WEITRON

http://www.weitron.com.tw

3/3

ESD9DXXC Series

Rev.A 11-Aug-09

Application Note

Electrostatic discharge (ESD) is a major cause of failure in electronic systems. Transient Voltage Suppressors (TVS)

are an ideal choice for ESD protection. They are capable of clamping the incoming transient to a low enough level such

that damage to the protected semiconductor is prevented. Surface mount TVS offers the best choice for minimal lead

inductance. They serve as parallel protection elements, connected between the signal lines to ground. As the transient

rises above the operating voltage of the device, the TVS becomes a low impedance path diverting the transient current

to ground. The ESD9DXXC Series is the ideal board evel protection of ESD sensitive semiconductor components.

The tiny SOD-923 package allows design flexibility in the design of high density boards where the

space saving is at a premium. This enables to shorten the routing and contributes to hardening against ESD.

Symbol

Parameter

Maximum Reverse Peak Pulse Current

Working Peak Reverse Voltage

Test Current

B1−Directional TVS

V

I

Fig1. Pulse Waveform

Fig2.Power Derating Curve

t, TIME (µs)

tf

Peak Value Ipp

td = t Ipp/2

e -t

120

100

80

60

40

20

0

220

200

180

160

140

120

100

80

60

40

20

0

0

5

10

15

20

25

30

0

25

50

75

100

125

150

Test

Waveform

Parameters

tf = 8µs

td = 20µs

Average Power

Peak Pluse Power 8/20µs