EDD1204ALTA, EDD1208ALTA, EDD1216ALTA
13.6.4 Synchronous Characteristics Example
Symbol
tCK =7.5 ns
tCK =10 ns
MIN. MAX.
Unit
MIN.
MAX.
4.1
tCH
tCL
3.4
3.4
6.75
3
4.5
4.5
9
5.5
5.5
11
6
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.1
tRPRE
tRPST
tWPRE
tWPST
tDQSS
tDQSH
tDQSL
tDSS
8.25
4.5
4
1.88
3
2.5
4
4.5
9.4
6
5.6
2.63
2.63
1.5
1.5
7.5
7.5
3.5
3.5
2
12.5
tDSH
2
tWTR
10
13.6.5 Asynchronous Characteristics
Parameter
Symbol
tRC
-7A
-75
-1A
Unit
ns
MIN.
MAX.
MIN.
65
MAX.
MIN.
70
MAX.
ACT to REF/ACT command period
(operation)
65
REF to REF/ACT command period (refresh)
ACT to PRE command period
PRE to ACT command period
ACT to READ/WRITE delay
ACT(one) to ACT(another) command period
Write recovery time
tRFC
tRAS
tRP
75
45
20
20
15
2
75
45
20
20
15
2
80
50
20
20
15
2
ns
ns
120,000
120,000
120,000
ns
tRCD
tRRD
tWR
tDAL
ns
ns
CLK
ns
Auto precharge write recovery time + precharge
time
35
35
35
Mode register set command cycle time
Exit self refresh to command
Average periodic Refresh interval
tMRD
tXSNR
tREF1
15
75
15
75
15
80
ns
ns
µs
15.6
15.6
15.6
42
Preliminary Data Sheet E0136E30
ELPIDA [ ELPIDA MEMORY ]
