Datasheet SMS12CTC, SMS12CTG, SMS15CTC, SMS15CTG, SMS05CTC Datasheet (Semtech Corporation)

PROTECTION PRODUCTS

SMS05C THRU SMS24C

TVS Diode Array

For ESD and Latch-Up Protection

Description

The SMS series of TVS arrays are designed to protect
sensitive electronics from damage or latch-up due to
ESD and other voltage-induced transient events. Each
device will protect up to five lines. They are available
with operating voltages of 5V, 12V, 15V and 24V. They
are unidirectional devices and may be used on lines
where the signal polarities are above ground.

TVS diodes are solid-state devices designed specifically
for transient suppression. They feature large cross­sectional area junctions for conducting high transient
currents. They offer desirable characteristics for board
level protection including fast response time, low
operating and clamping voltage and no device degrada­tion.

The SMS series devices may be used to meet the
immunity requirements of IEC 61000-4-2, level 4. The
low cost SOT23-6L package makes them ideal for use
in portable electronics such as cell phones, PDAs, and
notebook computers.

Features

u Transient protection for data lines to

IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 24A (8/20µs)

u Small package for use in portable electronics
u Protects five I/O lines
u Working voltages: 5V, 12V, 15V and 24V
u Low leakage current
u Low operating and clamping voltages
u Solid-state silicon avalanche technology

Mechanical Characteristics

u EIAJ SOT23-6L package
u Molding compound flammability rating: UL 94V-0
u Marking : Marking Code
u Packaging : Tape and Reel per EIA 481

Applications

u Cell phone Handsets and Accessories
u Microprocessor Based Equipment
u Personal Digital Assistants (PDAs)
u Notebooks, Desktops, and Servers
u Portable Instrumentation
u Set Top Box
u Peripherals
u MP3 Players
u Cordless Phones

Circuit Diagram Schematic & PIN Configuration

SOT23-6L (Top View)

Revision 9/2000

1

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PROTECTION PRODUCTS

Absolute Maximum Rating

SMS05C THRU SMS24C

gnitaRlobmySeulaVstinU

)sµ02/8=pt(rewoPesluPkaePP

erutarepmeTgniredloSdaeLT

erutarepmeTgnitarepOT

erutarepmeTegarotST

Electrical Characteristics

C50SMS

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tnerruCegakaeLesreveRI

egatloVgnipmalCV

kp

)sµ02/8=pt(tnerruCesluPkaePI

)sµ02/8=pt,A1=FI(egatloVdrawroFkaePV

MWR

I

RB

R

C

V

MWR

I

PP

Am1=6 V

t

C°52=T,V5=02Aµ

PP

PF

L

J

GTS

sµ02/8=pt,A5=8.9V

003sttaW

42A

5.1V

).ces01(062C°

521+ot55-C°

051+ot55-C°

5V

egatloVgnipmalCV

ecnaticapaCnoitcnuJC

C

j

I

PP

sµ02/8=pt,A42=5.41V

dnasniPO/IneewteB

523004Fp

dnG

V

R

zHM1=f,V0=

C21SMS

retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU

egatloVffO-dnatSesreveRV

egatloVnwodkaerBesreveRV

tnerruCegakaeLesreveRI

egatloVgnipmalCV

egatloVgnipmalCV

ecnaticapaCnoitcnuJC

MWR

I

RB

R

C

C

j

V

MWR

I

PP

I

PP

Am1=3.31V

t

C°52=T,V21=1Aµ

sµ02/8=pt,A5=91V

sµ02/8=pt,A51=32V

dnasniPO/IneewteB

531051Fp

21V

dnG

V

R

zHM1=f,V0=

2ã 2000 Semtech Corp.

