®
IS62LV12816BL/LL
WRITE CYCLE SWITCHING CHARACTERISTICS(1,2) (Over Operating Range)
ISSI
-55
-70
-100
Symbol
tWC
Parameter
Min. Max.
Min. Max.
Min. Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Write Cycle Time
55
50
50
0
—
—
—
—
—
—
—
—
—
30
—
70
65
65
0
—
—
—
—
—
—
—
—
—
30
—
100
80
80
0
—
—
—
—
—
—
—
—
—
40
—
1
tSCE
tAW
CE to Write End
Address Setup Time to Write End
Address Hold from Write End
Address Setup Time
tHA
2
tSA
0
0
0
tPWB
tPWE
tSD
LB, UB Valid to End of Write
WE Pulse Width
45
45
25
0
60
60
30
0
80
80
40
0
3
Data Setup to Write End
Data Hold from Write End
WE LOW to High-Z Output
WE HIGH to Low-Z Output
tHD
(3)
tHZWE
—
5
—
5
—
5
4
(3)
tLZWE
Notes:
1. Test conditions assume signal transition times of 3 ns or less, timing reference levels of 1.3V, input pulse levels of 0.4V to 2.2V
and output loading specified in Figure 1.
2. The internal write time is defined by the overlap of CE LOW and UB or LB, 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.
5
3. Tested with the load in Figure 2. Transition is measured 500 mV from steady-state voltage. Not 100ꢀ tested.
6
AC WAVEFORMS
WRITE CYCLE NO. 1(1,2) (CE Controlled, OE = HIGH or LOW)
7
t
WC
VALID ADDRESS
SCS
ADDRESS
8
t
SA
t
t
HA
CE
t
AW
9
t
tPPWWEE21
WE
t
PBW
10
11
12
UB, LB
t
HZWE
t
LZWE
HIGH-Z
DATA UNDEFINED
DOUT
t
SD
t
HD
DATAIN VALID
D
IN
UB_CSWR1.eps
Notes:
1. WRITE is an internally generated signal asserted during an overlap of the LOW states on the CE and WE inputs and at least one
of the LB and UB inputs being in the LOW state.
2. WRITE = (CE) [ (LB) = (UB) ] (WE).
Integrated Silicon Solution, Inc. — 1-800-379-4774
7
PRELIMINARY INFORMATION Rev. 00B
02/29/00