Essential Logic Families
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Did you know that TTL chips do not output 5 volts? 74LS, 74HC, and 74HCT all have different input and output thresholds. Switching between logic families can be difficult if you are not careful. In this video, learn how different 7400-series logic families compare with input threshold, output voltage, frequency, rise time, and propagation delay.
Supplemental Content:
- The Learning Circuit 48: Intro to Integrated Circuits
- The Learning Circuit 50: How Logic Gates Work
- The Learning Circuit 51: Making Logic Gates From Discrete Components
- Are you still using 7400-Series Logic, if so, where?
- Texas Instruments Logic Guide App Note (external)
- Explore Digital Logic in the Digital Fever Competition: Contest Details
Bill of Material:
| Product Name | Manufacturer | Quantity | Buy KitBuy Kit |
|---|---|---|---|
| MC74HC1G04DTT1G - 1 Gate Inverter 74HC | ON Semi | 1 | Buy NowBuy Now |
| SN74HCT04NSN74HCT04N - Inverter 74HCT, DIP | Texas Instruments | 1 | Buy NowBuy Now |
| SN74LS04NSN74LS04N - Inverter 74LS, DIP | Texas Instruments | 1 | Buy NowBuy Now |
| SOT23-to-SIP Adapter | Captial Advanced | 1 | Buy NowBuy Now |
| LCQT-SOIC14LCQT-SOIC14 SOIC14 to DIP Adapter | ARIES | 1 | Buy NowBuy Now |