Tektronix ECO422D, Инструкция по эксплуатации

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Maintenance
ECO422D SD/HD Changeover Unit Instruction Manual
7- 3
CAUTION.
Static discharge can damage or degrade many semiconductor
components.
This instrument contains electrical components that are susceptible to damage or
degradation from static discharge. See Table 7--1 for relative susceptibility of
various classes of semiconductors. Higher static discharge voltages than the
levels listed in Table 7--1 can degrade the performance and reliability of the
semiconductor components. Static voltages of 1 kV to 30 kV are common in
unprotected environments.
Table 7- 1: Static-sensitive components
Semiconductor classes Relative susceptibility levels
MOS or CMOS microcircuits or discrete or linear
microcircuits with MOS inputs (most sensitive) 100 to 500 V
EL, 74F, 74ALS, and 155- P/N parts 200 to 500 V
Schottky Signal Diodes 250 V
Schottky TTL 500 V
High-frequency Bipolar Transistors and ICs 400 to 600 V
JFETs 600 to 800 V
Low-frequency Linear Microcircuits 400 to 1000 V
Low-power Schottky TTL 900 V
TTL (least sensitive) 1200 V
NOTE
. Static discharges of less than 2 kV are seldom felt.
Observe the following precautions to avoid damage:
1. Minimize handling of static-sensitive components.
2. Transport and store static-sensitive components or assemblies in their
original containers or on nonconductive surfaces.
3.
Discharge the static voltage from your body by wearing a grounded wrist
strap while handling these components. Service static-sensitive components
or assemblies only at a static free workstation by qualified personnel. If
soldering is involved, use a soldering iron connected to earth ground and
special antistatic desoldering tools.
Static-Sensitive
Components