MC14490PG

Specialty Logic Overview

The MC14490PG 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 TTL-compatible data inputs/outputs. Operating voltage ranges from 3.0 V to 18 V, with an ambient temperature range of -55°C to +125°C.

Specialty Logic Feature Summary

• Six independent debouncers per package for simultaneous signal cleaning
• Internal pullup resistors on all data inputs support switched ground signals
• Schmitt trigger on the clock input ensures proper timing with slow edges
• Cascadable architecture allows for longer time delays and multiple timing signals

Specialty Logic Applications

• Eliminating bounce on make and break contacts of relays and push buttons
• System synchronizer and digital integrator applications
• Generating single pulse outputs for specific operations
• Creating asymmetrical timing circuits such as fast attack/slow release timers

Specialty Logic Procurement Notes

Verify the component matches the PDIP-16 package configuration specified in the datasheet. Confirm that the ordering suffix 'P' corresponds to the plastic dual in-line package variant. Ensure compliance with RoHS standards and Pb-free requirements as indicated in the manufacturer documentation. Check for any specific automotive qualification prefixes if required for the target application environment.

Specialty Logic Selection Notes

Select this component when a single-line input is needed to debounce both rising and falling edges of mechanical contacts without requiring Form C inputs. Consider the internal oscillator capability which minimizes external component count. Evaluate the TTL compatibility for direct interfacing with standard logic families. Assess the need for cascading capabilities if extended delay times are necessary for the system design.

Specialty Logic Part Context

The MC14490 belongs to the 4000 series CMOS logic family produced by onsemi. It is specifically designed as a specialized logic device for contact bounce elimination rather than general-purpose logic functions. The PG suffix denotes the PDIP-16 package variant, distinguishing it from surface-mount options like the DWG (SOIC) or F (SOEIAJ) packages within the same functional family.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers include MC14490DWG and MC14490F. These alternatives offer identical functional characteristics but differ in package type. Verify pinout compatibility and thermal management requirements when transitioning between through-hole and surface-mount variants.