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IC61C6416 Datasheet, PDF (75/80 Pages) Integrated Circuit Solution Inc – 64K X 16 HIGH-SPEED CMOS STATIC RAM
◁
HYB18T256324F–[16/20/22]
256-Mbit DDR SGRAM
Electrical Characteristics
4.13
Summary of timing parameters for –1.6, –2.0 and –2.2 ns speed sorts in DLL
on mode
Table 43 Timing Parameters for –1.6, –2.0 and –2.2 speed sorts
Parameter
Read Sym- Limit Values
latency bol
–1.6
–2.0
Unit Notes
–2.2
min max min max min max
Clock and Clock Enable
Clock Cycle Time
7
tCK7 1.6
6
tCK6 2.0
5
tCK5
—
System frequency
7
fCK7 300
6
fCK6 300
5
fCK5
—
Clock high level width
tCH
0.45
Clock low-level width
tCL
0.45
Minimum clock half period
tHP
0.45
Command and Address Setup and Hold Timing
3.3
3.3
—
600
500
—
0.55
0.55
—
2.0 4.0
2.0 4.0
——
250 500
250 500
——
0.45 0.55
0.45 0.55
0.45 —
2.2 4.0
2.2 4.0
2.7 4.0
250 455
250 455
250 370
0.45 0.55
0.45 0.55
0.45 —
ns
ns
ns
MHz
MHz
MHz
tCK
tCK
tCK 1)
Address/Command input setup time tIS
Address/Command input hold time tIH
Address/Command input pulse
tIPW
width
0.6 —
0.6 —
0.85 —
0.75 —
0.75 —
ns
0.75 —
0.75 —
ns
0.85 —
0.85 —
tCK
Mode Register Set Timing
Mode Register Set cycle time
tMRD 5
—
Mode Register Set to READ timing tMRDR 15
—
Row Timing
4
—
4
—
tCK
12 —
12 —
tCK
Row Cycle Time
tRC
Row Active Time
tRAS
ACT(a) to ACT(b) Command period tRRD
Row Precharge Time
tRP
Row to Column Delay Time for
Reads
tRCDRD
37.2
24.0
8.0
13.2
16.0
—
8 x tREFI
—
—
—
37.2
24.0
8.0
13.2
16.0
—
39.6
8 x tREFI 26.2
—
8.8
–
13.2
–
17.5
—
ns
8 x tREFI ns
—
ns
–
ns
–
ns
Row to Column Delay Time for
tRCDWR
tRCDWR(min) = tRCDRD(min) - (WL + 1) x tCK(min)
ns
Writes
Column Timing
CAS(a) to CAS(b) Command period tCCD 2
—
2
—
2
—
Write to Read Command Delay
tWTR 6.0
—
6.0 —
6.6 —
Read to Write command delay
tRTW
tRTW(min)= (CL+4-WL)
Write Cycle Timing Parameters for Data and Data Strobe
tCK 2)
ns 3)
tCK 4)
Write command to first WDQS
latching transition
tDQSS WL - WL
0.25 +0.25
WL - WL
WL - WL
tCK
0.25 +0.25 0.25 +0.25
Data-in and Data Mask to WDQS tDS
Setup Time
0.35 —
0.375 —
0.375 —
ns
Data Sheet
75
Rev. 1.11, 04-2005
10292004-DOXT-FS0U
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