SP1481E Datasheet, PDF (7/11 Pages) Sipex Corporation – ±15kV Enhanced Low Power Half-Duplex RS-485 Transceivers

to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
equipment that are accessible to personnel during
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 8. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
RR_CC
DC Power
Source
SSWW11
RR_SS
CC_SS
SSWW22
Device
Under
Test
Figure 7. ESD Test Circuit for Human Body Model
RR_CC
DC Power
Source
SSWW11
Contact-Discharge Module
RR_SS
R_V
SSWW22
Device
CC_SS
Under
Test
RS and RV add up to 330Ω for IEC1000-4-2.
Figure 8. ESD Test Circuit for IEC1000-4-2
Rev:B Date: 02/26/04
SP1481E Low Power Half-Duplex RS485 Transceivers
7
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