
6.12
12
IDT7015S/L
HIGH-SPEED 8K x 9 DUAL-PORT STATIC RAM
AC ELECTRICAL CHARACTERISTICS OVER THE
OPERATING TEMPERATURE AND SUPPLY VOLTAGE RANGE
(6)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT7015X12 IDT7015X15 IDT7015X17
Com'l. Only Com'l. Only Com'l. Only
Min. Max. Min. Max Min Max.
Symbol
BUSY TIMING (M/
S
= V
IH
)
t
BAA
BUSY
Access Time from Address Match
t
BDA
BUSY
Disable Time from Address Not Matched — 12 — 15 — 17
t
BAC
BUSY
Access Time from Chip Enable Low — 12 — 15 — 17
t
BDC
BUSY
Disable Time from Chip Enable High — 12 — 15 — 17
t
APS
Arbitration Priority Set-up Time
(2)
5 — 5 — 5 —
t
BDD
BUSY
Disable to Valid Data
(3)
— 15 — 18 — 18
t
WH
Write Hold After
BUSY
(5)
11 — 13 — 13 —
BUSY TIMING (M/
S
= V
IL
)
t
WB
BUSY
Input to Write
(4)
0 — 0 — 0 —
Write Hold After
BUSY
(5)
11 — 13 — 13 —
PORT-TO-PORT DELAY TIMING
Write Pulse to Data Delay
(1)
— 25 — 30 — 30
Write Data Valid to Read Data Delay
(1)
Parameter
Unit
— 12 — 15 — 17
ns
ns
ns
ns
ns
ns
ns
ns
t
WH
ns
t
WDD
ns
t
DDD
— 20 — 25 — 25
ns
IDT7015X20
IDT7015X25
IDT7015X35
Symbol
BUSY TIMING (M/
S
= V
IH
)
t
BAA
BUSY
Access Time from Address Match
t
BDA
BUSY
Disable Time from Address Not Matched
t
BAC
BUSY
Access Time from Chip Enable Low
t
BDC
BUSY
Disable Time from Chip Enable High
t
APS
Arbitration Priority Set-up Time
(2)
BUSY
Disable to Valid Data
(3)
t
WH
Write Hold After
BUSY
(5)
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
—
—
—
—
5
20
20
20
17
—
—
—
—
—
5
20
20
20
17
—
—
—
—
—
5
20
20
20
20
—
ns
ns
ns
ns
ns
t
BDD
—
15
30
—
—
17
30
—
—
25
35
—
ns
ns
BUSY TIMING (M/
S
= V
IL
)
BUSY
Input to Write
(4)
Write Hold After
BUSY
(5)
t
WB
0
—
0
—
0
—
ns
t
WH
15
—
17
—
25
—
ns
PORT-TO-PORT DELAY TIMING
Write Pulse to Data Delay
(1)
Write Data Valid to Read Data Delay
(1)
t
WDD
—
45
—
50
—
60
ns
t
DDD
—
30
—
35
—
45
ns
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
IH
)".
2. To ensure that the earlier of the two ports wins.
3. t
BDD
is a calculated parameter and is the greater of 0, t
WDD
– t
WP
(actual), or t
DDD
– t
DW
(actual).
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).
2940 tbl 13