W949D6DB Datasheet, PDF (54/60 Pages) Winbond – Standard Self Refresh Mode

W949D6DB / W949D2DB
9.5 AC Characteristics and Operating Condition
[Recommended Operating Conditions: Notes 1-9]
PARAMETER
DQ Output Access Time from CK, CK
DQS Output Access Time from CK, CK
Clock high-level width
Clock low-level width
CL = 3
CL = 2
CL = 3
CL = 2
Clock half period
Clock cycle time
CL = 3
CL = 2
SYM.
tAC
tDQSCK
tCH
tCL
tHP
tCK
-5
MIN. MAX.
2.0
5.0
2.0
6.5
2.0
5.0
2.0
6.5
0.45 0.55
0.45 0.55
Min.
(tCL,tCH)
5
12
-6
MIN. MAX.
2.0
5.0
2.0
6.5
2.0
5.0
2.0
6.5
0.45 0.55
0.45 0.55
Min.
(tCL,tCH)
6
12
fast
0.48
0.6
DQ and DM input setup time
tDS
slow
0.58
0.7
DQ and DM input hold time
fast
0.48
0.6
tDH
slow
0.58
0.7
DQ and DM input pulse width
tDIPW
1.4
1.6
fast
0.9
1.1
Address and control input setup time
tIS
slow
1.1
1.3
fast
0.9
1.1
Address and control input hold time
tIH
slow
1.1
1.3
Address and control input pulse width
tIPW
2.3
2.6
Data-out Low-impedance Time from CK, CK
Data-out High-impedance Time from CK, CL = 3
CK
CL = 2
DQS-DQ skew
DQ/DQS output hold time from DQS
Data hold skew factor
Write command to 1st DQS latching transition
DQS input high-level width
DQS input low-level width
DQS falling edge to CK setup time
DQS falling edge hold time from CK
MODE REGISTER SET command period
Write preamble setup time
Write postamble
Write preamble
Read preamble
CL = 3
CL = 2
Read postamble
ACTIVE to PRECHARGE command period
tLZ
tHZ
tDQSQ
tQH
tQHS
tDQSS
tDQSH
tDQSL
tDSS
tDSH
tMRD
tWPRES
tWPST
tWPRE
tRPRE
tRPST
tRAS
1.0
1.0
5.0
6.5
0.4
tHP -
tQHS
tHP -
tQHS
0.5
0.75 1.25 0.75
0.4
0.6
0.4
0.4
0.6
0.4
0.2
0.2
0.2
0.2
2
2
0
0
0.4 0.6 0.4
0.25
0.25
0.9
1.1
0.9
0.5
1.1
0.5
0.4
0.6
0.4
40 70,000 42
5.0
6.5
0.5
065
1.25
0.6
0.6
0.6
1.1
1.1
0.6
70,000
UNIT
nS
nS
tCK
tCK
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
tCK
tCK
tCK
tCK
tCK
tCK
nS
tCK
tCK
tCK
tCK
tCK
nS
NOTES
10,11
12
12
13,14,15
13,14,16
13,14,15
13,14,16
17
15,18
16,18
15,18
16,18
17
19
19
20
11
11
21
22
23
23
- 54 -
Publication Release Date: Oct. 08, 2014
Revision: A01-003