Datasheet SMDA05C-8 Datasheet (SEMTECH)

PROTECTION PRODUCTS

PROTECTION PRODUCTS

SMDA05C-8 through SMDA24C-8

Bidirectional TVS Array

for Protection of Eight Lines

Description

The SMDAxxC-8 series of transient voltage suppres­sors are designed to protect components which are
connected to data and transmission lines from voltage
surges caused by electrostatic discharge (ESD), electri­cal fast transients (EFT), and lightning.

TVS diodes are characterized by their high surge
capability, low operating and clamping voltages, and
fast response time. This makes them ideal for use as
board level protection of sensitive semiconductor
components. The SMDAxxC-8 is designed to provide
transient suppression on multiple data lines and I/O
ports. The low profile SO-14 design allows the user to
protect up to eight data and I/O lines with one pack­age. They are bidirectional device and may be used on
lines where the normal operating voltage is above and
below ground (i.e. -12V to +12V).

The SMDAxxC-8 TVS diode array will meet the surge
requirements of IEC 61000-4-2 (Formerly IEC 801-2),
Level 4, “Human Body Model” for air and contact
discharge.

Features

 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) 12A (8/20µs)

 Small SO-14 surface mount package
 Protects eight I/O lines
 Working voltages: 5V, 12V, 15V and 24V
 Low leakage current
 Low operating and clamping voltages
 Solid-state silicon avalanche technology

Mechanical Characteristics

 JEDEC SO-14 package
 Molding compound flammability rating: UL 94V-0
 Marking : Part Number, Logo, Date Code
 Packaging : Tape and Reel per EIA 481
 RoHS/WEEE Compliant

Applications

 RS-232 and RS-422 Data Lines
 Microprocessor Based Equipment
 LAN/WAN Equipment
 Set-Top Box
 Notebooks, Desktops, and Servers
 Portable Instrumentation
 Peripherals
 Serial and Parallel Ports

Circuit Diagram Schematic & PIN Configuration

1

1 & 14

2 3 12 13 5 6 9 10

Revision 04/12/05

7 & 8

2

3

4

5

6

78

SO-14 (Top View)

1

14

13

12

11

10

9

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PROTECTION PRODUCTS

PROTECTION PRODUCTS

Absolute Maximum Rating

SMDA05C-8 through SMDA24C-8

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p

)sµ02/8=P

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Electrical Characteristics

8-C50ADMS

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kp

L

J

GTS

MWR

I

RB

R

C

PP

V

MWR

I

PP

t

p

Am1=6 V

t

C°52=T,V5=02Aµ

t,A1=

p

sµ02/8=8.9V

sµ02/8=71A

003sttaW

).ces01(062C°

521+ot55-C°

051+ot55-C°

5V

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j

dnuorG

V

R

8-C21ADMS

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MWR

I

RB

R

C

PP

j

V

MWR

I

PP

t

p

Am1=3.31V

t

t,A1=

p

sµ02/8=21A

dnuorG

V

R

dnasniPO/IneewteB

053Fp

zHM1=f,V0=

21V

C°52=T,V21=1Aµ

sµ02/8=91V

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021Fp

zHM1=f,V0=

2 2005 Semtech Corp.

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PROTECTION PRODUCTS

Electrical Characteristics (Continued)

8-C51ADMS

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SMDA05C-8 through SMDA24C-8

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MWR

I

RB

R

C

PP

j

V

MWR

I

PP

t

p

Am1=7.61V

t

t,A1=

p

sµ02/8=01A

dnuorG

V

R

8-C42ADMS

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MWR

I

RB

R

C

V

MWR

I

PP

Am1=7.62V

t

t,A1=

p

51V

C°52=T,V51=1Aµ

sµ02/8=42V

dnasniPO/IneewteB

57Fp

zHM1=f,V0=

42V

C°52=T,V42=1Aµ

sµ02/8=34V

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ecnaticapaCnoitcnuJC

PP

j

t

p

sµ02/8=5A

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dnuorG

V

R

zHM1=f,V0=

3 2005 Semtech Corp.

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SMDA05C-8 through SMDA24C-8

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Typical Characteristics

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

10

(kW)

pk

1

0.1

Peak Pulse Power - P

0.01

0.1 1 10 100 1000

Pulse Duration - t

(µs)

p

Pulse Waveform

110

100

90

80

PP

70

60

50

40

Percent of I

30

20

10

0

0 5 10 15 20 25 30

-t

e

Time (µs)

td = IPP/2

Waveform

Parameters:

td = 20µs

tr = 8µs

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

A

(oC)

ESD Pulse Waveform (IEC 61000-4-2)

IEC 61000-4-2 Discharge Parameters

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15.748 2 2

25184 4 4

35.222166 8

403618 8 51

4 2005 Semtech Corp.