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PROTECTION PRODUCTS

Electrical Characteristics (Continued)

C51SMS

retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU

SMS05C THRU SMS24C

egatloVffO-dnatSesreveRV

egatloVnwodkaerBesreveRV

tnerruCegakaeLesreveRI

egatloVgnipmalCV

egatloVgnipmalCV

ecnaticapaCnoitcnuJC

MWR

I

RB

R

C

C

j

V

MWR

I

PP

I

PP

Am1=7.61V

t

C°52=T,V51=1Aµ

sµ02/8=pt,A5=42V

sµ02/8=pt,A21=92V

dnasniPO/IneewteB

001521Fp

51V

dnG

V

R

zHM1=f,V0=

C42SMS

retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU

egatloVffO-dnatSesreveRV

egatloVnwodkaerBesreveRV

tnerruCegakaeLesreveRI

egatloVgnipmalCV

MWR

I

RB

R

C

V

MWR

I

PP

Am1=7.62V

t

C°52=T,V42=1Aµ

sµ02/8=pt,A5=04V

42V

egatloVgnipmalCV

ã 2000 Semtech Corp.

C

ecnaticapaCnoitcnuJC

j

I

PP

sµ02/8=pt,A8=44V

dnasniPO/IneewteB

dnG

V

R

zHM1=f,V0=

3

0657Fp

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SMS05C THRU SMS24C

µ

µ

PROTECTION PRODUCTS

Typical Characteristics

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

10

(kW)

PP

1

0.1

Peak Pulse Power - P

0.01

0.1 1 10 100 1000

Pulse Durat io n - tp (µs)

110
100

90

PP

80
70
60
50
40
30

% of Rated Power or I

20
10

0

0 25 50 75 100 125 150

Ambient Temperature - T

(oC)

A

Pulse Waveform

110
100

90
80
70

PP

60
50
40

Percent of I

30
20
10

0

0 5 10 15 20 25 30

-t

e

Time (µs)

td = IPP/2

Parameters:

Forward Voltage vs. Forward Current

5

4.5
4

(V)

F

3.5
3

2.5
2

1.5

Forward Voltage - V

1

0.5
0

0 5 10 15 20 25 30 35 40 45

Forward Current - I

(A)

F

Waveform

tr = 8µs

td = 20µs

Waveform

Parameters:

tr = 8µs

s

td = 20

Clamping Voltage vs. Peak Pulse Current

45
40

SMS24C

35

(V)

C

30
25
20
15
10

Clamping Voltage - V

5
0

0 5 10 15 20 25 30

SMS15C

SMS12C

Peak Pulse Current - I

SMS05C

(A)

PP

Waveform

Parameters:

tr = 8µs

td = 20

s

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PROTECTION PRODUCTS

Applications Information

SMS05C THRU SMS24C

Device Connection for Protection of Five Data Lines

The SMSxxC is designed to protect up to five unidirec­tional data lines. The device is connected as follows:

1. Unidirectional protection of five I/O lines is
achieved by connecting pins 1, 3, 4, 5 and 6 to the
data lines. Pin 2 is connected to ground. The
ground connection should be made directly to the
ground plane for best results. The path length is
kept as short as possible to reduce the effects of
parasitic inductance in the board traces.

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:

l Place the SMSxxC near the input terminals or

connectors to restrict transient coupling.

l Minimize the path length between the SMSxxC and

the protected line.

l Minimize all conductive loops including power and

ground loops.

l The ESD transient return path to ground should be

kept as short as possible.

l Never run critical signals near board edges.
l Use ground planes whenever possible.

SMSxxC Circuit Diagram

Protection of Five Unidirectional Lines

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Outline Drawing - SO-8

Outline Drawing - SOT23-6L

SMS05C THRU SMS24C

Land Pattern - SOT23-6L

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Marking Codes

SMS05C THRU SMS24C

rebmuNtraP

C50SMS50C

C21SMS21C

C51SMS51C

C42SMS42C

edoC

Note:
Pin 1 Identified with a dot.

Ordering Information

rebmuNtraP

CT.C50SMSV5000,3hcnI7

GT.C50SMSV5000,01hcnI31

CT.C21SMSV21000,3hcnI7

gnikraM

gnikroW

egatloV

repytQ

leeR

eziSleeR

GTC21SMSV21000,01hcnI31

CT.C51SMSV51000,3hcnI7

GT.C51SMSV51000,01hcnI31

CT.C42SMSV42000,3hcnI7

GT.C42SMSV42000,01hcnI31

Note:
(1) No suffix indicates tube pack.

Contact Information

Semtech Corporation

Protection Products Division

652 Mitchell Rd., Newbury Park, CA 91320

Phone: [phone] FAX [phone]

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