IS65C256AL
IS62C256AL
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,3)
(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
Data Setup to Write End
Data Hold from Write End
-25 ns
Min. Max.
25
15
15
0
0
15
12
0
—
—
—
—
—
—
—
—
-45 ns
Min. Max.
45
35
25
0
0
25
20
0
—
—
—
—
—
—
—
—
ISSI
Unit
ns
ns
ns
ns
ns
ns
ns
ns
®
t
WC
t
SCS
t
AW
t
HA
t
SA
t
PWE
1,
t
PWE
2
(4)
t
SD
t
HD
Notes:
1. Test conditions assume signal transition times of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V and
output loading specified in Figure 1.
2. Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
3. 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.
4. Tested with
OE
HIGH.
AC WAVEFORMS
WRITE CYCLE NO. 1
(CE Controlled,
OE
is HIGH or LOW)
(1 )
t
WC
ADDRESS
VALID ADDRESS
t
SA
CE
t
SCS
t
AW
t
PWE1
t
PWE2
t
HZWE
t
HA
WE
t
LZWE
HIGH-Z
D
OUT
DATA UNDEFINED
t
SD
D
IN
t
HD
DATA
IN
VALID
CS_WR1.eps
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. A
03/17/06
7
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
