參數(shù)資料
型號: HYB18H256321BF-14
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
中文描述: 8M X 32 SYNCHRONOUS GRAPHICS RAM MODULE, 0.25 ns, PBGA136
封裝: GREEN, PLASTIC, TFBGA-136
文件頁數(shù): 33/41頁
文件大小: 1302K
代理商: HYB18H256321BF-14
HYB18H256321BF
256-Mbit GDDR3
Internet Data Sheet
Rev. 0.80, 2007-09
09132007-07EM-7OYI
33
4.11
AC Timings for HYB18H256321BF
TABLE 19
Timing Parameters for HYB18H256321BF
Parameter
CAS latency
Symbol Limit Values
Unit
Note
–10
–11
–12
–14
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Clock and Clock Enable
System frequency
CL=13
CL= 12
CL= 11
CL =10
CL = 9
CL = 8
CL = 7
f
CK13
f
CK12
f
CK11
f
CK10
f
CK9
f
CK8
f
CK7
t
CH
t
CL
t
HP
TBD
400
400
400
400
400
0.45
0.45
0.45
1000
900
800
700
600
550
0.55
0.55
400
400
400
400
400
0.45
0.45
0.45
900
800
700
600
550
0.55
0.55
400
400
400
400
400
0.45
0.45
0.45
800
700
650
550
500
0.55
0.55
400
400
400
400
400
0.45
0.45
0.45
700
650
600
500
450
0.55
0.55
MHz
MHz
MHz
MHz
MHz
MHz
MHz
t
CK
t
CK
t
CK
1)
2)
1)
1)
1)
1)
Clock high level width
Clock low-level width
Minimum clock half period
Command and Address Setup and Hold Timing
Address/Command input setup time
Address/Command input hold time
Address/Command input pulse width
Mode Register Set Timing
Mode Register Set cycle time
Mode Register Set to READ timing
Row Timing
Row Cycle Time
Row Active Time
ACT(a) to ACT(b) Command period
Row Precharge Time
Row to Column Delay Time for Reads
Row to Column Delay Time for Writes
Column Timing
CAS(a) to CAS(b) Command period
Write to Read Command Delay
Read to Write command delay
Write Cycle Timing Parameters for Data and Data Strobe
Write command to first WDQS latching
transition
3)
t
IS
t
IH
t
IP
0.24
0.24
0.7
0.27
0.27
0.7
0.3
0.3
0.7
0.35
0.35
0.7
ns
ns
t
CK
t
MRD
t
MRDR
6
12
6
12
6
12
6
12
t
CK
t
CK
4)5)
3)
t
RC
t
RAS
t
RRD
t
RP
t
RCDRD
t
RCDWR
37
23
9
14
13
t
RCDWR(Min)
= max(
t
RCDRD(Min)
- (WL + 1)
×
t
CK
;2
×
t
CK
)
35
22
8
13
12
34
21
8
13
12
30
18
7
12
11
t
CK
t
CK
t
CK
t
CK
t
CK
t
CK
6)
7)
t
CCD
t
WTR
t
RTW
2
7
t
RTW
(min)= (CL + BL/2 +2 -WL)
2
6
2
6
2
5
t
CK
t
CK
t
CK
8)
9)
10)
t
DQSS
WL–
0.25
WL+
0.25
WL–
0.25
WL+
0.25
WL–
0.25
WL+
0.25
WL–
0.25
WL+
0.25
t
CK
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