Instructions

1.9 Integrated circuits (ICs)
Finally, the integrated circuits are inserted in the openings provided with the correct
polarity.
Caution!
Integrated circuits are very sensitive to incorrect polarity! For this reason, pay
attention to the corresponding marking on the ICs (notch or point).
The component IC 2 is an especially sensitive CMOS-IC, which can be destroyed
through static charge.
MOS-components should thus be gripped only at the casing, without thereby
touching the contact pins.
Integrated circuits should not be changed or inserted in the socket if the operating
voltage has been applied.
IC1 = ICL 7107, marking (notch or point) must point to “R2”
IC2 = CD 4049, HCF 4049 or MC 14049, marking (notch or point) must point to “D2”.
07 A/D-converter 3½ digit