I could not find the 922 or 923 in any of my catalogs. Farnell are usually quite good , but even they dont list it now.

A much better chip now is the QT60161 Qprox Capacitance sensor. Using it I no longer have to drill front panels , which for one of my designs that is used in pig farms is a real plus.

The only downside (for me anyway) is the loss of tactile response. So I use a two tone buzzer to give an audible "click" .



http://www.qprox.com/products/qmatrix.php