IDT70261S Integrated Device Technology, IDT70261S Datasheet - Page 11

• Manufacturer Part Number: IDT70261S
• Description: High-speed 16k X 16 Dual-port Static Ram With Interrupt
• Manufacturer: Integrated Device Technology

NOTES:
1. Port-to-port delay through RAM cells from writing port to reading port, refer to "Timing Wave form 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".
6. 'X' in part numbers indicates power rating (S or L).
PORT-TO-PORT DELAY TIMING
BUSY
t
t
t
t
t
t
t
BUSY
t
t
t
t
PORT-TO-PORT DELAY TIMING
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
BUSY
t
t
t
t
t
t
t
BUSY
t
t
t
t
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
IDT70261S/L
High-Speed 16K x 16 Dual-Port Static RAM with Interrupt
Symbol
BDD
Symbol
TIMING (M/
TIMING (M/
TIMING (M/
TIMING (M/
is a calculated parameter and is the greater of 0, t
BUSY
BUSY
BUSY
BUSY
Arbitration Priority Set-up Time
BUSY
Write Hold After
BUSY
Write Hold After
Write Pulse to Data Delay
Write Data Valid to Read Data Delay
BUSY
BUSY
BUSY
BUSY
Arbitration Priority Set-up Time
BUSY
Write Hold After
BUSY
Write Hold After
Write Pulse to Data Delay
Write Data Valid to Read Data Delay
S
S
S
S
=V
=V
=V
=V
IH
Access Time from Address Match
Disable Time from Address Not Matched
Acce ss Time from Chip Enable Low
Acce ss Time from Chip Enable High
Disable to Valid Data
IL
Input to Write
IH
Access Time from Address Match
Disable Time from Address Not Matched
Acce ss Time from Chip Enable Low
Acce ss Time from Chip Enable High
Disable to Valid Data
IL
Input to Write
)
)
)
)
BUSY
BUSY
BUSY
BUSY
(4)
(4)
(5)
(5)
(5)
(5)
(1)
(1)
(3)
Parameter
(3)
(2)
(2)
(1)
(1)
WDD
Parameter
– t
WP
(actual), or t
6.42
DDD
11
– t
DW
(actual).
Min.
____
____
____
____
____
____
____
12
12
Com'l Only
5
0
70261X15
Max.
Industrial and Commercial Temperature Ranges
____
____
____
____
30
25
15
15
15
15
18
Min.
Min.
____
____
____
____
____
____
____
15
15
____
____
____
____
____
____
____
Com'l & Ind
25
25
5
0
Com'l & Ind
5
0
70261X20
70261X35
Max.
Max.
____
____
____
____
20
20
20
30
45
30
17
____
____
____
____
20
20
20
20
35
60
45
Min.
Min.
____
____
____
____
____
____
____
Com'l & Ind
17
17
____
____
____
____
____
____
____
25
25
5
0
Com'l & Ind
5
0
70261X25
70261X55
Max.
Max.
____
____
____
____
20
20
20
30
50
35
17
____
____
____
____
45
40
40
35
40
80
65
IH
3039 tbl 14a
3039 tbl 14b
)".
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns