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70T3589S166BFGI Datasheet(PDF) 7 Page - Integrated Device Technology

Part # 70T3589S166BFGI
Description  HIGH-SPEED 2.5V 256/128/64K x 36 SYNCHRONOUS DUAL-PORT STATIC RAM
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

70T3589S166BFGI Datasheet(HTML) 7 Page - Integrated Device Technology

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6.42
IDT70T3519/99/89S
High-Speed 2.5V 256/128/64K x 36 Dual-Port Synchronous Static RAM
Industrial and Commercial Temperature Ranges
7
NOTES:
1. "H" = VIH, "L" = VIL, "X" = Don't Care.
2. ADS, CNTEN, REPEAT = X.
3. OE and ZZ are asynchronous input signals.
4. 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 I—Read/Write and Enable Control (1,2,3,4)
OE
CLK
CE0
CE1
BE3
BE2
BE1
BE0
R/W
ZZ
Byte 3
I/O27-35
Byte 2
I/O18-26
Byte 1
I/O9-17
Byte 0
I/O0-8
MODE
X
H
X
X
X
X
X
X
L
High-Z
High-Z
High-Z
High-Z
Deselected–Power Down
X
X
L
X
X
X
X
X
L
High-Z
High-Z
High-Z
High-Z
Deselected–Power Down
X
L
H
H
H
H
H
X
L
High-Z
High-Z
High-Z
High-Z
All Bytes Deselected
X
L
H
H
H
H
L
L
L
High-Z
High-Z
High-Z
DIN
Write to Byte 0 Only
X
LH
H
H
LH
L
L
High-Z
High-Z
DIN
High-Z
Write to Byte 1 Only
X
LH
H
L
H
H
L
L
High-Z
DIN
High-Z
High-Z
Write to Byte 2 Only
X
LH
LH
H
H
L
L
DIN
High-Z
High-Z
High-Z
Write to Byte 3 Only
X
L
H
H
H
L
L
L
L
High-Z
High-Z
DIN
DIN
Write to Lower 2 Bytes Only
X
LH
L
L
H
H
L
L
DIN
DIN
High-Z
High-Z
Write to Upper 2 bytes Only
X
L
H
LL
LL
L
L
DIN
DIN
DIN
DIN
Write to All Bytes
L
L
H
H
H
H
L
H
L
High-Z
High-Z
High-Z
DOUT
Read Byte 0 Only
L
LH
H
H
LH
H
L
High-Z
High-Z
DOUT
High-Z
Read Byte 1 Only
L
LH
H
L
H
H
H
L
High-Z
DOUT
High-Z
High-Z
Read Byte 2 Only
L
LH
LH
H
H
H
L
DOUT
High-Z
High-Z
High-Z
Read Byte 3 Only
L
L
H
H
H
L
L
H
L
High-Z
High-Z
DOUT
DOUT
Read Lower 2 Bytes Only
L
LH
L
L
H
H
H
L
DOUT
DOUT
High-Z
High-Z
Read Upper 2 Bytes Only
L
L
H
LL
LL
H
L
DOUT
DOUT
DOUT
DOUT
Read All Bytes
H
X
X
X
X
X
X
X
L
High-Z
High-Z
High-Z
High-Z
Outputs Disabled
X
X
X
X
X
X
X
X
X
H
High-Z
High-Z
High-Z
High-Z
Sleep Mode
5666 tbl 02
Truth Table II—Address Counter Control (1,2)
NOTES:
1. "H" = VIH, "L" = VIL, "X" = Don't Care.
2. Read and write operations are controlled by the appropriate setting of R/W, CE0, CE1, BEn and OE.
3. Outputs configured in flow-through output mode: if outputs are in pipelined mode the data out will be delayed by one cycle.
4. ADS and REPEAT are independent of all other memory control signals including CE0, CE1 and BEn
5. The address counter advances if CNTEN = VIL on the rising edge of CLK, regardless of all other memory control signals including CE0, CE1, BEn.
6. When REPEAT is asserted, the counter will reset to the last valid address loaded via ADS. This value is not set at power-up: a known location should be loaded
via ADS during initialization if desired. Any subsequent ADS access during operations will update the REPEAT address location.
Address
Previous
Internal
Address
Internal
Address
Used
CLK
ADS
CNTEN
REPEAT(6)
I/O(3)
MODE
An
X
An
L(4)
XH
DI/O (n)
External Address Used
XAn
An + 1
H
L(5)
HDI/O(n+1)
Counter Enabled—Internal Address generation
X
An + 1
An + 1
HH
H
DI/O(n+1)
External Address Blocked—Counter disabled (An + 1 reused)
XX
An
XX
L(4)
DI/O(n)
Counter Set to last valid ADS load
5666 tbl 03


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