This document introduces the characteristics of the CMOS Schmitt trigger, including high input impedance, balanced input and output characteristics, wide power range, low power consumption, and high noise immunity.
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.
| 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 |
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.
At a supply voltage of 10V, there is typically 3.6V of threshold difference.
The CMOS Schmitt trigger comes six to a package.