256Mb: x4, x8, x16 DDR SDRAM
Electrical Specifications – DC and AC
Table 15:
Electrical Characteristics and Recommended AC Operating Conditions (-75) (continued)
Notes: 1–6, 16–18, and 34 apply to the entire table; Notes appear on page 35;
0°C
T
A
70°C; V
DDQ
= 2.5V ±0.2V, V
DD
= 2.5V ±0.2V
AC Characteristics
Parameter
Internal WRITE-to-READ command delay
Exit SELF REFRESH-to-non-READ command
Exit SELF REFRESH-to-READ command
Data valid output window
Symbol
t
WTR
t
XSNR
t
XSRD
-75
Min
Max
Units
t
CK
Notes
n/a
1
–
75
–
200
–
t
QH -
t
DQSQ
ns
t
CK
ns
Table 16:
Input Slew Rate Derating Values for Addresses and Commands
Note: 15 applies to the entire table; Notes appear on page 35;
0°C
T
A
70°C; V
DDQ
= 2.5V ±0.2V, V
DD
= 2.5V ±0.2V
Speed
-75Z/-75E
-75Z/-75E
-75Z/-75E
Slew Rate
0.500 V/ns
0.400 V/ns
0.300 V/ns
t
IS
t
IH
1
1
1
Units
ns
ns
ns
1.00
1.05
1.10
Table 17:
Input Slew Rate Derating Values for DQ, DQS, and DM
Note: 32 applies to the entire table; Notes appear on page 35;
0°C
T
A
70°C; V
DDQ
= 2.5V ±0.2V, V
DD
= 2.5V ±0.2V
Speed
-75Z/-75E
-75Z/-75E
-75Z/-75E
Slew Rate
0.500 V/ns
0.400 V/ns
0.300 V/ns
t
DS
t
DH
Units
ns
ns
ns
0.50
0.55
0.60
0.50
0.55
0.60
PDF: 09005aef80768abb/Source: 09005aef82a95a3a
DDR_x4x8x16_Core2.fm - 256Mb DDR: Rev. S, Core DDR: Rev. E 9/12 EN
34
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