參數(shù)資料
型號: MT48LC64M4A2
廠商: Micron Technology, Inc.
英文描述: SYNCHRONOUS DRAM
中文描述: 同步DRAM
文件頁數(shù): 51/62頁
文件大?。?/td> 1517K
代理商: MT48LC64M4A2
51
256Mb: x4, x8, x16 SDRAM
256MSDRAM_E.p65
Rev. E; Pub. 3/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
256Mb: x4, x8, x16
SDRAM
READ – DQM OPERATION
1
tCH
tCL
tCK
tRCD
CAS Latency
DQM/
DQML, DQMU
CKE
CLK
A0-A9, A11, A12
DQ
BA0, BA1
A10
tCMS
ROW
BANK
ROW
BANK
DON
T CARE
UNDEFINED
tAC
LZ
D
OUT
m
tHZ
tOH
D
OUT
m
+ 3
tHZ
D
OUT
m
+ 2
t
LZ
t
tCMH
COMMAND
NOP
NOP
NOP
ACTIVE
NOP
READ
NOP
NOP
NOP
tAC
tOH
tAC
tOH
tAH
tAS
tCMS
tCMH
tAH
tAS
tAH
tAS
tCKH
tCKS
ENABLE AUTO PRECHARGE
DISABLE AUTO PRECHARGE
COLUMN
m
2
T0
T1
T2
T4
T3
T5
T6
T7
T8
NOTE:
1. For this example, the burst length = 4, and the CAS latency = 2.
2. x16: A9, A11, and A12 =
Don
t Care
x8: A11 and A12 =
Don
t Care
x4: A12 =
Don
t Care
*CAS latency indicated in parentheses.
-7E
-75
SYMBOL*
t
CKS
t
CMH
t
CMS
t
HZ (3)
t
HZ (2)
t
LZ
t
OH
t
RCD
MIN
1.5
0.8
1.5
MAX
MIN
1.5
0.8
1.5
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
5.4
5.4
5.4
6
1
3
15
1
3
20
TIMING PARAMETERS
-7E
-75
SYMBOL*
t
AC (3)
t
AC (2)
t
AH
t
AS
t
CH
t
CL
t
CK (3)
t
CK (2)
t
CKH
MIN
MAX
5.4
5.4
MIN
MAX
5.4
6
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
0.8
1.5
2.5
2.5
7
7.5
0.8
0.8
1.5
2.5
2.5
7.5
10
0.8
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