Datasheet SMS12TC, SMS12TG, SMS15TC, SMS15TG, SMS05TC Datasheet (Semtech Corporation)

PROTECTION PRODUCTS

SMS05 THRU SMS24

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 four 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 four 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) and Pagers
u Desktops PC and Servers
u Notebook, Laptop, and Palmtop Computers
u Portable Instrumentation
u Peripherals
u MP3 Players
u Cordless Phones

Circuit Diagram Schematic & PIN Configuration

SOT23-6L (Top View)

Revision 9/2000

1

www.semtech.com

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Absolute Maximum Rating

SMS05 THRU SMS24

gnitaRlobmySeulaVstinU

)sµ02/8=pt(rewoPesluPkaePP

erutarepmeTgniredloSdaeLT

erutarepmeTgnitarepOT

erutarepmeTegarotST

Electrical Characteristics

50SMS

retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU

egatloVffO-dnatSesreveRV

egatloVnwodkaerBesreveRV

tnerruCegakaeLesreveRI

egatloVgnipmalCV

kp

)sµ02/8=pt(tnerruCesluPkaePI

)2-4-00016CEIrepMBH(egatloVDSEV

MWR

I

RB

R

C

V

MWR

I

PP

Am1=6 V

t

C°52=T,V5=02Aµ

PP

PP

L

J

GTS

sµ02/8=pt,A5=8.9V

053sttaW

42A

52>Vk

).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=

21SMS

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.

www.semtech.com

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Electrical Characteristics (Continued)

51SMS

retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU

SMS05 THRU SMS24

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=

42SMS

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

www.semtech.com

SMS05 THRU SMS24

µ

µ

PROTECTION PRODUCTS

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 Duration - 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

F

(A)

Waveform

tr = 8µs

td = 20µs

Waveform

Parameters:

tr = 8µs

s

td = 20

Clamping Voltage vs. Peak Pulse Current

45
40

SMS24

35

(V)

C

30
25
20
15
10

Clamping Voltage - V

5
0

0 5 10 15 20 25 30

SMS15

SMS12

Peak Pulse Current - I

SMS05

(A)

PP

Waveform

Parameters:

td = 20

tr = 8µs

s

4ã 2000 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Applications Information

SMS05 THRU SMS24

Device Connection for Protection of Four Data Lines

The SMSxx is designed to protect up to four unidirec­tional data lines. The device is connected as follows:

1. Unidirectional protection of four I/O lines is
achieved by connecting pins 1, 3, 4 and 6 to the
data lines. Pin 2 and 5 are connected to ground.
The ground connections 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 SMSxx near the input terminals or con-

nectors to restrict transient coupling.

l Minimize the path length between the SMSxx 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.

SMSxx Circuit Diagram

Protection of Four Unidirectional Lines

ã 2000 Semtech Corp.

5

www.semtech.com

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Outline Drawing - SO-8

Outline Drawing - SOT23-6L

SMS05 THRU SMS24

Land Pattern - SOT23-6L

6ã 2000 Semtech Corp.

www.semtech.com

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Marking Codes

SMS05 THRU SMS24

rebmuNtraP

50SMS50/50

21SMS21/21

51SMS51/51

42SMS42/42

edoC

Ordering Information

rebmuNtraP

CT.50SMSV5000,3hcnI7

GT.50SMSV5000,01hcnI31

CT.21SMSV21000,3hcnI7

GT.21SMSV21000,01hcnI31

gnikraM

gnikroW

egatloV

repytQ

leeR

eziSleeR

CT.51SMSV51000,3hcnI7

GT.51SMSV51000,01hcnI31

CT.42SMSV42000,3hcnI7

GT.42SMSV42000,01hcnI31

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]

ã 2000 Semtech Corp.

7

www.semtech.com