CMOS And TTL: A Level Shifting Cautionary Tale Comparison ... There are many choices available to you including a whole host of dedicated level shifter devices such as these ones from TI, but ...

A pull-up resistor is required to achieve a true high state in level translation, and is used to translate transistor-transistor logic (TTL) to CMOS logic. LLT performance can be described by a number ...

The first commercially produced TTL micrologic chips were Sylvania’s Universal High-Logic Level (SUHL ... not just the still common 4000-series CMOS logic chips (introduced by RCA in 1968 ...