- on Education & Information
- Published in issue 7/2004 on page 0
The Eternal 555
You may not realise this, but the 555 timer IC has been in existence for over 30 years. The chip was originally manufactured by Signetics. In the first three months following its introduction (1972) over half a million of them were sold. Moreover, it has stayed successful: since that time the 555 has been the most popular IC sold every year!