MC14490FEL

Specialty Logic Overview

The MC14490FEL 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 circuit debounces both make and break events using a single-line input. Operation relies on an internal R-C oscillator adjustable via an external capacitor or an external clock source. The device features TTL-compatible inputs and outputs, diode protection, and internal pullups.

Specialty Logic Feature Summary

• Eliminates contact bounce on both make and break transitions
• Includes internal R-C oscillator or supports external clocking
• Features TTL-compatible data inputs and outputs
• Provides diode protection on all inputs

Specialty Logic Applications

• Digital integrator applications
• System synchronizer circuits
• Delay line implementations

Specialty Logic Procurement Notes

Verify the specific suffix ELG for the SOEIAJ-16 package configuration. Confirm RoHS compliance and Pb-free status as indicated in the ordering information. Check for discontinuation notices regarding NLV prefixes or specific lot codes. Ensure the component meets AEC-Q100 requirements if automotive qualification is necessary for the application.

Specialty Logic Selection Notes

Select this component when multiple independent channels require contact debouncing within a single integrated circuit. The internal pullup resistors simplify interface design for Form A and B contacts. Consider the supply voltage range of 3.0 V to 18 V for compatibility with various logic families. Verify that the required delay aligns with the four-clock-period output latency characteristic.

Specialty Logic Part Context

This device belongs to the MC14490 family of hex contact bounce eliminators. It serves as a specialized interface solution between mechanical switches and digital logic systems. The architecture utilizes a 4-1/2-bit shift register per channel to ensure signal stability before output generation. It replaces discrete RC networks and gates typically used for debouncing tasks.

Specialty Logic Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.