IDT70V28L Integrated Device Technology, IDT70V28L Datasheet - Page 4

• Manufacturer Part Number: IDT70V28L
• Description: High-speed 3.3v 64k X 16 Dual-port Static Ram
• Manufacturer: Integrated Device Technology

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
NOTES:
1. A
2. Refer to Truth Table I - Chip Enable.
NOTES:
1. There are eight semaphore flags written to I/O
2. Refer toTruth Table I -
IDT70V28L
High-Speed 3.3V 64K x 16 Dual-Port Static RAM
CE
CE
0L
H
X
X
H
X
H
X
L
L
L
L
L
L
L
L
(2)
(2)
— A
IH
CE
L
H
and 'L' = V
15L
A
R/W
R/W
0R
X
X
X
X
X
H
H
H
H
H
L
L
L
— A
IL
.
15R
Chip Enable
>V
OE
OE
< 0.2V
X
X
X
X
X
X
X
X
X
L
L
L
H
L
L
CC
CE
V
V
X
X
Inputs
Inputs
(3)
IH
IL
-0.2V
0
.
(1)
(1)
UB
UB
X
X
X
X
X
H
H
H
H
H
L
L
L
L
L
0
and read from all the I/Os (I/O
CC
-0.2V.
>V
<0.2V
CC
LB
LB
X
X
X
X
X
CE
V
H
H
L
L
H
L
L
H
H
L
X
V
0
X
(3)
IH
IL
and CE
-0.2V
1
1
levels; CE is a reference only.
SEM
SEM
X
H
H
H
H
H
H
H
H
L
L
L
L
L
L
Port Selected (TTL Active)
Port Selected (CMOS Active)
Port Deselected (TTL Inactive)
Port Deselected (TTL Inactive)
Port Deselected (CMOS Inactive)
Port Deselected (CMOS Inactive)
0
-I/O
4
15
). These eight semaphore flags are addressed by A
DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA
High-Z
High-Z
High-Z
High-Z
High-Z
I/O
I/O
______
______
8-15
8-15
OUT
OUT
OUT
OUT
IN
IN
IN
IN
Outputs
Outputs
DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA
High-Z
High-Z
High-Z
High-Z
High-Z
I/O
I/O
______
______
Industrial and Commercial Temperature Ranges
0-7
0-7
OUT
OUT
OUT
OUT
IN
IN
IN
IN
Deselected: Power-Down
Both Bytes Deselected
Read Upper Byte Only
Read Lower Byte Only
Read Both Bytes
Outputs Disabled
Read Data in Semaphore Flag
Read Data in Semaphore Flag
Not Allowed
Not Allowed
Write to Upper Byte Only
Write to Lower Byte Only
Write to Both Bytes
Write I/O
Write I/O
Mode
0
0
into Semaphore Flag
into Semaphore Flag
0
-A
Mode
Mode
2
.
4849 tbl 07
4849 tbl 08
4849tbl 06