Keithley 1793 Instruction Manual page 18

MAINTENANCE
MODEL 1793/6423
5-9. SPECIAL HANDLING OF STATIC SENSITIVE DEVICES.
5-10. CMOS and MOS devices are designed to function
at very high impedance levels for low power consump
tion. For this reason, a normal static charge build
up on your person or clothing can be sufficient to
destroy these devices. The following steps list the
static sensitive devices in your Model 1793/6423 and
provide instructions on how to avoid damaging them
when they must be removed/replaced.
a. Static sensitive devices;
Keith ley
Reference
Part No.
Designation
IC-I30
U501
IC-106
U502
IC-I45
U503
IC-153
U507
LSI-8
U509
LSI-I8
U511
b. The above integrated circuits should be
handled and transported only in protective con-
tainers. Typically they will be received in metal
tubes or static protective foam. Keep the devices
in their original containers until ready for use.
c. Remove the devices from their protective con
tainers only at a properly grounded work bench or
table, and only after grounding yourself by using a
wrist strap.
d. Handle the devices only by the body,
touch the pins.
NOTE
Do not
P1008 is shipped with a piece of con
ductive foam covering the pins to prevent
static damage. This conductive foam
should be replaced if you disconnect P1008
to remove the 1793/6423 from its host
i nstrument.
e. Any printed circuit board into which a device
is to be inserted must also be grounded to the bench
or table.
f. Use only anti-static type solder suckers.
g. Use only grounded tip soldering irons.
h. After soldering the device into the board, or
properly inserting it into the mating receptacle,
the device is adequately protected and normal
handling can be resumed.
5-2