70V28L20PFI IDT, Integrated Device Technology Inc, 70V28L20PFI Datasheet - Page 9

• 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 Semaphore Read after Write Timing, Either Side
NOTES:
1. CE = V
2. "DATA
Timing Waveform of Semaphore Write Contention
NOTES:
1. D
2. All timing is the same for left and right ports. Port "A" may be either left or right port. "B" is the opposite from port "A".
3. This parameter is measured from R/W
4. If t
IDT70V28L
High-Speed 3.3V 64K x 16 Dual-Port Static RAM
OR
SPS
= D
A
SEM
is not satisfied,the semaphore will fall positively to one side or the other, but there is no guarantee which side will be granted the semaphore flag.
OUT
R/W
IH
0
OL
-A
I/O
OE
or UB and LB = V
VALID" represents all I/O's (I/O
= V
2
IL
, CE
SIDE
SIDE
L
= CE
IH
R
(2)
(2)
= V
for the duration of the above timing (both write and read cycle) (Refer to Chip Enable Truth Table).
"A"
"B"
IH
or both UB and LB = V
t
AS
"A"
VALID ADDRESS
or SEM
A
A
0
t
AW
- I/O
0"A"
0"B"
SEM
SEM
Write Cycle
R/W
R/W
15
-A
-A
"A"
) equal to the semaphore value.
t
t
2"A"
2"B"
going HIGH to R/W
WP
EW
"A"
"A"
"B"
"B"
DATA
IH
(Refer to Chip Enable Truth Table).
t
DW
IN
t
WR
VALID
t
DH
"B"
MATCH
or SEM
t
9
SWRD
"B"
MATCH
going HIGH.
t
VALID ADDRESS
SPS
t
t
SOP
Read Cycle
SOP
t
SAA
Industrial and Commercial Temperature Ranges
t
t
AOE
ACE
(1,3,4)
DATA
VALID
OUT
4849 drw 10
t
OH
(2)
.
4849 drw 09
.
(1)