The QT723R from Q-Tech Corporation is a General Crystal Oscillator with Frequency 1.5 to 125 MHz, Supply Voltage 1.8 V, Output_Voltage 0.1 to 0.9 V, Current 2.5 to 20 mA, Output Load 15 pF. Tags: Surface Mount, Ceramic. More details for QT723R can be seen below.