MC14490FELG

Specialty Logic Overview

The MC14490FELG is a Hex Contact Bounce Eliminator constructed with complementary MOS enhancement mode devices. It eliminates extraneous level changes from mechanical contacts by generating a clean digital signal four clock periods after input stabilization. The device features an internal R-C oscillator requiring only one external capacitor, or accepts an external clock source. It includes diode protection on all inputs, internal pullups, and Schmitt trigger clock input. Supply voltage ranges from 3.0 V to 18 V. Package: SOEIAJ-16.

Specialty Logic Feature Summary

• Eliminates contact bounce on both make and break transitions using a single line input
• Integrates internal R-C oscillator or supports external clock sources for timing control
• Features TTL compatible data inputs and outputs with built-in input pullup resistors
• Includes diode protection on all inputs and Schmitt trigger shaping on the clock input

Specialty Logic Applications

• Digital integrator and system synchronizer applications
• Delay line generation for programming other timing operations
• Fast attack/slow release timer circuits requiring asymmetrical timing
• Single pulse output generation from push button or relay contacts

Specialty Logic Procurement Notes

Verify the specific ordering suffix 'FELG' corresponds to the SOEIAJ-16 tape and reel packaging configuration. Confirm that the component meets RoHS compliance standards as indicated by the 'G' suffix. Ensure the procurement channel provides valid traceability documentation for this specific package type and manufacturer designation.

Specialty Logic Selection Notes

Select this component when designing systems requiring reliable debouncing of mechanical switches without complex external circuitry. The internal oscillator simplifies design by minimizing external components to a single capacitor. Consider the supply voltage range and operating temperature requirements to ensure compatibility with the target application environment and logic levels.

Specialty Logic Part Context

This part belongs to the MC14490 series of hex contact bounce eliminators manufactured by onsemi. It is designed for use in digital logic systems where mechanical switch noise must be filtered out before processing. The device utilizes CMOS technology to provide low power consumption and high noise immunity while maintaining compatibility with standard TTL logic families.

Specialty Logic Replacement Considerations

MC14490DWG

Specialty Logic FAQ

How is the debounce delay time determined?

The delay is determined by the clock frequency, which can be set by an external capacitor connected to the internal R-C oscillator or by an external clock source applied to Pin 7.

Can the MC14490 handle both rising and falling edge bounces?

Yes, the circuit is designed to remove bounce on both the 'make' and 'break' of a contact closure using its digital integrator architecture.