Hackaday

TTL And CMOS Logic ICs: The Building Blocks Of A Revolution

When starting a new electronics project today, one of the first things that we tend to do is pick the integrated circuits that make up the core of the design. This can be anything from a ...
EDN

How to Read Data Sheets: Logic ICs (Part 6)

The 74HC00 data sheet warns that inputs must not be allowed to float because this makes the output indeterminate. Now, that in itself is a good reason, but there is more… In my previous column, we ...
Hackaday

The Headache Of Fake 74LS Logic Chips

When you go on your favorite cheap online shopping platform and order a batch of 74LS logic ICs, what do you get? Most likely relabeled 74HC ICs, if the results of an AliExpress order by [More Fun ...
Electronic Design

CMOS/TTL Clock Oscillators Target Gigabit Ethernet Apps

Suited for Gigabit Ethernet, DSP, Stratum IV, and other CMOS/TTL applications, the M7R and M8R series 5V and 3.3V oscillators are available in frequencies between 80.000 MHz and 125.000 MHz. The ...
EDN

How to Read Data Sheets: Logic ICs (Part 7)

It turns out that if you run standard CMOS at 3.3 V, the logic levels are the same as TTL running at 5 V. In my previous column, we took a look at the 74HCT series of CMOS parts with TTL-compatible ...