
IDT70261S/L
High-Speed 16K x 16 Dual-Port Static RAM with Interrupt
Maximum Operating Temperature
and Supply Voltage (1,2)
Industrial and Commercial Temperature Ranges
Recommended DC Operating
Conditions
Ambient
Symbol
Parameter
Min.
Typ.
Max.
Unit
Grade
Temperature
GND
Vcc
V CC
Supply Voltage
4.5
5.0
5.5
V
6.0
Commercial
Industrial
0 O C to +70 O C
-40 O C to +85 O C
0V
0V
5.0V + 10%
5.0V + 10%
GND
V IH
Ground
Input High Voltage
0
2.2
0
____
0
(2)
V
V
-0.5
NOTES:
1. This is the parameter TA. This is the "instant on"case temperature.
3039 tbl 02
V IL
Input Low Voltage
(1)
____
0.8
V
NOTES:
1. V IL > -1.5V for pulse width less than 10ns.
2. V TERM must not exceed Vcc + 10%.
Truth Table I – Non-Contention Read/Write Control
3039 tbl 03
Inputs (1)
Outputs
CE
H
X
L
L
L
L
L
L
X
R/ W
X
X
L
L
L
H
H
H
X
OE
X
X
X
X
X
L
L
L
H
UB
X
H
L
H
L
L
H
L
X
LB
X
H
H
L
L
H
L
L
X
SEM
H
H
H
H
H
H
H
H
X
I/O 8-15
High-Z
High-Z
DATA IN
High-Z
DATA IN
DATA OUT
High-Z
DATA OUT
High-Z
I/O 0-7
High-Z
High-Z
High-Z
DATA IN
DATA IN
High-Z
DATA OUT
DATA OUT
High-Z
Mode
Deselected: Power-Down
Both Bytes Deselected
Write to Upper Byte Only
Write to Lower Byte Only
Write to Both Bytes
Read Upper Byte Only
Read Lower Byte Only
Read Both Bytes
Outputs Disabled
3039 tbl 04
NOTE:
1. A 0L — A 13L ≠ A 0R — A 13R.
Truth Table II – Semaphore Read/Write Control (1)
Inputs
Outputs
CE
H
X
H
X
L
L
R/ W
H
H
↑
↑
X
X
OE
L
L
X
X
X
X
UB
X
H
X
H
L
X
LB
X
H
X
H
X
L
SEM
L
L
L
L
L
L
I/O 8-15
DATA OUT
DATA OUT
DATA IN
DATA IN
______
______
I/O 0-7
DATA OUT
DATA OUT
DATA IN
DATA IN
______
______
Mode
Read Data in Semaphore Flag
Read Data in Semaphore Flag
Write I/O 0 into Semaphore Flag
Write I/O 0 into Semaphore Flag
Not Allowed
Not Allowed
NOTE:
1. There are eight semaphore flags written to via I/O 0 and read from all I/O's(I/O 0 - I/O 15 ). These eight semaphores are addressed by A 0 - A 2 .
3
6.42
3039 tbl 05