IS62WV51216BLL-55TI-TR ISSI, IS62WV51216BLL-55TI-TR Datasheet - Page 10

• Manufacturer Part Number: IS62WV51216BLL-55TI-TR
• Description: Semiconductors and Actives, Memory
• Manufacturer: ISSI

IS62WV51216ALL, IS62WV51216BLL
WRITE CYCLE SWITCHING CHARACTERISTICS
Notes:
1. Test conditions assume signal transition times of 5 ns or less, timing reference levels of 0.9V/1.5V, input pulse levels of 0.4 to
2. The internal write time is defined by the overlap of CS1 LOW, CS2 HIGH and UB or LB, and WE LOW. All signals must be in valid states to initiate a Write, but
3. Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
4. t
AC WAVEFORMS
WRITE CYCLE NO. 1
Notes:
1. WRITE is an internally generated signal asserted during an overlap of the LOW states on the CS1 , CS2 and WE inputs and at
2. WRITE = (CS1) [ (LB) = (UB) ] (WE).
10
Symbol
t
t
t
t
t
t
t
t
t
t
t
V
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.
least one of the LB and UB inputs being in the LOW state.
WC
AW
HA
PWB
SD
HD
HZWE
SCS1/
SA
PWE
LZWE
PWE
DD
-0.2V/0.4V to V
(4)
> t
(3)
t
(3)
SCS2
HZWE
Parameter
Write Cycle Time
CS1/CS2 to Write End
Address Setup Time to Write End
Address Hold from Write End
Address Setup Time
LB, UB Valid to End of Write
WE Pulse Width
Data Setup to Write End
Data Hold from Write End
WE LOW to High-Z Output
WE HIGH to Low-Z Output
+ t
ADDRESS
SD
LB, UB
when OE is LOW.
DOUT
DD
CS1
CS2
DIN
WE
-0.3V and output loading specified in Figure 1.
(1,2)
(CS1 Controlled, OE = HIGH or LOW)
t
DATA UNDEFINED
SA
Integrated Silicon Solution, Inc. — www.issi.com —
Min.
t
AW
45
35
35
35
35
20
—
0
0
0
5
t
HZWE
45ns
t
t
SCS1
SCS2
Max.
t
t
t
PWB
20
PWE
—
—
—
—
—
—
—
—
—
—
WC
(1,2)
HIGH-Z
(Over Operating Range)
t
SD
Min.
DATA-IN VALID
55
45
45
45
40
25
—
0
0
0
5
55 ns
Max.
—
—
—
—
—
—
—
—
—
20
—
t
HA
t
t
LZWE
HD
Min.
70
60
60
60
30
50
—
0
0
0
5
70 ns
Max.
30
—
—
—
—
—
—
—
—
—
—
ISSI
1-800-379-4774
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
02/24/05
Rev. B
®