參數(shù)資料
型號: HYB18L256160B
廠商: QIMONDA
英文描述: DRAMs for Mobile Applications 256-Mbit Mobile-RAM
中文描述: DRAM的針對移動(dòng)應(yīng)用256兆移動(dòng)RAM
文件頁數(shù): 20/58頁
文件大?。?/td> 1766K
代理商: HYB18L256160B
Data Sheet
Rev. 1.73, 2006-09
01302004-CZ2R-J9SE
20
HY[B/E]18L256160B[C/F]L-7.5
256-Mbit Mobile-RAM
TABLE 12
Timing Parameters for READ
During READ bursts, the valid data-out element from the starting column address is available following the CAS latency after
the READ command. Each subsequent data-out element is valid nominally at the next positive clock edge. Upon completion
of a READ burst, assuming no other READ command has been initiated, the DQs go to High-Z state.
Figure 13
and
Figure 14
show single READ bursts for each supported CAS latency setting.
FIGURE 13
Single READ Burst (CAS Latency = 2)
Parameter
Symbol
- 7.5
Units
Note
min.
max.
Access time from CLK
CL = 3
CL = 2
t
AC
t
AC
t
LZ
t
HZ
t
OH
t
DQZ
t
RC
t
RCD
t
RAS
t
RP
1.0
3.0
2.5
67
19
45
19
5.4
6.0
7.0
2
100k
ns
ns
ns
ns
ns
t
CK
ns
ns
ns
ns
DQ low-impedance time from CLK
DQ high-impedance time from CLK
Data out hold time
DQM to DQ High-Z delay (READ Commands)
ACTIVE to ACTIVE command period
ACTIVE to READ or WRITE delay
ACTIVE to PRECHARGE command period
PRECHARGE command period
1)
1) These parameters account for the number of clock cycles and depend on the operating frequency as follows:
no. of clock cycles = specified delay / clock period; round up to next integer.
1)
1)
1)
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W
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W
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W
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W
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123
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123
123
123
35(
123
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$& 7
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%D $
%D $
$
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3UH $ O
$3
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5RZ [
5RZ E
'2 Q
'2 Q
' 2 Q
' 2 Q
'4
$3 $X WR 3UHFKDUJH
'LV $3 'LVDEOH $X WR 3 HFKDUJH
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