IS61LV256
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,2)
(Over Operating Range)
Symbol
Parameter
Write Cycle Time
CE
to Write End
Address Setup Time
to Write End
Address Hold
from Write End
Address Setup Time
WE
Pulse Width(OE High)
WE
Pulse Width(OE Low)
Data Setup to Write End
Data Hold from Write End
Min. Max.
-8 ns
Min. Max.
-10 ns
Min. Max.
-12 ns
Min. Max.
-15 ns
Min. Max.
-20 ns
Unit
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
1
t
PWE
2
t
SD
t
HD
8
7
7
0
0
7
6.5
4.5
0
0
3.5
10
8
8
0
0
10
7
5
0
0
4
12
8
8
0
0
12
8
6
0
0
6
15
10
10
0
0
15
10
7
0
0
7
20
12
12
0
0
20
12
10
0
0
7
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
HZWE
!
WE
LOW to High-Z Output
t
LZWE
!
WE
HIGH to Low-Z Output
Notes:
1. Test conditions assume signal transition times of 3 ns or less, timing reference levels of 1.5V, input pulse
levels of 0 to 3.0V and output loading specified in .igure 1.
2. The internal write time is defined by the overlap of
CE
LOW and
WE
LOW. All signals must be in valid
states to initiate a Write, but any one can go inactive to terminate the Write. The Data Input Setup and
Hold timing are referenced to the rising or falling edge of the signal that terminates the Write.
3. Tested with the load in .igure 2. Transition is measured ±500 mV from steady-state voltage. Not 100%
tested.
AC WAVE.ORMS
WRITE CYCLE NO. 1
(CE Controlled,
OE
is HIGH or LOW)
(1 )
t
WC
ADDRESS
VALID ADDRESS
t
SA
CE
t
SCE
t
HA
WE
t
AW
t
PWE1
t
PWE2
t
HZWE
t
LZWE
HIGH-Z
D
OUT
DATA UNDEFINED
t
SD
D
IN
t
HD
DATA
IN
VALID
6
Integrated Circuit Solution Inc.
SR004-0D
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
