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IDT7019L Datasheet(PDF) 4 Page - Integrated Device Technology

Part # IDT7019L
Description  HIGH-SPEED 128K x 9 DUAL-PORT STATIC RAM
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT7019L Datasheet(HTML) 4 Page - Integrated Device Technology

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4
IDT7019L
High-Speed 128K x 9 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 – A16L
≠ A0R – A16R.
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/O8). 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)
4840 tbl 06
Inputs(1)
Outputs
Mode
CE(2)
R/W
OE
SEM
I/O0-8
H
X
X
H
High-Z
Deselected: Power-Down
LL
X
H
DATAIN
Write to memory
LH
L
H
DATAOUT
Read memory
X
X
H
X
High-Z
Outputs Disabled
4840 drw 07
Inputs
Outputs
Mode
CE(2)
R/W
OE
SEM
I/O0-8
HH
L
L
DATAOUT Read Semaphore Flag Data Out
H
XL
DATAIN
Write I/O0 into Semaphore Flag
LXX
L
______
Not Allowed
4840 tbl 08


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