Internet Data Sheet
HYS64T[32/64/128]xxxEDL–[25F/…/3.7](–)B2
Small Outlined DDR2 SDRAM Modules
3.3
Timing Characteristics
All Speed grades faster than DDR2-DDR400B comply with DDR2-DDR400B timing specifications(tCK = 5ns with tRAS = 40ns).
3.3.1
Speed Grade Definitions
Speed Grade Definition: Table 12 for DDR2–800; Table 13 for DDR2–667 and Table 14 for DDR2–533C.
TABLE 12
Speed Grade Definition Speed Bins for DDR2–800
Speed Grade
DDR2–800D
DDR2–800E
Unit
Note
QAG Sort Name
CAS-RCD-RP latencies
–2.5F
–2.5
5–5–5
6–6–6
tCK
Parameter
Symbol
Min.
Max.
Min.
Max.
—
1)2)3)4)
1)2)3)4)
1)2)3)4)
1)2)3)4)
1)2)3)4)5)
1)2)3)4)
1)2)3)4)
1)2)3)4)
Clock Frequency
@ CL = 3
@ CL = 4
@ CL = 5
@ CL = 6
tCK
5
8
5
8
ns
ns
ns
ns
ns
ns
ns
ns
tCK
3.75
2.5
8
3.75
3
8
tCK
8
8
tCK
2.5
45
8
2.5
45
60
15
15
8
Row Active Time
Row Cycle Time
RAS-CAS-Delay
Row Precharge Time
tRAS
tRC
tRCD
tRP
70000
—
70000
—
57.5
12.5
12.5
—
—
—
—
1) Timings are guaranteed with CK/CK differential Slew Rate of 2.0 V/ns. For DQS signals timings are guaranteed with a differential Slew
Rate of 2.0 V/ns in differential strobe mode and a Slew Rate of 1 V/ns in single ended mode.
2) The CK/CK input reference level (for timing reference to CK/CK) is the point at which CK and CK cross. The DQS / DQS, RDQS / RDQS,
input reference level is the crosspoint when in differential strobe mode.
3) Inputs are not recognized as valid until VREF stabilizes. During the period before VREF stabilizes, CKE = 0.2 x VDDQ is recognized as low.
4) The output timing reference voltage level is VTT
.
5) RAS.MAX is calculated from the maximum amount of time a DDR2 device can operate without a refresh command which is equal to 9 x tREFI
t
.
Rev. 1.1, 2007-01
15
08212006-PKYN-2H1B
QIMONDA [ QIMONDA AG ]
