With over 75 years of experience in the frequency control market, MMD Monitor/ Quartztek is a market leader in innovative timing solutions. MMD specializes in both commercial and high reliability products for communications, consumer, industrial, military, space, and high reliability markets.  MMD Monitor/Quartztek's portfolio of products include commercial and precision quartz crystals, oscillators, TCXO's, VCXO's, and OCXO's available in a wide variety of through-hole and surface mount packages. MMD's in-house design and manufacturing capabilities allows us to offer you the ultimate flexibility for your timing needs.