Logic IC Distributor Guide: Sourcing 74HC
Frequently Asked Questions
What is the difference between 74HC, 74LVC and CD4000 logic ICs?
74HC is high-speed CMOS running typically at 2 to 6 volts, 74LVC is low-voltage CMOS suited to 1.65 to 3.6 volt systems, and CD4000 is an older CMOS family with a wide 3 to 15 volt range but slower speeds.
How can I avoid counterfeit logic ICs when sourcing from a distributor?
Buy from authorized or franchised distributors, check lot codes and packaging against manufacturer records, request certificates of conformity, and test samples electrically before committing to volume orders.
Why should I check part lifecycle status before ordering logic ICs?
Some older families like CD4000 may be nearing end-of-life or made by fewer suppliers. Confirming active production status prevents redesigns, stock shortages, and dependence on risky grey-market sources.