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Slew Rate Definitions for Differential Input Signals Input slew rate for differential signals (CK, CK and DQS, DQS) are defined and measured as shown in table and figure below. Differential Input Slew Rate Definition Measured Description Differential input slew rate for rising edge (CK-CK and DQS-DQS) Differential input slew rate for falling edge (CK-CK and DQS-DQS) Defined by Min Max VILdiffmax VIHdiffmin [VIHdiffmin-VILdiffmax] / DeltaTRdiff VIHdiffmin VILdiffmax [VIHdiffmin-VILdiffmax] / DeltaTFdiff Notes: Differential Input Voltage (i.e. DQS-DQS; CK-CK) The differential signal (i.e. CK-CK and DQS-DQS) must be linear between these thresholds. Delta TRdiff VIHdiffmin 0 VILdiffmax Delta TFdiff Differential Input Slew Rate Definition for DQS, DQS and CK, CK Rev. 1.0/Sep. 2012 21
