Does anyone know of a newer version of a simple keypad interface chip (provides debouncing, encoding, etc.) for a 4 X 4 keypad? The device I've used in the past is the 74C922. While the chip still works very well, it is somewhat dated and may be a little hard to find. Also, it there's a surface-mount version, it would be better.
TIA
Dave
etc.
"starfire" schreef in bericht news:jOednQxMy8UugfvUnZ2dnUVZ snipped-for-privacy@supernews.com...
Chips like the 74C922 need to be connected to some controlling device, often a micro. These these days one takes somewhat bigger a micro and incorporates the keyboard function in it. Even if you need only the 74C922 function and cannot buy that chip anymore it's much cheaper to get an 8-bits micro (Microchip, Atmel or something similar) and program it then restarting the production of an obsolete chip. Let alone developing a whole new one.
petrus bitbyter
Many thanks to those responding... It looks like a dedicated micro for keypad interface is the way to go :)
Dave
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