MMD Components (Monitor +ACY- Quartztek) has produced what they 
claim is the smallest quartz crystal available in production 
quantities.  Measuring only 2 x 2.5 mm, with a 0.57-mm profile, the 
X series surface-mountable crystals can be used in any application 
where space is limited and a frequency reference is required. They 
are available for frequencies from 16 to 60 MHz with frequency 
tolerance/stability rate as high as +ALE-50 PPM/+ALE-100 PPM. The 
units are fully RoHS compliant and compatible with lead-free reflow 
profiles. They are supplied in a hermetic four-pad ceramic package 
and delivered on tape-and-reel packaging for use with automated 
assembly equipment. 

MMD Components (Monitor +ACY- Quartztek) (