Key facts
- Brand
- Fairchild
- Model
- MM74C14
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Fairchild Semiconductor MM54C14/MM74C14 CMOS Schmitt Trigger Application Note
The document introduces the CMOS Schmitt trigger as a versatile design component, highlighting its advantages over TTL Schmitt triggers such as high impedance input, balanced characteristics, and a wide supply range. It explains the internal circuitry involving stacked P-channel and N-channel devices that create hysteresis through positive feedback.
The note details specific applications including signal conditioning for noisy signals, sine-to-square wave conversion, frequency-to-voltage conversion, and low-power oscillator design. It provides circuit diagrams and analysis for these applications, demonstrating how the component simplifies design and improves performance in various electronic circuits.
Fairchild MM74C14 specifications
| Input Impedance | 10^10 typical |
|---|---|
| Supply Range | 3V—15V |
| Noise Immunity | 0.70 Veg typical |
| Output Current | 360 uA |
| Operating Temperature (MM54C14) | -55°C to +125°C |
Source: Fairchild Semiconductor MM54C14/MM74C14 CMOS Schmitt Trigger Application Note
All Fairchild MM74C14 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What are the advantages of the CMOS Schmitt trigger over TTL?
The CMOS Schmitt trigger offers high impedance input, balanced input and output characteristics, a wide supply range from 3V to 15V, and low power consumption.
From: Fairchild Semiconductor MM54C14/MM74C14 CMOS Schmitt Trigger Application Note
What is the typical hysteresis voltage at 10V supply?
At a supply voltage of 10V, there is typically 3.6V of threshold difference.
From: Fairchild Semiconductor MM54C14/MM74C14 CMOS Schmitt Trigger Application Note
What is the supply voltage range for the MM74C14?
The device supports a wide supply voltage range from 3.0V to 15V.
Is the MM74C14 TTL compatible?
Yes, the datasheet lists TTL compatibility as a positive feature.