Table 7- 1: Static-Sensitive Components - Tektronix ECO422D Instruction Manual

Static-Sensitive
Components
ECO422D SD/HD Changeover Unit Instruction Manual
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
MOS or CMOS microcircuits or discrete or linear
microcircuits with MOS inputs (most sensitive)
EL, 74F, 74ALS, and 155- P/N parts
Schottky Signal Diodes
Schottky TTL
High-frequency Bipolar Transistors and ICs
JFETs
Low-frequency Linear Microcircuits
Low-power Schottky TTL
TTL (least sensitive)
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.
Maintenance
Relative susceptibility levels
100 to 500 V
200 to 500 V
250 V
500 V
400 to 600 V
600 to 800 V
400 to 1000 V
900 V
1200 V
7- 3