参数资料
型号: IDT70T651S12BF
厂商: IDT, Integrated Device Technology Inc
文件页数: 7/27页
文件大小: 0K
描述: IC SRAM 9MBIT 12NS 208FBGA
标准包装: 7
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 9M(256K x 36)
速度: 12ns
接口: 并联
电源电压: 2.4 V ~ 2.6 V
工作温度: 0°C ~ 70°C
封装/外壳: 208-LFBGA
供应商设备封装: 208-CABGA(15x15)
包装: 托盘
其它名称: 70T651S12BF
IDT70T651/9S
High-Speed 2.5V 256/128K x 36 Asynchronous Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Truth Table I—Read/Write and Enable Control (1,2)
Byte 3
Byte 2
Byte 1
Byte 0
OE
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
H
X
SEM
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
CE 0
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
CE 1
X
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
BE 3
X
X
H
H
H
H
L
H
L
L
H
H
H
L
H
L
L
L
X
BE 2
X
X
H
H
H
L
H
H
L
L
H
H
L
H
H
L
L
L
X
BE 1
X
X
H
H
L
H
H
L
H
L
H
L
H
H
L
H
L
L
X
BE 0
X
X
H
L
H
H
H
L
H
L
L
H
H
H
L
H
L
L
X
R/ W
X
X
X
L
L
L
L
L
L
L
H
H
H
H
H
H
H
X
X
ZZ
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
I/O 27-35
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
D IN
High-Z
D IN
D IN
High-Z
High-Z
High-Z
D OUT
High-Z
D OUT
D OUT
High-Z
High-Z
I/O 18-26
High-Z
High-Z
High-Z
High-Z
High-Z
D IN
High-Z
High-Z
D IN
D IN
High-Z
High-Z
D OUT
High-Z
High-Z
D OUT
D OUT
High-Z
High-Z
I/O 9-17
High-Z
High-Z
High-Z
High-Z
D IN
High-Z
High-Z
D IN
High-Z
D IN
High-Z
D OUT
High-Z
High-Z
D OUT
High-Z
D OUT
High-Z
High-Z
I/O 0-8
High-Z
High-Z
High-Z
D IN
High-Z
High-Z
High-Z
D IN
High-Z
D IN
D OUT
High-Z
High-Z
High-Z
D OUT
High-Z
D OUT
High-Z
High-Z
MODE
Deselected–Power Down
Deselected–Power Down
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
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
High-Z Sleep Mode
NOTES:
1. "H" = V IH, "L" = V IL, "X" = Don't Care.
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 (1)
5632 tbl 02
Inputs (1)
Outputs
CE (2)
H
H
L
R/ W
H
X
OE
L
X
X
BE 3
L
X
X
BE 2
L
X
X
BE 1
L
X
X
BE 0
L
L
X
SEM
L
L
L
I/O 1-35
DATA OUT
X
______
I/O 0
DATA OUT
DATA IN
______
Mode
Read Data in Semaphore Flag (3)
Write I/O 0 into Semaphore Flag
Not Allowed
NOTES:
1. There are eight semaphore flags written to I/O 0 and read from all the I/Os (I/O 0 -I/O 35 ). These eight semaphore flags are addressed by A 0 -A 2 .
2. CE = L occurs when CE 0 = V IL and CE 1 = V IH . CE = H when CE 0 = V IH and/or CE 1 = V IL .
3. Each byte is controlled by the respective BE n. To read data BE n = V IL .
7
5632 tbl 03
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