Editing CMOS (section)

=== Power supply pins ===
{{See also|IC power-supply pin}}
The power supply pins for CMOS are called V<sub>DD</sub> and V<sub>SS</sub>, or V<sub>CC</sub> and Ground(GND) depending on the manufacturer. V<sub>DD</sub> and V<sub>SS</sub> are carryovers from conventional MOS circuits and stand for the ''drain'' and ''source'' supplies.<ref>{{cite web |url=http://www.fairchildsemi.com/an/AN/AN-77.pdf |title=CMOS, the Ideal Logic Family |publisher=Fairchild Semiconductor |date=January 1983 |access-date=2011-11-25 |url-status=dead |archive-url=https://web.archive.org/web/20111209004748/http://www.fairchildsemi.com/an/AN/AN-77.pdf |archive-date=2011-12-09 }}</ref> These do not apply directly to CMOS, since both supplies are really source supplies. V<sub>CC</sub> and Ground are carryovers from [[TTL logic]] and that nomenclature has been retained with the introduction of the 54C/74C line of CMOS.