While this may be true in general, the legacy of TTL logic levels lives on in the form of TTL compatible families, usually denoted by a “T” in the family name. The voltage levels of CMOS ...

CMOS And TTL: A Level Shifting Cautionary Tale Comparison of TTL and CMOS logic thresholds with comparison to 3.3V output. NXP application note 240 (PDF). When directly driving logic you’d ...

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 ...

One advantage of TTL Monostable Multivibrators is their compatibility with TTL logic levels, which makes them easy to integrate into existing TTL-based systems. They also offer relatively fast ...