- 11 -
datasheetK4B4G1646B DDR3 SDRAM
Rev. 1.0
8. AC & DC Input Measurement Levels
8.1 AC & DC Logic input levels for single-ended signals
[ Table 7 ] Single-ended AC & DC input levels for Command and Address
NOTE :
1. For input only pins except RESET
, V
REF
= V
REFCA
(DC)
2. See ’Overshoot/Undershoot Specification’ on page 19.
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. V
IH
(dc) is used as a simplified symbol for V
IH.CA
(DC100)
6. V
IL
(dc) is used as a simplified symbol for V
IL.CA
(DC100)
7. V
IH
(ac) is used as a simplified symbol for V
IH.CA
(AC175), V
IH.CA
(AC150), V
IH.CA
(AC135) and V
IH.CA
(AC125); V
IH.CA
(AC175) value is used when V
REF
+ 175mV is referenced
, V
IH.CA
(AC150) value is used when VREF + 150mV is referenced, V
IH.CA
(AC135) value is used when VREF + 135mV is referenced and V
IH.CA
(AC125) value is used when
VREF + 125mV is referenced.
8. V
IL
(ac) is used as a simplified symbol for V
IL.CA
(AC175) and V
IL.CA
(AC150), V
IL.CA
(AC135) and V
IL.CA
(AC125); V
IL.CA
(AC175) value is used when V
REF
- 175mV is refer-
enced, V
IL.CA
(AC150) value is used when V
REF
- 150mV is referenced, V
IL.CA
(AC135) value is used when V
REF
- 135mV is referenced and V
IL.CA
(AC125) value is used
when V
REF
- 125mV is referenced.
[ Table 8 ] Single-ended AC & DC input levels for DQ and DM
NOTE :
1. For input only pins except RESET
, V
REF
= V
REFDQ
(DC)
2. See ’Overshoot/Undershoot Specification’ on page 19.
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. V
IH
(dc) is used as a simplified symbol for V
IH.DQ
(DC100)
6. V
IL
(dc) is used as a simplified symbol for V
IL.DQ
(DC100)
7. V
IH
(ac) is used as a simplified symbol for V
IH.DQ
(AC175), V
IH.DQ
(AC150) and V
IH.DQ
(AC135) ; V
IH.DQ
(AC175) value is used when V
REF
+ 175mV is referenced,
V
IH.DQ
(AC150) value is used when V
REF
+ 150mV is referenced.
8. V
IL
(ac) is used as a simplified symbol for V
IL.DQ
(AC175), V
IL.DQ
(AC150) ; V
IL.DQ
(AC175) value is used when V
REF
- 175mV is referenced, V
IL.DQ
(AC150) value is used when
V
REF
- 150mV is referenced.
Symbol Parameter
DDR3-800/1066/1333/1600 DDR3-1866/2133
Unit NOTE
Min. Max. Min. Max.
V
IH.CA
(DC100)
DC input logic high
V
REF
+ 100 V
DD
V
REF
+ 100 V
DD
mV 1,5
V
IL.CA
(DC100)
DC input logic low
V
SS
V
REF
- 100 V
SS
V
REF
- 100
mV 1,6
V
IH.CA
(AC175)
AC input logic high
V
REF
+ 175
Note 2 - - mV 1,2,7
V
IL.CA
(AC175)
AC input logic low Note 2
V
REF
- 175
--mV1,2,8
V
IH.CA
(AC150)
AC input logic high
V
REF
+150
Note 2 - - mV 1,2,7
V
IL.CA
(AC150)
AC input logic low Note 2
V
REF
-150
--mV1,2,8
V
IH.CA
(AC135)
AC input logic high - -
V
REF
+ 135
Note 2 mV 1,2,7
V
IL.CA
(AC135)
AC input logic low - - Note 2
V
REF
- 135
mV 1,2,8
V
IH.CA
(AC125)
AC input logic high - -
V
REF
+125
Note 2 mV 1,2,7
V
IL.CA
(AC125)
AC input logic low - - Note 2
V
REF
-125
mV 1,2,8
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
DDR3-800/1066 DDR3-1333/1600 DDR3-1866/2133
Unit NOTE
Min. Max. Min. Max. Min. Max.
V
IH.DQ
(DC100)
DC input logic high
V
REF
+ 100 V
DD
V
REF
+ 100 V
DD
V
REF
+ 100 V
DD
mV 1,5
V
IL.DQ
(DC100)
DC input logic low
V
SS
V
REF
- 100 V
SS
V
REF
- 100 V
SS
V
REF
- 100
mV 1,6
V
IH.DQ
(AC175)
AC input logic high
V
REF
+ 175
NOTE 2----mV1,2,7
V
IL.DQ
(AC175)
AC input logic low NOTE 2
V
REF
- 175
----mV1,2,8
V
IH.DQ
(AC150)
AC input logic high
V
REF
+ 150
NOTE 2
V
REF
+ 150
NOTE 2 - - mV 1,2,7
V
IL.DQ
(AC150)
AC input logic low NOTE 2
V
REF
- 150
NOTE 2
V
REF
- 150
- - mV 1,2,8
V
IH.DQ
(AC135)
AC input logic high - - - -
V
REF
+ 135
NOTE 2 mV 1,2,7
V
IL.DQ
(AC135)
AC input logic low - - - - NOTE 2
V
REF
- 135
mV 1,2,8
V
REF
DQ
(DC)
Reference Voltage for DQ,
DM inputs
0.49*V
DD
0.51*V
DD
0.49*V
DD
0.51*V
DD
0.49*V
DD
0.51*V
DD
V3,4