SMDA24 [SEMTECH]

Unidirectional TVS Array for Protection of Four Lines; 单向TVS阵列的保护四行


型号：	SMDA24
厂家：	SEMTECH CORPORATION
描述：	Unidirectional TVS Array for Protection of Four Lines 单向TVS阵列的保护四行瞬态抑制器二极管电视光电二极管局域网
文件：	总7页 (文件大小：168K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SMDA05 THRU SMDA24

Unidirectional TVS Array

for Protection of Four Lines

PROTECTION PRODUCTS

Features

Description

The SMDAxx series of TVS arrays are designed to provide

undirectional protection for sensitive electronics from

damage or latch-up due to ESD, lightning and other

voltage-induced transient events. Each device will

protect four data or I/O lines. They are available with

operating voltages of 5V, 12V, 15V and 24V.

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) 12A (8/20µs)

u Undirectional protection

u Small SO-8 package

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

TVS diodes are solid-state devices designed specifically

for transient suppression. They offer desirable charac-

teristics for board level protection including fast re-

sponse time, low operating and clamping voltage and no

device degradation. The low profile SO-8 package allows

the user to protect up to four independent lines with one

package. The SMDAxx series is suitable protection for

sensitive semiconductors components such as micropro-

cessors, ASICs, transceivers, transducers, and CMOS

memory.

Mechanical Characteristics

u JEDEC SO-8 package

u Molding compound flammability rating: UL 94V-0

u Marking : Part number, date code, logo

u Packaging : Tube or Tape and Reel per EIA 481

The SMDAxx series devices may be used to meet the

ESD immunity requirements of IEC 61000-4-2, level 4 for

air and contact discharge.

Applications

u RS-232 data lines

u Microprocessor based equipment

u Notebooks, Desktops, & Servers

u Instrumentation

u LAN/WAN equipment

u Peripherals

u Serial and Parallel Ports

Schematic & PIN Configuration

SO-8 (Top View)

www.semtech.com

Revision 9/2000

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Absolute Maximum Rating

Rating

Peak Pulse Power (tp = 8/20µs)

ESD Voltage (HBM per (IEC 61000-4-2)

Lead Soldering Temperature

Operating Temperature

Symbol

Value

300

Units

Watts

P_pk

>25

T_L

T_J

260 (10 sec.)

-55 to +125

-55 to +150

°C

Storage Temperature

T_STG

°C

Electrical Characteristics

SMDA05

Parameter

Reverse Stand-Off Voltage

Reverse Breakdown Voltage

Reverse Leakage Current

Clamping Voltage

Symbol

Conditions

Minimum

Typical

Maximum

Units

V_RWM

V_BR

I_R

I_t= 1mA

V_RWM= 5V, T=25°C

I_PP= 1A, tp = 8/20µs

I_PP= 5A, tp = 8/20µs

tp = 8/20µs

9.8

µA

V_C

Clamping Voltage

V_C

Maximum Peak Pulse Current

Junction Capacitance

I_PP

C_j

V_R= 0V, f = 1MHz

400

SMDA12

Parameter

Symbol

V_RWM

V_BR

I_R

Conditions

Minimum

Typical

Maximum

Units

Reverse Stand-Off Voltage

Reverse Breakdown Voltage

Reverse Leakage Current

Clamping Voltage

I_t= 1mA

13.3

V_RWM= 12V, T=25°C

I_PP= 1A, tp = 8/20µs

I_PP= 5A, tp = 8/20µs

tp = 8/20µs

µA

V_C

Clamping Voltage

V_C

Maximum Peak Pulse Current

Junction Capacitance

I_PP

150

C_j

V_R= 0V, f = 1MHz

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ã 2000 Semtech Corp.

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Electrical Characteristics (Continued)

SMDA15

Parameter

Reverse Stand-Off Voltage

Reverse Breakdown Voltage

Reverse Leakage Current

Clamping Voltage

Symbol

V_RWM

V_BR

I_R

Conditions

Minimum

Typical

Maximum

Units

I_t= 1mA

16.7

V_RWM= 15V, T=25°C

I_PP= 1A, tp = 8/20µs

I_PP= 5A, tp = 8/20µs

tp = 8/20µs

µA

V_C

Clamping Voltage

V_C

Maximum Peak Pulse Current

Junction Capacitance

I_PP

C_j

V_R= 0V, f = 1MHz

100

SMDA24

Parameter

Symbol

V_RWM

V_BR

I_R

Conditions

Minimum

Typical

Maximum

Units

Reverse Stand-Off Voltage

Reverse Breakdown Voltage

Reverse Leakage Current

Clamping Voltage

I_t= 1mA

26.7

V_RWM= 24V, T=25°C

I_PP= 1A, tp = 8/20µs

I_PP= 5A, tp = 8/20µs

tp = 8/20µs

µA

V_C

Clamping Voltage

V_C

Maximum Peak Pulse Current

Junction Capacitance

I_PP

C_j

V_R= 0V, f = 1MHz

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ã 2000 Semtech Corp.

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Typical Characteristics

Non-Repetitive Peak Pulse Power vs. Pulse Time

Power Derating Curve

110

100

0.1

0.01

100

125

150

0.1

100

1000

Ambient Temperature - T_A(^oC)

Pulse Duration - tp (µs)

Pulse Waveform

110

100

Waveform

Parameters:

tr = 8µs

td = 20µs

e^-t

td = I_PP/2

Time (µs)

ESD Pulse Waveform (IEC 61000-4-2)

IEC 61000-4-2 Discharge Parameters

Level

First

Peak

Test

Peak

Current

Voltage

(Contact

Voltage

(Air

Current at 30 ns at 60 ns

Discharge) Discharge)

(A)

7.5

(A)

(kV)

22.5

www.semtech.com

ã 2000 Semtech Corp.

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Applications Information

Device Connection for Protection of Four Data Lines

Circuit Diagram

The SMDAxx series devices are designed to protect up to

four data lines. The devices are connected as follows:

The SMDAxx are unidirectional devices and are

designed for use on lines where the normal operat-

ing voltage is above ground. Pins 1, 2, 3, and 4 are

connected to the protected lines. Pins 5, 6, 7, and 8

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 Suppres-

sion of ESD.

I/O Line Protection

Good circuit board layout is critical for the suppression of

ESD induced transients. The following guidelines are

recommended:

Place the TVS near the input terminals or connectors

to restrict transient coupling.

Minimize the path length between the TVS and the

protected line.

Minimize all conductive loops including power and

ground loops.

The ESD transient return path to ground should be

kept as short as possible.

Never run critical signals near board edges.

Use ground planes whenever possible.

Typical Connection

To Protected

Device

Ground

From Connector

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ã 2000 Semtech Corp.

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Outline Drawing - SO-8

Land Pattern - SO-8

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ã 2000 Semtech Corp.

SMDA05 THRU SMDA24

PROTECTION PRODUCTS

Ordering Information

Working

Voltage

Qty per

Part Number

Reel Size

Reel

500

SMDA05.TB

SMDA12.TB

SMDA15.TB

SMDA24.TB

7 Inch

12V

15V

24V

Note:

(1) No suffix indicates tube pack.

(2) Consult factory for availability of 13 Inch reels.

Contact Information

Semtech Corporation

Protection Products Division

652 Mitchell Rd., Newbury Park, CA 91320

Phone: (805)498-2111 FAX (805)498-3804

www.semtech.com

ã 2000 Semtech Corp.

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