The ECS-540-8-33-JTN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 54 MHz, Frequency Stability ±20 ppm, Frequency Tolerance ±20 ppm, Load Capacitance 8 pF, Equivalent Series Resistance 40. Tags: Surface Mount. More details for ECS-540-8-33-JTN-TR can be seen below.