IDT70V3389S Integrated Device Technology, IDT70V3389S Datasheet - Page 5

• Manufacturer Part Number: IDT70V3389S
• Description: High-speed 3.3v 64k X 18 Synchronous Pipelined Dual-port Static Ram With 3.3v Or 2.5v Interface
• Manufacturer: Integrated Device Technology

NOTES:
1. "H" = V
2. ADS, CNTEN, CNTRST = V
3. OE is an asynchronous input signal.
R/W
I/O
CLK
UB
CE
OE
A
ADS
CNTEN
CNTRST
IDT70V3389S
High-Speed 64K x 18 Dual-Port Synchronous Pipelined Static RAM
0L
OE
0L
L
0L
L
X
X
X
X
L
L
L
H
L
- A
L
L
- LB
,
Left Port
- I/O
CE
V
15L
OPT
L
DDQL
L
L
1L
17L
IH,
L
CLK
"L" = V
V
V
DD
SS
IL,
R/W
I/O
CLK
UB
CE
OE
A
ADS
CNTEN
CNTRST
CE
"X" = Don't Care.
0R
L
L
L
L
L
L
L
L
0R
0R
R
R
R
R
Right Port
- A
R
0
- LB
,
- I/O
CE
V
OPT
15R
R
DDQR
R
R
1R
17R
IH
R
CE
.
H
H
H
H
H
H
H
H
1
Chip Enables
Read/Write Enable
Output Enable
Data Input/Output
Clock
Counter Enable
Counter Reset
Byte Enables (9-bit bytes)
Power (I/O Bus) (3.3V or 2.5V)
Option for selecting V
Power (3.3V)
Ground (0V)
Address
Address Strobe Enable
UB
H
H
L
L
H
L
L
L
LB
H
H
H
L
L
L
L
L
(1)
Names
R/W
DDQX
X
H
H
H
X
L
L
L
(1,2)
4832 tbl 01
Upper Byte
(1)
High-Z
High-Z
High-Z
High-Z
I/O
D
D
D
D
OUT
OUT
9-18
IN
IN
6.42
5
NOTES:
1. V
2. OPT
Lower Byte
applying inputs on the I/Os and controls for that port.
If OPT
levels and V
port's I/Os and controls will operate at 2.5V levels and V
at 2.5V. The OPT pins are independent of one another—both ports can operate
at 3.3V levels, both can operate at 2.5V levels, or either can operate at 3.3V
with the other at 2.5V.
DD
High-Z
High-Z
High-Z
High-Z
I/O
D
D
, OPT
X
D
D
OUT
OUT
IN
IN
selects the operating voltage levels for the I/Os and controls on that port.
X
0-8
is set to VIH (3.3V), then that port's I/Os and controls will operate at 3.3V
X
, and V
DDQX
Read Lower Byte Only
Read Upper Byte Only
Read Both Bytes
Outputs Disabled
All Bytes Deselected
Write to Lower Byte Only
Write to Upper Byte Only
Write to Both Bytes
Industrial and Commercial Temperature Ranges
must be supplied at 3.3V. If OPT
DDQX
must be set to appropriate operating levels prior to
MODE
X
is set to VIL (0V), then that
DDQX
must be supplied
4832 tbl 02