltage conditions. Because of their low

capacitance value (less than 5 pF), they can be used in high

speed I/O data lines. Low capacitance is achieved by

integrating a compensating diode in series with the TVS

which is basically based in the below theoretical principle:

•Capacitance in parallel: CT = C1+C2+....+Cn

•Capacitance in series: 1/CT = (1/C1)+(1/C2)+....+(1/Cn)

The Figure 5 shows the integrated solution of the SL05T1

series device:

Figure 5.

COMPENSATING

DIODE

TVS

In the case that an over−voltage condition occurs in the I/O

line protected by the SL05T1 series device, the TVS is

reversed−biased while the compensation diode is

forward−biased so the resulting current due to the transient

voltage is drained to ground.

If protection in both polarities is required, an additional

device is connected in inverse−parallel with reference to the

first one, the Figure 6 illustrates the inverse−parallel

connection for bi−directional or unidirectional lines:

Figure 6.

An alternative solution to protect unidirectional lines, is to

connect a fast switching steering diode in parallel with the

SL05T1 series device. When the steering diode is

forward−biased, the TVS will avalanche and conduct in

reverse direction. It is important to note that by adding a

steering diode, the effective capacitance in the circuit will be

increased, therefore the impact of adding a steering diode

must be taken in consideration to establish whether the

incremental capacitance will affect the circuit functionality

or not. The Figure 7 shows the connection between the

steering diode and the SL05T1 series device:

Figure 7.

STEERING DIODE

SL05T1 DEVICE

Another typical application in which the SL05T1 series

device can be utilized, is to protect multiple I/O lines. The

protection in each of the I/O lines is achieved by connecting

two devices in inverse−parallel. The Figure 8 illustrates how

multiple I/O line protection is achieved:

Figure 8.

OUTPUTINPUT

For optimizing the protection, it is recommended to use ground planes and short path lengths to minimize the PCB’s ground inductance.

SL05T1 Series

http://onsemi.com

PACKAGE DIMENSIONS

SOT−23 (TO−236)

CASE 318−08

ISSUE AN

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. MAXIMUM LEAD THICKNESS INCLUDES LEAD

FINISH THICKNESS. MINIMUM LEAD

THICKNESS IS THE MINIMUM THICKNESS OF

BASE MATERIAL.

4. 318−01 THRU −07 AND −09 OBSOLETE, NEW

STANDARD 318−08.

ǒmm

inchesǓ

SCALE 10:1

0.8

0.031

0.9

0.035

0.95

0.037

0.95

0.037

2.0

0.079

SOLDERING FOOTPRINT*

VIEW C

0.25

SEE VIEW C

DIM

MIN NOM MAX MIN

MILLIMETERS

0.89 1.00 1.11 0.035

INCHES

A1 0.01 0.06 0.10 0.001

b0.37 0.44 0.50 0.015

c0.09 0.13 0.18 0.003

D2.80 2.90 3.04 0.110

E1.20 1.30 1.40 0.047

e1.78 1.90 2.04 0.070

L0.10 0.20 0.30 0.004

0.040 0.044

0.002 0.004

0.018 0.020

0.005 0.007

0.114 0.120

0.051 0.055

0.075 0.081

0.008 0.012

NOM MAX

STYLE 26:

PIN 1. CATHODE

2. ANODE

3. NO CONNECTION

2.10 2.40 2.64 0.083 0.094 0.104

0.35 0.54 0.69 0.014 0.021 0.029

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice

to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All

operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights

nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should

Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,

and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal

Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

Europe, Middle East and Africa Technical Support:

Phone: 421 33 790 2910

Japan Customer Focus Center

Phone: 81−3−5773−3850

SL05T1/D

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