Key facts
- Brand
- Fairchild
- Model
- MM74HC
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-08-01
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FAIRCHILD Interfacing to MM74HC High-Speed CMOS Logic handbook
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.
Read onlineFairchild MM74HC specifications
| Input high voltage (VIH) at VCC=5 V | 3.5 V |
|---|---|
| Input low voltage (VIL) at VCC=5 V | 1.0 V |
| Input high voltage (VIH) over supply range | 0.7 × VCC |
| Input low voltage (VIL) over supply range | 0.2 × VCC |
| Supply voltage range | 2 V – 6 V |
| Standard output current rating | ±25 mA per pin |
| Bus driver output current rating | ±35 mA per pin |
| Maximum VCC rating | 7 V |
Source: Fairchild MM74HC High-Speed CMOS Logic Application Note – DC Electrical Characteristics
All Fairchild MM74HC documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What supply voltage range is recommended for MM74HC devices?
MM74HC devices are specified to operate from 2 V to 6 V.
From: Fairchild MM74HC High-Speed CMOS Logic Application Note – DC Electrical Characteristics
What are the input high and low voltage thresholds at a 5 V supply?
At VCC = 5 V, the input high threshold (VIH) is 3.5 V and the input low threshold (VIL) is 1.0 V.
From: Fairchild MM74HC High-Speed CMOS Logic Application Note – DC Electrical Characteristics