IDT7024 데이터 시트보기 (PDF) - Integrated Device Technology
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IDT7024 Datasheet PDF : 22 Pages
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IDT7024S/L
High-Speed 4K x 16 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Truth Table I: Non-Contention Read/Write Control
Inputs(1)
Outputs
CE
R/W
OE
UB
LB
SEM
I/O8-15
I/O0-7
Mode
H
X
X
X
X
H
High-Z
High-Z Deselcted: Power-Down
X
X
X
H
H
H
High-Z
High-Z Both Bytes Deselected
L
L
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
L
L
H
DATAIN
DATAIN Write to Both Bytes
L
H
L
L
H
H
DATAOUT
High-Z Read Upper Byte Only
L
H
L
H
L
H
High-Z
DATAOUT Read Lower Byte Only
L
H
L
L
L
H
DATAOUT
DATAOUT Read Both Bytes
X
X
H
X
X
X
High-Z
High-Z Outputs Disabled
NOTE:
1. A0L — A11L ≠ A0R — A11R
2740 tbl 03
Truth Table II: Semaphore Read/Write Control(1)
Inputs(1)
Outputs
CE(2)
R/W
OE
UB
LB
SEM
I/O8-15
I/O0-7
Mode
H
H
L
X
X
L
DATAOUT
DATAOUT Read Semaphore Flag Data Out
X
H
L
H
H
L
DATAOUT
DATAOUT Read Semaphore Flag Data Out
H
↑
X
X
X
L
DATAIN
DATAIN Write I/O0 into Semaphore Flag
X
↑
X
H
H
L
DATAIN
DATAIN Write I/O0 into Semaphore Flag
L
X
X
L
X
L
____
____
Not Allowed
L
X
X
X
L
L
____
____
Not Allowed
NOTE:
1. There are eight semaphore flags written to via I/O0 and read from all of the I/O's (I/O0 - I/O15).
These eight semaphores are addressed by A0 - A2.
2740 tbl 04
Absolute Maximum Ratings(1)
Symbol
Rating
VTERM(2)
Terminal Voltage
with Respect
to GND
Commercial
& Industrial
-0.5 to +7.0
Military
Unit
-0.5 to +7.0 V
TBIAS
Te mpe rature
Under Bias
-55 to +125 -65 to +135 oC
TSTG
Storage
Te mpe rature
-65 to +150 -65 to +150 oC
IOUT
DC Output
Current
50
50
mA
NOTES:
2740 tbl 05
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS
may cause permanent damage to the device. This is a stress rating only
and functional operation of the device at these or any other conditions above
those indicated in the operational sections of this specification is not implied.
Exposure to absolute maximum rating conditions for extended periods may
affect reliability.
2. VTERM must not exceed Vcc +10% for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period over VTERM > Vcc + 10%.
Recommended DC Operating
Conditions
Symbol
Parameter
Min. Typ. Max. Unit
VCC Supply Voltage
4.5 5.0 5.5 V
GND Ground
0
0
0V
VIH Input High Voltage
2.2
____
6.0(2)
V
VIL Input Low Voltage
-0.5(1)
____
0.8
V
NOTES:
1. VIL > -1.5V for pulse width less than 10ns.
2. VTERM must not exceed Vcc + 10%.
2740 tbl 06
6.442
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