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Device Comparison ¦ Meets Rambus® Extended Data Rate (XDR™) clocking requirements ¦ 25 ps typical cycle-to-cycle jitter . –135 dBc/Hz typical phase noise at 20 MHz offset ¦ 100 or 133 MHz differential clock input CY24271 CY24272 SDA hold time = 300 ns (SMBus compliant) SDA hold time = 0 ns (I2C compliant) RRC = 200. typical (Rambus standard drive) RRC = 295. minimum (Reduced output drive) ¦ 300–667 MHz high speed clock support ¦ Quad (open drain) differential output drivers ¦ Supports frequency