70V659S12DRI IDT, 70V659S12DRI Datasheet - Page 7

• Manufacturer Part Number: 70V659S12DRI
• Description: SRAM 128Kx36 STD-PWR 3.3V DUAL-PORT RAM
• Manufacturer: IDT
• Series: IDT70V659/58/57Sr
• Type: Dual Port RAMr

Specifications of 70V659S12DRI

• Memory Size: 4 Mbit
• Organization: 128 K x 36
• Access Time: 12 ns
• Supply Voltage - Max: 3.45 V
• Supply Voltage - Min: 3.15 V
• Maximum Operating Current: 515 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-208
• Interface: LVTTL
• Memory Type: Asynchronous
• Part # Aliases: IDT70V659S12DRI

Truth Table I—Read/Write and Enable Control
NOTES:
1. "H" = V
2. It is possible to read or write any combination of bytes during a given access. A few representative samples have been illustrated here.
Truth Table II – Semaphore Read/Write Control
NOTES:
1. There are eight semaphore flags written to I/O
2. CE = L occurs when CE
3. Each byte is controlled by the respective BEn. To read data BEn = V
IDT70V659/58/57S
High-Speed 3.3V 128/64/32K x 36 Asynchronous Dual-Port Static RAM
OE
X
X
X
X
X
X
X
X
X
X
CE
L
L
L
L
L
L
L
H
H
H
L
(2)
SEM
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
IH,
"L" = V
R/W
↑
X
H
CE
X
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
0
IL,
"X" = Don't Care.
CE
OE
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
L
L
0
1
= V
BE
IL
X
X
H
H
H
H
L
H
L
L
H
H
H
L
H
L
L
L
and CE
3
BE
X
X
L
3
Inputs
BE
X
X
H
H
H
H
H
L
L
H
H
H
H
L
L
L
L
L
1
2
= V
(1)
BE
X
X
IH
L
BE
0
.
X
X
H
H
L
H
H
L
H
L
H
L
H
H
L
H
L
L
2
1
and read from all the I/Os (I/O
BE
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
BE
X
X
0
L
1
R/W
X
X
X
L
L
L
L
L
L
L
H
H
H
H
H
H
H
X
BE
X
L
L
0
I/O
IL
Byte 3
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D
D
D
.
D
D
D
OUT
OUT
OUT
27-35
IN
IN
IN
SEM
7
L
L
L
0
-I/O
I/O
Byte 2
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D
D
D
35
D
D
D
OUT
OUT
OUT
). These eight semaphore flags are addressed by A
18-26
IN
IN
IN
DATA
I/O
______
X
1-35
OUT
Outputs
Byte 1
I/O
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D
D
D
D
D
D
OUT
OUT
OUT
(1,2)
9-17
IN
IN
IN
Industrial and Commercial Temperature Ranges
(1)
DATA
DATA
______
I/O
OUT
0
Byte 0
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
I/O
IN
D
D
D
D
D
D
OUT
OUT
OUT
IN
IN
IN
0-8
Read Data in Semaphore Flag
Not Allowed
Write I/O
Deselected–Power Down
Deselected–Power Down
Read Byte 0 Only
Read Byte 1 Only
Read Byte 2 Only
Read Byte 3 Only
Read Lower 2 Bytes Only
Read Upper 2 Bytes Only
Read All Bytes
Outputs Disabled
All Bytes Deselected
Write to Byte 0 Only
Write to Byte 1 Only
Write to Byte 2 Only
Write to Byte 3 Only
Write to Lower 2 Bytes Only
Write to Upper 2 bytes Only
Write to All Bytes
0
into Semaphore Flag
Mode
MODE
0
-A
2
.
(3)
4869 tbl 03
4869 tbl 02