Datasheet

Single-ended AC & DC Output Levels
Table 96. Single-ended AC & DC output levels
Symbol
Parameter
DDR4-2400/2666
Unit
Note
V
OH(DC)
DC output high measurement level (for IV curve linearity)
1.1 x V
DDQ
V
V
OM(DC)
DC output mid measurement level (for IV curve linearity
0.8 x V
DDQ
V
V
OL(DC)
DC output low measurement level (for IV curve linearity)
0.5 x V
DDQ
V
V
OH(AC)
AC output high measurement level (for output SR)
(0.7 + 0.15) x V
DDQ
V
1
V
OL(AC)
AC output low measurement level (for output SR)
(0.7 - 0.15) x V
DDQ
V
1
Note 1. The swing of ±0.15 × V
DDQ
is based on approximately 50% of the static single-ended output peak-to-peak swing with a driver
impedance of RZQ/7Ω and an effective test load of 50Ω to V
TT
= V
DDQ
.
Differential AC & DC Output Levels
Table 97. Differential AC & DC output levels
Symbol
Parameter
DDR4-2400/2666
Unit
Note
VOHdiff(AC)
AC differential output high measurement level (for output SR)
+0.3 x V
DDQ
V
1
VOLdiff(AC)
AC differential output low measurement level (for output SR)
-0.3 x V
DDQ
V
1
Note 1. The swing of ±0.3 × V
DDQ
is based on approximately 50% of the static differential output peak-to-peak swing with a driver
impedance of RZQ/7Ω and an effective test load of 50Ω to V
TT
= V
DDQ
at each of the differential outputs.
AS4C256M16D4
Confidential
- 190 of 201 -
Rev.1.0 Aug.2019