ON Semiconductor MC14490DW Product Overview

The MC14490DW from ON Semiconductor is a versatile, hex contact bounce eliminator integrated circuit designed to interface directly with switching devices and mechanical contacts. This robust IC is particularly useful in applications where mechanical switch bounce creates undesirable effects in digital systems, such as in keyboards, control panels, and digital input interfaces. The MC14490DW effectively eliminates bounce by providing a clean, bounce-free output signal upon the detection of a switch closure.

Housed in a SOIC-16 package, the MC14490DW operates over a wide voltage range of 3V to 18V, making it compatible with a variety of logic levels and suitable for use in both TTL and CMOS systems. The IC features six independent switch debouncer circuits, each capable of cleaning the signals from a mechanical switch or contact. This level of integration reduces component count and simplifies design complexity, leading to more reliable and compact electronic systems.

The device is equipped with an internal oscillator that sets the switch recognition time interval, ensuring that any bounce-related transitions are effectively filtered out. The fast response time of the MC14490DW guarantees that legitimate switch transitions are processed with minimal delay, preserving the responsiveness of the user interface. Furthermore, the debouncer circuits can be connected in series for applications requiring extended switch closure times, providing additional flexibility in design.

The MC14490DW's non-inverting buffer outputs can directly drive CMOS or LSTTL loads, simplifying the interfacing process. The IC is also characterized for operation from -40°C to +85°C, making it suitable for use in a wide range of environmental conditions. With its high noise immunity and low power consumption, the MC14490DW is an excellent choice for any application requiring reliable switch debouncing.

In summary, the MC14490DW from ON Semiconductor is an essential component for any designer looking to ensure clean and reliable digital inputs from mechanical switches and contacts. Its ease of use, combined with its robust feature set, makes it an ideal solution for a wide array of applications in the consumer, industrial, and automotive markets.