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IDT7038L Datasheet(PDF) 4 Page - Integrated Device Technology

Part # IDT7038L
Description  HIGH - SPEED 64K x 18 DUAL - PORT STATIC RAM
Download  17 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT7038L Datasheet(HTML) 4 Page - Integrated Device Technology

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IDT7038L
High-Speed 64K x 18 Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Truth Table I: Chip Enable(1,2)
Truth Table II: Non-Contention Read/Write Control
NOTES:
1. A0L – A15L
≠ A0R – A15R.
2. Refer to Chip Enable Truth Table.
Truth Table III: Semaphore Read/Write Control(1)
NOTES:
1. There are eight semaphore flags written to via I/O0 and read from all the I/Os (I/O0-I/O17). These eight semaphore flags are addressed by A0-A2.
2. Refer to Chip Enable Truth Table.
NOTES:
1. Chip Enable references are shown above with the actual
CE0 and CE1 levels, CE is a reference only.
2. 'H' = VIH and 'L' = VIL.
3. CMOS standby requires 'X' to be either < 0.2V or > VCC - 0.2V.
CE
CE0
CE1
Mode
L
VIL
VIH
Port Selected (TTL Active)
< 0.2V
>VCC -0.2V
Port Selected (CMOS Active)
H
VIH
X
Port Deselected (TTL Inactive)
XVIL
Port Deselected (TTL Inactive)
>VCC -0.2V
X
Port Deselected (CMOS Inactive)
X<0.2V
Port Deselected (CMOS Inactive)
4837 tbl 06
Inputs
(1)
Outputs
Mode
CE(2)
R/
W
OE
UB
LB
SEM
I/O9-17
I/O0-8
H
X
X
X
X
H
High-Z
High-Z
Deselected: Power-Down
X
X
X
H
H
H
High-Z
High-Z
Both Bytes Deselected
LL
X
L
H
H
DATAIN
High-Z
Write to Upper Byte Only
L
L
X
H
L
H
High-Z
DATAIN
Write to Lower Byte Only
L
L
X
LLH
DATAIN
DATAIN
Write to Both Bytes
LH
L
L
H
H
DATAOUT
High-Z
Read Upper Byte Only
L
H
LH
LH
High-Z
DATAOUT
Read Lower Byte Only
L
H
L
LLH
DATAOUT
DATAOUT
Read Both Bytes
X
X
H
X
X
X
High-Z
High-Z
Outputs Disabled
4837 drw 07
Inputs
(1)
Outputs
Mode
CE(2)
R/
W
OE
UB
LB
SEM
I/O9-17
I/O0-8
HH
L
X
X
L
DATAOUT
DATAOUT
Read Data in Semaphore Flag
XH
L
H
H
L
DATAOUT
DATAOUT
Read Data in Semaphore Flag
H
XXX
L
DATAIN
DATAIN
Write I/O0 into Semaphore Flag
X
XH
H
L
DATAIN
DATAIN
Write I/O0 into Semaphore Flag
L
X
XL
XL
______
______
Not Allowed
L
XXX
L
L
______
______
Not Allowed
4837 tbl 08


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