Mercury electronics has manufactured frequency controlled products since 1973. Mercury products include variety of crystals, oscillators & resonators: Surface mount and thru hole quartz crystals, clock oscillators, VCXO (voltage controlled crystal oscillator), TCXO (temperature controlled crystal oscillator), VCTCXO (voltage controlled temperature compensated crystal oscillator), OCXO (oven controlled crystal oscillators), timing modules, programmable oscillators and low EMI spread spectrum clock oscillators.