SP488E Datasheet, PDF (6/10 Pages) Sipex Corporation – Enhanced Quad RS-485/RS-422 Line Receivers

RR_CC
DC Power
Source
SSWW11
RR_SS
CC_SS
SSWW22
Device
Under
Test
Figure 5. ESD Test Circuit for Human Body Model
R_CC
DC Power
Source
SSWW11
Contact-Discharge Module
RR_SS
R_V
SSWW22
CC_SS
Device
Under
Test
RS and RV add up to 330Ω for IEC1000-4-2.
Figure 6. ESD Test Circuit for IEC1000-4-2
ESD TOLERANCE
The SP488E and SP489E devices incorporate
ruggedized ESD cells on all driver output and
receiver input pins. The ESD structure is
improved over our previous family for more
rugged applications and environments sensitive
to electro-static discharges and associated
transients. The improved ESD tolerance is at
least +15kV without damage nor latch-up.
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
The Human Body Model has been the generally
accepted ESD testing method for semiconductors.
This method is also specified in MIL-STD-883,
Method 3015.7 for ESD testing. The premise of
this ESD test is to simulate the human body’s
potential to store electro-static energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model as
shown in Figure 5. This method will test the IC’s
capability to withstand an ESD transient during
normal handling such as in manufacturing areas
where the ICs tend to be handled frequently.
The IEC-1000-4-2, formerly IEC801-2, is
generally used for testing ESD on equipment and
systems. For system manufacturers, they must
guarantee a certain amount of ESD protection
since the system itself is exposed to the outside
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
6
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