W988D6FB_13 Datasheet, PDF (13/66 Pages) Winbond – 256Mb Mobile LPSDR

W988D6FB / W988D2FB
7.6 AC Characteristics And AC Operating Conditions
7.6.1 AC Characteristics
*CL= CAS Latency; (Notes: 5,6,7)
Parameter
Sym
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
CLK Low Level width
Access Time from CLK
Output Data Hold Time
Output Data High
Impedance Time
Output Data Low
Impedance Time
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
CL * = 3
CL * = 2
CL * = 3
CL * = 2
CL * = 3
CL * = 2
tRC
tRAS
tRCD
tCCD
tRP
tRRD
tWR
tLDR
tCK
tCH
tCL
tAC
tOH
tHZ
tLZ
tSB
tT
tDS
tDH
tAS
tAH
tCKS
tCKH
tCMS
-6
Min. Max.
60
42 100000
18
1
18
12
15
1
6
1000
12
1000
2
2
5.4
6
2.5
5.4
6
1
0
6
0.3
1.2
1.5
1
1.5
1
1.5
1
1.5
256Mb Mobile LPSDR
-75
Min. Max.
72.5
-
Unit
ns
Note
8
50
100000
ns
8
18
-
ns
8
1
-
CLK
8
18
-
ns
8
15
-
ns
8
15
-
ns
1
CLK
7.5
1000
ns
12
1000
ns
2.5
-
ns
2.5
-
ns
-
5.4
ns
-
8
ns
2.5
-
ns
-
5.4
ns
7
-
6
ns
7
1
-
ns
0
7.5
ns
0.3
1.2
ns
1.5
-
ns
1
-
ns
1.5
-
ns
1
-
ns
1.5
-
ns
1
-
ns
1.5
-
ns
- 13 -
Publication Release Date : August 15, 2013
Revision A01-004