IDT7009 Integrated Device Technology, IDT7009 Datasheet - Page 4

• Manufacturer Part Number: IDT7009
• Description: High-speed 128k X 8 Dual-port Static Ram
• Manufacturer: Integrated Device Technology

Truth Table I: Chip Enable
NOTES:
1. Chip Enable references are shown above with the actual CE
2. 'H' = V
3. CMOS standby requires 'X' to be either < 0.2V or > V
Truth Table II: Non-Contention Read/Write Control
NOTES:
1. A
2. Refer to Chip Enable Truth Table.
Truth Table III: Semaphore Read/Write Control
NOTES:
1. There are eight semaphore flags written to via I/O
2. Refer to Chip Enable Truth Table.
CE
CE
IDT7009L
High-Speed 128K x 8 Dual-Port Static RAM
CE
X
H
L
L
H
H
L
L
H
(2)
(2)
0L
– A
IH
16L
R/W
R/W
↑
H
X
and 'L' = V
X
H
X
L
>V
Inputs
≠ A
Inputs
< 0.2V
CC
CE
V
V
0R
X
X
IL
IH
-0.2V
0
OE
(1)
– A
X
X
L
OE
X
X
H
IL
L
.
16R.
SEM
L
L
L
SEM
X
H
H
H
>V
<0.2V
CC
CE
V
V
X
X
DATA
Outputs
IH
IL
DATA
-0.2V
I/O
1
______
DATA
Outputs
DATA
High-Z
High-Z
I/O
0-7
OUT
IN
0-7
OUT
IN
Port Selected (TTL Active)
Port Selected (CMOS Active)
Port Deselected (TTL Inactive)
Port Deselected (TTL Inactive)
Port Deselected (CMOS Inactive)
Port Deselected (CMOS Inactive)
Read Semaphore Flag Data Out
Not Allowed
Write I/O
0
Deselected: Power-Down
Read memory
Outputs Disabled
Write to memory
and read from all the I/Os (I/O
CC
(1,2)
- 0.2V.
0
into Semaphore Flag
0
and CE
1
levels, CE is a reference only.
4
0
-I/O
7
). These eight semaphore flags are addressed by A
Industrial and Commercial Temperature Ranges
Mode
Mode
(1)
Mode
0
-A
2
.
4839 drw 07
4839 tbl 08
4839 tbl 06