AS4C128M16D3A-12BIN
- Slew Rate Definition for Differential Input Signals
Input slew rate for differential signals (CK, CK# and DQS, DQS#) are defined and measured as shown below.
Table 30. Differential Input Slew Rate Definition
Measured
Description
Defined by
From
To
Differential input slew rate for rising edge
(CK, CK# and DQS, DQS#)
[VIHdiffmin-VILdiffmax] /
DeltaTRdiff
VILdiffmax
VIHdiffmin
Differential input slew rate for falling edge
(CK, CK# and DQS, DQS#)
[VIHdiffmin-VILdiffmax] /
DeltaTFdiff
VIHdiffmin
VILdiffmax
NOTE: The differential signal (i.e., CK, CK# and DQS, DQS#) must be linear between these thresholds.
Table 31. Single-ended AC and DC Output Levels
-12
Symbol
VOH(DC)
VOM(DC)
VOL(DC)
VOH(AC)
VOL(AC)
Parameter
Unit Note
DC output high measurement level (for IV curve linearity)
DC output mid measurement level (for IV curve linearity)
DC output low measurement level (for IV curve linearity)
AC output high measurement level (for output SR)
AC output low measurement level (for output SR)
0.8 x VDDQ
V
V
V
0.5 x VDDQ
0.2 x VDDQ
VTT + 0.1 x VDDQ
VTT - 0.1 x VDDQ
V
V
1
1
NOTE 1: The swing of ± 0.1 × VDDQ is based on approximately 50% of the static single-ended output high or low swing with
a driver impedance of 40 Ωand an effective test load of 25 Ωto VTT = VDDQ/2.
Table 32. Differential AC and DC Output Levels
-12
Symbol
Parameter
Unit Note
VOHdiff(AC) AC differential output high measurement level (for output SR)
+ 0.2 x VDDQ
- 0.2 x VDDQ
V
1
VOLdiff(AC) AC differential output low measurement level (for output SR)
V
1
NOTE 1: The swing of ± 0.2 × VDDQ is based on approximately 50% of the static single-ended output high or low swing with
a driver impedance of 40 Ωand an effective test load of 25 Ωto VTT = VDDQ/2 at each of the differential outputs.
Confidential
-54／83-
Rev. 1.0 May 2016
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