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PROTECTION PRODUCTS

SMDA05C-8 through SMDA24C-8

Device Connection for Protection of Eight Data Lines

The SMDAxxC-8 is designed to protect up to 8 data or
I/O lines. They are bidirectional devices and may be
used on lines where the signal polarities are above and
below ground.

The SMDAxxC-8 TVS arrays employ a monolithic struc­ture. Therefore, the working voltage (V
down voltage (V

) specifications apply to the differen-

BR

) and break-

RWM

tial voltage between any two data line pins. For ex­ample, the SMDA24C-8 is designed for a maximum
voltage excursion of ±12V between any two data lines.

The device is connected as follows:

z Pins 2, 3, 5, 6, 9, 10, 12 and 13 are connected to

the lines that are to be protected. Pins 1, 7, 8,
and 14 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. Pins 4 and 11 are
not connected.

Circuit Diagram

GND

I/O 1

I/O 2

N.C.

I/O 3

I/O 4

GND

Connection Diagram

GND

N.C.

I/O 5I/c2031 TD(N.C.)Tj0 -9.468 TD9 TD(N46/8 m443.7bD(N.C.)Tj0 -9.468 TD9 TD(Nj0 2.9861 TD(I/O 5)TjTuN.C048 61 TD(I/O 44.48 65j0 -2BT370 -6705)TjTj18.4626 8015)TjT.)Tj-2BT370 -7582

GND

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:

z Place the TVS near the input terminals or connec-

tors to restrict transient coupling.

z Minimize the path length between the TVS and the

protected line.

z Minimize all conductive loops including power and

ground loops.

z The ESD transient return path to ground should be

kept as short as possible.

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

5 2005 Semtech Corp.

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PROTECTION PRODUCTS

X

PROTECTION PRODUCTS

Outline Drawing - SO-14

SMDA05C-8 through SMDA24C-8

A

N

2X

E/2

12

ccc C

2X N/2 TIPS

aaa

C

SEATING

PLANE

NOTES:

C

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

1.

DATUMS AND TO BE DETERMINED AT DATUM PLANE

2. -A-

3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

OR GATE BURRS.

REFERENCE JEDEC STD MS-012, VARIATION AB.

4.

-B-

3

D

e

B

bxN

bbb C A-B D

D

E

E1

GAGE

PLANE

A

A2

A1

0.25

SIDE VIEW

-H-

DIMENSIONS

INCHES

DIM

SEE DETAIL

h

H

DETAIL A

h

L

(L1)

A

c

01

aaa

bbb

ccc

NOMMIN

A

A1

A2

b

c

D

E1

E

e

h

L

L1

N

01

-

.053

-

.004

-

.049

-

.012

-

.007

.337

.341

.150

.154

.236 BSC

.050 BSC

-

.010 .020 0.50

.028

.016

(.041)

14

-

0°

.004

.010

.008

MILLIMETERS

MAX MAXNOM

MIN

-

1.35

.069

.010

.065

.020 0.31

.010

.344

.157

.041

8° 0°

0.10

1.25

0.17

8.55

3.80

0.25

0.40

-

-

-

8.65

3.90

6.00 BSC

1.27 BSC

-

0.72-1.04

(1.04)

14

-

0.10

0.25

0.20

1.75

0.25

1.65

0.51

0.25

8.75

4.00

8°

Land Pattern - SO-14

(C)

P

NOTES:

1.

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

2.

REFERENCE IPC-SM-782A, RLP NO. 302A.

ZG

Y

DIM

C

G

P

X

Y

Z

DIMENSIONS

INCHES

(.205)

.118

.050

.024

.087

.291

MILLIMETERS

(5.20)

3.00

1.27

0.60

2.20

7.40

6 2005 Semtech Corp.

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PROTECTION PRODUCTS

Ordering Information

SMDA05C-8 through SMDA24C-8

rebmuNtraPhsiniFdaeL

BT.8-C50ADMSbPnS005hcnI7

BT.8-C21ADMSbPnS005hcnI7

BT.8-C51AMDSbPnS005hcnI7

BT.8-C42ADMSbPnS005hcnI7

TBT.8-C50ADMSeerFbP005hcni7

TBT.8-C21ADMSeerFbP005hcni7

TBT.8-C51AMDSeerFbP005hcni7

TBT.8-C42ADMSeerFbP005hcni7

8-C50ADMSbPnSebuT/65A/N

8-C21ADMSbPnSebuT/65A/N

8-C51AMDSbPnSebuT/65A/N

repytQ

leeR

leeR

eziS

8-C42ADMSbPnSebuT/65A/N

T.8-C50ADMSeerFbPebuT/65A/N

T.8-C21ADMSeerFbPebuT/65A/N

T.8-C51AMDSeerFbPebuT/65A/N

T.8-C42ADMSeerFbPebuT/65A/N

Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: [phone] FAX [phone]

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