SM712TC

更新时间： 2024-11-28 22:21:43

品牌	Logo	应用领域
商升特 - SEMTECH		二极管电视
页数	文件大小	规格书
6页	149K
描述
Asymmetrical TVS Diode for Extended Common-Mode RS-485

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SM712TC 数据手册

SM712

Asymmetrical TVS Diode for

Extended Common-Mode RS-485

PROTECTION PRODUCTS

Features

Description

The SM712 transient voltage suppressor (TVS) diode is

designed for asymmetrical (12V to -7V ) protection in

multi-point data transmission standard RS-485 applica-

tions. The SM712 may be used to protect devices

from transient voltages resulting from electrostatic

discharge (ESD), electrical fast transients (EFT), and

lightning.

u 400 watts peak pulse power (tp = 8/20µs)

u Transient protection for asymmetrical data lines to

IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)

IEC 61000-4-4 (EFT) 40A (t5/50ns)

IEC 61000-4-5 (Lightning) 12A (8/20µs)

u Protects two +12V to -7V lines

u Low capacitance

u Low clamping voltage

u Solid-state silicon avalanche technology

The SM712 features 400 Watts (tp = 8/20µs) of

power handling capability to accommodate the higher

transient voltage levels which may be expected in

extended common mode applications. This provides

higher equipment reliability and eliminates the guess

work required when using zener diodes that are not

rated to handle such transient conditions.

Mechanical Characteristics

u JEDEC SOT23 package

u Molding compound flammability rating: UL 94V-0

u Marking : 712

u Packaging : Tape and Reel per EIA 481

The SM712 replaces four discrete components by

integrating two 12V and two 7V TVS diodes in a single

package. The integrated design aids in reducing

voltage over-shoot associated with trace inductance.

The low clamping voltage of the SM712 minimizes the

stress on the protected transceiver. The SOT23

package allows flexibility in the design of crowded

circuit boards.

Applications

u Protection of RS-485 transceivers with extended

common-mode range

u Security systems

u Automatic Teller Machines

u HFC systems

u Networks

Circuit Diagram

Schematic & PIN Configuration

SOT23 (Top View)

www.semtech.com

Revision 9/2000

12 3 4 5 6

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