W988D6FB_13 Datasheet, PDF (14/66 Pages) Winbond – 256Mb Mobile LPSDR

Parameter
Command Hold Time
Refresh Time
Mode register Set Cycle
Time
Ref to Ref/Active
Command period
Self Refresh exit to next
valid command delay
W988D6FB / W988D2FB
Sym
tCMH
tREF
tMRD
-6
Min. Max.
1
64
12
256Mb Mobile LPSDR
-75
Min. Max.
Unit
Note
1
-
ns
64
ms
15
-
ns
8
tRFC 72
72
-
ns
tXSR 115
115
-
ns
7.6.2 AC Test Condition
Symbol
VIH(min)
VIL(max)
VOTR
Parameter
Input High Voltage Level (AC)
Input Low Voltage Level (AC)
Output Signal Reference Level
Value
Unit
0.8 x VDDQ
V
0.2 x VDDQ
V
0.5 x VDDQ
V
I/O
Time Reference Load
Z₀ = 50 Ohms
Input signal transition time between VIH and VIL is assumed as 1 volts/ns.
20pF
- 14 -
Publication Release Date : August 15, 2013
Revision A01-004