MT40A1G8WE-083EAAT Datasheet, PDF (286/358 Pages) Micron Technology – Automotive DDR4 SDRAM

8Gb: x8, x16 Automotive DDR4 SDRAM
Electrical Characteristics – AC and DC Output Measurement
Levels
Table 116: Differential Output Levels (Continued)
Parameter
AC differential output low measurement level (for output slew
rate)
Symbol
V_OL,diff(AC)
DDR4-1600 to DDR4-3200
–0.3 × V_DDQ
Unit
V
Note: 1. The swing of ±0.3 × V_DDQ is based on approximately 50% of the static single-ended out-
put peak-to-peak swing with a driver impedance of RZQ/7 and an effective test load of
50Ω to V_TT = V_DDQ at each differential output.
Using the same reference load used for timing measurements, output slew rate for fall-
ing and rising edges is defined and measured between V_OL,diff(AC) and V_OH,diff(AC) for dif-
ferential signals.
Table 117: Differential Output Slew Rate Definition
Description
Differential output slew rate for rising edge
Differential output slew rate for falling edge
Measured
From
To
V_OL,diff(AC)
V_OH,diff(AC)
V_OH,diff(AC)
V_OL,diff(AC)
Figure 226: Differential Output Slew Rate Definition
TR_diff
Defined by
[V_OH,diff(AC) - V_OL,diff(AC)ΔTR_diff
[V_OH,diff(AC) - V_OL,diff(AC)ΔTF_diff
V_OH,diff(AC)
TF_diff
V_OL,diff(AC)
CCMTD-1406124318-10419
8gb_auto_ddr4_dram.pdf - Rev. C 3/17 EN
286
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