Table of Contents
Advertisement
Models: XL260, XL261, XL262, XL264, XL265, XL266, XL274, XL275, XL360, XL361,
XL362, XL363, XL364, XL365, XL366, XL367, XL368, XL369, XL370, XL371, XL372, XL373,
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor can destroy
static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but
damage occurs. An electronic device exposed to electrostatic discharge (ESD) may work
perfectly throughout a normal cycle and may not seem to be affected at all. However,
although it may function normally for a while, it may be degraded in the internal layers,
reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases,
the discharge contains enough power to alter device parameters or melt silicon junctions.
Generating Static
The table below shows activities that generate static electricity and the associated
electrostatic voltage level.
Activity
Walking across carpet
Walking across vinyl floor
Motions of bench worker
Removing DIPS from plastic tubes
Removing DIPS from vinyl trays
Removing DIPS from styrofoam
Removing bubble pack from PCBs
Packing PCBs in foam-lined box
Note: 700 Volts can degrade a product.
Presario 1700 Series
XL374, XL375, XL376, XL377, and XL378
Typical Electrostatic Voltages
Relative Humidity
10%
40%
35,000 V
15,000 V
12,000 V
5,000 V
6,000 V
800 V
2,000 V
700 V
11,500 V
4,000 V
14,500 V
5,000 V
26,000 V
20,000 V
21,000 V
11,000 V
55%
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V
Advertisement
Table of Contents
Troubleshooting
