MC14490F

Specialty Logic Overview

The MC14490F is a Hex Contact Bounce Eliminator IC manufactured by onsemi, housed in a 16-lead SOEIAJ package. It utilizes complementary MOS enhancement mode devices to eliminate extraneous level changes from mechanical contacts. The circuit generates a clean digital signal four clock periods after input stabilization, handling both make and break bounce events. It features an internal R-C oscillator requiring only one external capacitor for frequency adjustment, or supports an external clock source. The device operates within a supply voltage range of 3.0 V to 18 V and includes diode protection on all inputs.

Specialty Logic Feature Summary

• Six independent debouncers per package with single-line input capability
• Internal pullups on all data inputs for switched ground compatibility
• TTL compatible data inputs and outputs
• Cascadable architecture for extended time delays

Specialty Logic Applications

• Elimination of contact bounce in mechanical switches and relays
• Digital integrator and system synchronizer functions
• Delay line generation for timing operations
• Single pulse output generation for push button or relay contacts

Specialty Logic Procurement Notes

Verify the specific suffix 'F' corresponds to the SOEIAJ-16 package configuration. Confirm RoHS compliance status as datasheet revisions may affect environmental declarations. Check current production status against discontinuation notices for this specific package variant before finalizing procurement plans.

Specialty Logic Selection Notes

Select this component when multiple independent debounce channels are required in a compact surface-mount footprint. Ensure the application requires a delay of approximately four clock periods for signal stabilization. Verify that the operating temperature range of -55°C to +125°C meets the environmental requirements of the target system.

Specialty Logic Part Context

This part belongs to the MC14490 series of hex contact bounce eliminators. It is functionally identical to other package variants such as the MC14490DWG (SOIC) and MC14490PG (PDIP), differing primarily in physical housing dimensions and pin pitch. The F suffix specifically denotes the small outline external leaded joint package.

Specialty Logic Replacement Considerations

MC14490DWG

Specialty Logic FAQ

How is the clock frequency determined?

The clock frequency is derived from an internal R-C oscillator controlled by a single external capacitor connected between the OSCin and OSCout pins.

What happens to the outputs immediately after power-up?

Immediately after power-up, the outputs of the MC14490 are in indeterminate states until the internal logic stabilizes.