EDD51323DBH-LS
AC Characteristics
(TA = −25°C to +85°C, VDD and VDDQ = 1.7V to 1.95V, VSS and VSSQ = 0V)
-5BLS
min.
5.0
-6ELS
min.
6.0
Parameter
Symbol
tCK
max.
—
max.
—
Unit
ns
Notes
Clock cycle time
CK high-level width
CK low-level width
tCH
0.45
0.55
0.55
0.45
0.55
0.55
tCK
tCK
tCL
0.45
0.45
min.
( tCH, tCL)
min.
( tCH, tCL)
CK half period
tHP
—
—
tCK
DQ output access time from CK, /CK
DQS-in cycle time
tAC
2.0
0.9
2.0
5.0
1.1
5.0
2.0
0.9
2.0
5.0
1.1
5.0
ns
2, 8
tDSC
tCK
ns
DQS output access time from CK, /CK tDQSCK
DQ-out high-impedance time from CK,
/CK
DQ-out low-impedance time from CK,
/CK
2, 8
5, 8
tHZ
—
5.0
—
—
5.0
—
ns
ns
tLZ
1.0
1.0
6, 8
DQS to DQ skew
tDQSQ
tQH
—
0.4
—
—
0.5
—
ns
3
4
DQ/DQS output hold time from DQS
Data hold skew factor
DQ and DM input setup time
DQ and DM input hold time
DQ and DM input pulse width
Read preamble
tHP − tQHS
tHP − tQHS
ns
tQHS
—
0.5
—
—
0.65
—
ns
tDS
0.48
0.48
1.6
0.9
0.4
0
0.6
0.6
1.6
0.9
0.4
0
ns
3
3
tDH
—
—
ns
tDIPW
tRPRE
tRPST
tWPRES
tWPRE
tWPST
—
—
ns
1.1
0.6
—
1.1
0.6
—
tCK
tCK
ns
Read postamble
Write preamble setup time
Write preamble
0.25
0.4
—
0.25
0.4
—
tCK
tCK
Write postamble
0.6
0.6
7
Write command to first DQS latching
transition
tDQSS
0.75
1.25
0.75
1.25
tCK
DQS falling edge to CK setup time
DQS falling edge hold time from CK
DQS input high pulse width
tDSS
tDSH
tDQSH
tDQSL
tIS
0.2
0.2
0.40
0.40
0.9
0.9
2.3
2
—
0.2
0.2
0.40
0.40
1.1
1.1
2.7
2
—
tCK
tCK
tCK
tCK
ns
—
—
—
—
DQS input low pulse width
—
—
Address and control input setup time
Address and control input hold time
Address and control input pulse width
—
—
3
3
3
tIH
—
—
ns
tIPW
—
—
ns
Mode register set command cycle time tMRD
—
—
tCK
ns
Active to Precharge command period
tRAS
40
120000
42
120000
Active to Active/Auto-refresh command
tRC
55
72
—
—
60
72
—
—
ns
ns
period
Auto-refresh to Active/Auto-refresh
command period
tRFC
Active to Read/Write delay
tRCD
tRP
15
15
—
—
18
18
—
—
ns
ns
Precharge to active command period
Column address to column address
delay
tCCD
1
—
1
—
tCK
Active to active command period
tRRD
tWR
10
15
—
—
12
15
—
—
ns
ns
Write recovery time
Preliminary Data Sheet E1432E20 (Ver. 2.0)
8
ELPIDA [ ELPIDA MEMORY ]
