SP3232EH View Datasheet(PDF) - Signal Processing Technologies

Part Name

Description

MFG CO.

SP3232EH

3.3V, 460 Kbps RS-232 Transceivers

Signal Processing Technologies 

For the Human Body Model, the current

limiting resistor (RS) and the source capacitor

(CS) are 1.5kΩ an 100pF, respectively. For

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

S

and the source capacitor (CS) are 330Ω an 150pF,

respectively.

The higher CSvalue and lower R Svalue in the

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 19. ESD Test Waveform for IEC1000-4-2

Device Pin

Tested

Human Body

Model

Driver Outputs

Receiver Inputs

±15kV

±15kV

Table 3. Transceiver ESD Tolerance Levels

IEC1000-4-2

Air Discharge Direct Contact

±15kV

±15kV

±8kV

±8kV

Level

4

4

Date: 1/18/06

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

14

© Copyright 2006 Sipex Corporation

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