SG3225xEN SPXO Standard Clock Oscillators Epson SG3225xEN SPXO Standard Clock Oscillators provide ultra-low jitter and tight stability in a small package and are suitable for networking applications with very high data rates. The series delivers wide-open-eye diagrams for high-speed (10Gbps, 25Gbps, 40Gbps, 100Gbps, 200Gbps, and 400Gbps) optical and electrical interfaces. To achieve ultra-low jitter and 50fs RMS jitter at 156.25MHz, Epson’s SG3225xEN SPXOs use an HFF (high-frequency fundamental) crystal and a unique low-noise oscillator IC. The excellent jitter performance enables superior eye diagrams for high-speed electrical and optical interfaces. To ensure consistent performance for complex designs, Epson E series SPXOs include an LDO (low drop-out) voltage regulator to protect the clock from power supply noise.