Quincy Center for
Technical Education

Logic Families



TechnologyNameNotation
BiPolarStandard TTL*
Schottky S
Low Power Schottky LS
Advanced Schottky AS
Advanced Low Power Schottky ALS
FAST F
...
CMOSHigh Power HC
Advanced CMOS AC
Advanced High Power CMOS AHC
High Power w/TTL* HCT
Advanced CMOS w/TTL* ACT
Advanced High Power CMOS w/TTL* AHCT

*TTL is defined as Transistor-Transistor- Logic