Fairchild MM74HC Manuals

This document describes the methods and requirements for interfacing with MM74HC high-speed CMOS logic. The MM74HC series logic can be interfaced with other logic families, including 74LS TTL, MM74C, CD4000 CMOS, and 10000 ECL logic. Interfacing with TTL logic is very simple.

This document introduces the features and characteristics of the MM54HC/MM74HC family of high-speed logic components. This family of components offers a unique combination of speed and power characteristics that are not found in bipolar logic families or any other CMOS family. It has operating speeds similar to low power Schottky (54LS/74LS) technology, but is approximately half as fast as the 54ALS/74ALS and 54S/74S logic. Compared to CD4000 and 54C/74C, it provides an order of magnitude improvement in speed by utilizing an advanced 3.5 micron silicon gate-recessed oxide CMOS process. Additionally, the MM54HC/MM74HC family retains all the advantages of older metal gate CMOS and provides the functions and pin outs of the popular 54LS/74LS series logic components, as well as several special functions not previously implemented in CD4000 or 54LS/74LS.

MM74HC is a high-speed CMOS with high speed, low power consumption and strong anti-interference ability.

This application note discusses the input and output characteristics of the MM74HC high-speed CMOS logic family, as well as how these characteristics are affected by various parameters such as power supply voltage and temperature. Also, for those users who have been designing with metal-gate CMOS and TTL logic, this application note compares the notable differences and features of high-speed CMOS to those logic families.