Relative Susceptibility To Static Discharge Damage - Tektronix SG 505 Instruction Manual

Table 5-1 for relative susceptibility of various classes of
semiconductors. Static voltages of 1 kV to 30 kV are
common i n un protected environments.
Observe the following precautions t o avoid damage:
1.
Mini mize handling of static-sensitive components.
2. Transport and store static-sensitive components or
assemblies in their original containers, on a metal rail, or
on conductive foam. Label any package that contains
static-sensitive assem blies or components.
3,
Discharge the static voltage from your body by
wearing a wrist strap while handling these components.
Servicing static-sensitive assemblies or components
should be performed only a static-free work station by
qualified service personneL
4
Nothing capable of generating or holding a static
charge should be allowed on the work station surface.
5. Keep the component leads shorted together when­
ever possi ble.
6.
Pi C k up components by the body, never by the leads.
7 . 00
not slide the components over any surface.
8.
Avoid handling components in areas that have a
floor or work-surface covering capable of generat i n g a
static charge.
9. Use a soldering iron that is connected to earth
ground.
10.
Use only special antistatic suction type or wick
type desoldering tools.
Table 5-1
RELATIVE SUSCEPTIBILITY TO
STATIC DISCHARGE DAMAGE
Semiconductor Classes
M O S or C M O S m icrocircuits or
discretes, or linear microcircuits
with MOS i nputs.
(Most Sensitive)
Eel
Schottky signal diodes
Schottky TTL
High-frequency bipolar transistors
JFETs
Unear microcircuits
TTL
( least Sensitive)
.J Voltage equivalent for levels:
1 = 1 0 0 10 500 V 4 = 500 V
2 = 200 10 500 V 5 = 400 to 600 V
3 = 250 V
6 = 600 t0 800 V
(Voltage discharged from a 1 0 0 pF capacitor through a resistance
of 100 ohms.)
Maintenance-SG 505
:
Relative
I
Susceptibility
Levels'
i
2
3
4
5
6
7
7 = 40010 1000 V (est.)
8 = 900 V
9 = 1200 V
5-3