SP3222EB Ver la hoja de datos (PDF) - Signal Processing Technologies

Número de pieza

componentes Descripción

Fabricante

SP3222EB

True +3.0V to +5.5V RS-232 Transceivers

Signal Processing Technologies 

For the Human Body Model, the current

limiting resistor (RS) and the source capacitor

(C )

S

are

1.5kΩ

an

100pF,

respectively.

For

IEC-1000-4-2, the current limiting resistor (RS)

and the source capacitor (CS) are 330Ω an

150pF, respectively.

The higher C value and lower R value in the

S

S

IEC1000-4-2 model are more stringent than the

Human Body Model. The larger storage capacitor

injects a higher voltage to the test point when SW2

is switched on. The lower current limiting resistor

increases the current charge onto the test point.

30A

15A

0A

t=0ns

t➙

t=30ns

Figure 20. ESD Test Waveform for IEC1000-4-2

Device Pin

Tested

Driver Outputs

Receiver Inputs

Human Body

Model

±15kV

±15kV

Table 3. Transceiver ESD Tolerance Levels

IEC1000-4-2

Air Discharge Direct Contact

±15kV

±15kV

±8kV

±8kV

Level

4

4

Rev. A Date:12/11/03

SP3222EB/3232EB True +3.0 to +5.5V RS-232 Transceivers

14

© Copyright 2003 Sipex Corporation

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