SZMD03C datasheet(2/2 Pages) SECOS

2 / 2 page

Elektronische Bauelemente

SZMD03C

24W, 3 V

Transient Voltage Suppressors

for ESD Protection (Uni-directional)

01-June-2002 Rev. A

Page 2 of 2

http://www.SeCoSGmbH.com/

Any changes of specification will not be informed individually.

RATINGS AND CHARACTERISTICS CURVES

Applications Information

Device Connection Options

The SZMD series is designed to protect one

bi-directional or two uni-directional data or l/O lines

operating at 3 volts.Connection options are as

follows:

‧Bidirectional:Pin 1 is connected to the data line and

pin 2 is connected to ground (Since the device lls

symmetrical,these conmtions may be re- Ver3ed).For

best results,the ground connection should be made

directly to a ground plane on the board.The path

length should be kept as short as possible to minimize

parasitic inductance-Pin 3 is not

connected. ‧Unidirectional:Data lines are connected

to pin1 and pin2.Pin 3 is connected to ground.For

best results,this pin should be connected directly to a

ground plane on the board.The path lengh should be

kept as short as possible to minimize parasitic

inductance.

Circuit Board Layout Recommendations

for suppres- sion of ESD. Good circuit board layout is

critical for the suppression of fast rise-time transients

such as ESD.The following guidelines are

recommended (Refer to application note Sl99.01 for

more detailed information): ‧Place the TVS near the

input terminals or connec- tors 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 toground should be kept as short

as possible. ‧Never run critical signals near board

edges

‧Use ground planes whenever possib|e.

100

110

Time (us)

-t

td = IPP /2

Wave form

Paramete rs:

tr = 8 s

td = 20 s

Pulse Waveform

100

110

100

125

150

Ambient Temperature - TA (oC)

Power Derating Curve

Clamping Voltage vs. Peak Pulse Current

Peak Pulse Current - IPP (A)

Waveform

Parameters

tr = 8µs

td = 20µ

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