70V28L20PFI IDT, Integrated Device Technology Inc, 70V28L20PFI Datasheet - Page 8

• Manufacturer Part Number: 70V28L20PFI
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 70V28L20PFI

• Density: 1Mb
• Access Time (max): 20ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 3.3V
• Address Bus: 16b
• Package Type: TQFP
• Operating Temp Range: -40C to 85C
• Number Of Ports: 2
• Supply Current: 220mA
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Word Size: 16b
• Number Of Words: 64K
• Lead Free Status / Rohs Status: Not Compliant

Timing Waveform of Write Cycle No. 1, R/W Controlled Timing
Timing Waveform of Write Cycle No. 2, CE Controlled Timing
CE or SEM
ADDRESS
CE or SEM
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.
ADDRESS
DATA
UB or LB
IDT70V28L
High-Speed 3.3V 64K x 16 Dual-Port Static RAM
UB or LB
DATA
(Figure 2).
placed on the bus for the required t
specified t
DATA
WR
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
(9)
WP
(9,10)
(9,10)
(9)
IL
.
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
t
AS
(6)
or t
. If OE = V
IH
(6)
WP
. To access semaphore, CE = V
) 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
t
and a R/W = V
WZ
(7)
t
t
AW
AW
t
WC
t
WC
t
t
EW
WP
IH
IL
and SEM = V
for memory array writing cycle.
(2)
(2)
IL
8
transition, the outputs remain in the High-impedance state.
IL
. t
t
t
DW
DW
EW
must be met for either condition.
WP
or (t
t
WZ
WR
Industrial and Commercial Temperature Ranges
+ t
(3)
DW
t
t
DH
t
DH
) to allow the I/O drivers to turn off and data to be
WR
t
OW
(3)
t
HZ
(7)
(4)
(1,5)
(1,5,8)
4849 drw 08
4849 drw 07
.