IDT70V38L15PFI IDT [Integrated Device Technology], IDT70V38L15PFI Datasheet - Page 8

• Manufacturer Part Number: IDT70V38L15PFI
• Description: HIGH-SPEED 3.3V 64K x 18 DUAL-PORT STATIC RAM
• Manufacturer: IDT [Integrated Device Technology]

Timing Waveform of Write Cycle No. 1, R/W Controlled Timing
Timing Waveform of Write Cycle No. 2, CE Controlled Timing
NOTES:
1. R/W or CE or UB and LB = V
2. A write occurs during the overlap (t
3. t
4. During this period, the I/O pins are in the output state and input signals must not be applied.
5. If the CE or SEM = V
6. Timing depends on which enable signal is asserted last, CE or R/W.
7. This parameter is guaranteed by device characterization, but is not production tested. Transition is measured 0mV from steady state with the Output Test Load
8. If OE = V
9. To access RAM, CE = V
10. Refer to Truth Table I - Chip Enable.
CE or SEM
CE or SEM
ADDRESS
ADDRESS
IDT70V38L
High-Speed 3.3V 64K x 18 Dual-Port Static RAM
DATA
UB or LB
UB or LB
(Figure 2).
placed on the bus for the required t
specified t
WR
DATA
DATA
is measured from the earlier of CE or R/W (or SEM or R/W) going HIGH to the end of write cycle.
R/W
R/W
OUT
OE
IN
IN
WP
IL
(9,10)
(9)
(9)
(9,10)
.
during R/W controlled write cycle, the write pulse width must be the larger of t
IL
transition occurs simultaneously with or after the R/W = V
IL
and SEM = V
IH
during all address transitions.
t
EW
AS
DW
or t
t
(6)
AS
. If OE = V
IH
WP
. To access semaphore, CE = V
(6)
) of a CE = V
(4)
IH
during an R/W controlled write cycle, this requirement does not apply and the write pulse can be as short as the
IL
and a R/W = V
t
WZ
(7)
t
t
AW
AW
t
t
WC
WC
t
EW
IH
t
IL
WP
for memory array writing cycle.
and SEM = V
(2)
(2)
IL
8
transition, the outputs remain in the High-impedance state.
IL
. t
t
t
DW
EW
DW
must be met for either condition.
WP
or (t
t
WZ
Industrial and Commercial Temperature Ranges
WR
+ t
(3)
DW
t
t
) to allow the I/O drivers to turn off and data to be
t
DH
DH
WR
t
OW
(3)
t
HZ
(7)
(1,5)
(4)
(1,5,8)
4850 drw 08
4850 drw 07