W989D6DB Datasheet, PDF (29/64 Pages) Winbond – Standard Self Refresh Mode

W989D6DB / W989D2DB
9.6 AC Characteristics and Operating Condition
9.6.1 AC Characteristics
(Notes: 5, 6, 7)
Parameter
Ref/Active to Ref/Active Command Period
Active to precharge Command Period
Active to Read/Write Command Delay Time
Read/Write(a) to Read/Write(b) Command Period
Precharge to Active Command Period
Active(a) to Active(b) Command Period
Write Recovery Time
Write-Recovery Time (Last data to Read)
CLK Cycle Time
CLK High Level width
CL* = 3
CL* = 2
CLK Low Level width
Access Time from CLK
Output Data Hold Time
Output Data High Impedance Time
Output Data Low Impedance Time
CL* = 3
CL* = 2
CL* = 3
CL* = 2
Power Down Mode Entry Time
Transition Time of CLK (Rise and Fall)
Data-in Set-up Time
Data-in Hold Time
Address Set-up Time
Address Hold Time
CKE Set-up Time
CKE Hold Time
Command Set-up Time
Command Hold Time
Refresh Time
Mode Register Set Cycle Time
Ref to Ref/Active Command Period
Self Refresh Exit to next valid Command Delay
Sym.
t_RC
t_RAS
t_RCD
t_CCD
t_RP
t_RRD
t_WR
t_LDR
t_CK
t_CH
t_CL
t_AC
t_OH
t_HZ
t_LZ
t_SB
t_T
t_DS
t_DH
t_AS
t_AH
t_CKS
t_CKH
t_CMS
t_CMH
t_REF
t_MRD
t_RFC
t_XSR
-6
-75
Min. Max. Min. Max.
60
67.5
42 100000 45 100000
18
18
1
1
18
18
2
2
15
15
1
1
6 1000 7.5 1000
9.6 1000 9.6 1000
2.5
2.5
2.5
2.5
5
5.4
6
8
2.5
2.5
5
5.4
8
6
1.0
1.0
0
6
0
7.5
0.3 1.2 0.3 1.2
1.5
1.5
1
1
1.5
1.5
1
1
1.5
1.5
1
1
1.5
1.5
1
1
64
64
2
2
72
72
120
115
Unit
nS
nS
nS
t_CK
nS
t_CK
nS
t_CK
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
mS
t_CK
nS
nS
Notes
8
8
8
8
8
8
7
7
8
* CL = CAS Latency
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Publication Release Date: Mar. 19, 2014
Revision: A01-001