Datasheet

16 of 39
DDR3 SDRAM
Rev. 1.03 July 2009
Unbuffered DIMM
12.0 AC & DC Input Measurement Levels
12.1 AC & DC Logic Input Levels for Single-ended Signals
Single Ended AC and DC input levels for Command and Address
Note :
1. For input only pins except RESET
, V
REF
= V
REFCA
(DC)
2. See "Overshoot and Undershoot specifications" section.
3. The AC peak noise on V
REF
may not allow V
REF
to deviate from V
REF
(DC) by more than ± 1% V
DD
(for reference : approx. ± 15mV)
4. For reference : approx. V
DD
/2 ± 15mV
Single Ended AC and DC input levels for DQ and DM
Note :
1. For input only pins except RESET
, V
REF
= V
REFDQ
(DC)
2. See 9.6 "Overshoot and Undershoot specifications" section.
3. The AC peak noise on V
REF
may not allow V
REF
to deviate from V
REF
(DC) by more than ± 1% V
DD
(for reference : approx. ± 15mV)
4. For reference : approx. V
DD
/2 ± 15mV
5. Single ended swing requirement for DQS - DQS
is 350mV (peak to peak). Differential swing for DQS - DQS is 700mV (peak to peak).
Symbol Parameter
DDR3-1066 DDR3-1333
Unit Notes
Min. Max. Min. Max.
V
IH.CA
(DC)
DC input logic high
V
REF
+ 100 V
DD
V
REF
+ 100 V
DD
mV 1
V
IL.CA
(DC)
DC input logic low
V
SS
V
REF
- 100 V
SS
V
REF
- 100
mV 1
V
IH.CA
(AC)
AC input logic high
V
REF
+ 175
-
V
REF
+ 175
-mV1,2
V
IL.CA
(AC)
AC input logic low -
V
REF
- 175
-
V
REF
- 175
mV 1,2
V
IH.CA
(AC150)
AC input logic high - -
V
REF
+150
-mV1,2
V
IL.CA
(AC150)
AC input logic low - - -
V
REF
-150
mV 1,2
V
REFCA
(DC)
Reference Voltage for ADD,
CMD inputs
0.49*V
DD
0.51*V
DD
0.49*V
DD
0.51*V
DD
V3,4
Symbol Parameter
DDR3-1066 DDR3-1333/1600
Unit Notes
Min. Max. Min. Max.
V
IH.DQ
(DC100)
DC input logic high
V
REF
+ 100 V
DD
V
REF
+ 100 V
DD
mV 1
V
IL.DQ
(DC100)
DC input logic low
V
SS
V
REF
- 100 V
SS
V
REF
- 100
mV 1
V
IH.DQ
(AC175)
AC input logic high
V
REF
+ 175
-
V
REF
+ 150
- mV 1,2,5
V
IL.DQ
(AC175)
AC input logic low -
V
REF
- 175
-
V
REF
- 150
mV 1,2,5
V
IH.DQ
(AC150)
AC input logic high
V
REF
+ 150
Note 2 - - mV 1,2,5
V
IL.DQ
(AC150)
AC input logic low Note 2
V
REF
- 150
- - mV 1,2,5
V
REF
DQ
(DC)
I/O Reference Voltage(DQ)
0.49*V
DD
0.51*V
DD
0.49*V
DD
0.51*V
DD
V3,4