IDT7028 Integrated Device Technology, IDT7028 Datasheet - Page 10

• Manufacturer Part Number: IDT7028
• Description: 64k X16 Dual-port Ram
• Manufacturer: Integrated Device Technology

AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage Range
NOTES:
1. Port-to-port delay through RAM cells from writing port to reading port, refer to "Timing Waveform of Write with Port-to-Port Read and BUSY (M/S = V
2. To ensure that the earlier of the two ports wins.
3. t
4. To ensure that the write cycle is inhibited on port "B" during contention on port "A".
5. To ensure that a write cycle is completed on port "B" after contention on port "A".
PORT-TO-PORT DELAY TIMING
BUSY TIMING (M/S=V
t
t
t
t
t
t
t
BUSY TIMING (M/S=V
t
t
t
t
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
IDT7028L
High-Speed 64K x 16 Dual-Port Static RAM
Symbol
BDD
is a calculated parameter and is the greater of 0, t
BUSY Access Time from Address Match
BUSY Disable Time from Address Not Matched
BUSY Access Time from Chip Enable Low
BUSY Access Time from Chip Enable High
Arbitration Priority Set-up Time
BUSY Disable to Valid Data
Write Hold After BUSY
BUSY Input to Write
Write Hold After BUSY
Write Pulse to Data Delay
Write Data Valid to Read Data Delay
IH
IL
)
)
(4)
(5)
(5)
(1)
(3)
(2)
(1)
WDD
Parameter
– t
WP
(actual) or t
DDD
10
– t
DW
(actual).
Industrial and Commercial Temperature Ranges
Min.
Com'l Only
____
____
____
____
____
____
____
12
12
5
0
7028L15
Max.
____
____
____
____
15
15
15
15
15
30
25
Min.
Com'l & Ind
____
____
____
____
____
____
____
15
15
5
0
7028L20
Max.
____
____
____
____
20
20
20
17
17
45
30
IH
)".
4836 tbl 14
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns