Samsung M471B1G73AH0 - Manual (Page 10)

- 10 -
Unbuffered SODIMM
datasheet
DDR3 SDRAM
Rev. 1.0
10. AC & DC Input Measurement Levels
10.1 AC & DC Logic Input Levels for Single-ended Signals
[ Table 1 ] 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 18.
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) and V
IH.CA
(AC150); V
IH.CA
(AC175) value is used when V
REF
+ 175mV is referenced and V
IH.CA
(AC150) value is
used when VREF + 150mV 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
(AC175) value is used when V
REF
- 175mV is referenced and V
IL.CA
(AC150) value is used
when V
REF
- 150mV is referenced.
[ Table 2 ] 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 18.
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) ; 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
Unit NOTE
Min. Max.
V
IH.CA
(DC100) DC input logic high V
REF
+ 100 V
DD
mV 1,5
V
IL.CA
(DC100) DC input logic low V
SS
V
REF
- 100 mV 1,6
V
IH.CA
(AC175) AC input logic high V
REF
+ 175 - mV 1,2,7
V
IL.CA
(AC175) AC input logic low - V
REF
- 175 mV 1,2,8
V
IH.CA
(AC150) AC input logic high V
REF
+150 - mV 1,2,7
V
IL.CA
(AC150) AC input logic low - V
REF
-150 mV 1,2,8
V
REFCA
(DC)
Reference Voltage for ADD,
CMD inputs
0.49*V
DD
0.51*V
DD
V 3,4
Symbol Parameter
DDR3-800/1066 DDR3-1333/1600
Unit NOTE
Min. Max. Min. Max.
V
IH.DQ
(DC100) DC input logic high 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 mV 1,6
V
IH.DQ
(AC175) AC input logic high V
REF
+ 175 - - - mV 1,2,7
V
IL.DQ
(AC175) AC input logic low - V
REF
- 175 - - mV 1,2,8
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
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
V 3,4