IDT7025S/L
HIGH-SPEED 8K x 16 DUAL-PORT STATIC RAM
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TRUTH TABLE I – NON-CONTENTION READ/WRITE CONTROL
Inputs(1)
Outputs
CE
R/W
X
OE UB
LB
X
H
H
L
SEM
H
I/O8-15
I/O0-7
Mode
H
X
X
X
X
X
L
X
H
L
High-Z
High-Z
DATAIN
High-Z
High-Z Deselected: Power Down
High-Z Both Bytes Deselected
High-Z Write to Upper Byte Only
DATAIN Write to Lower Byte Only
X
X
H
L
L
H
L
L
H
L
H
L
L
L
H
DATAIN DATAIN Write to Both Bytes
DATAOUT High-Z Read Upper Byte Only
High-Z DATAOUT Read Lower Byte Only
DATAOUT DATAOUT Read Both Bytes
L
H
H
H
X
L
H
L
H
L
L
L
H
L
H
L
L
H
X
H
X
X
X
High-Z
High-Z Outputs Disabled
NOTE:
2683 tbl 03
1. A0L — A12L are not equal to A0R — A12R.
TRUTH TABLE II – SEMAPHORE READ/WRITE CONTROL(1)
Inputs
Outputs
CE
R/W
H
OE
UB
X
LB
X
SEM
I/O8-15
I/O0-7
Mode
H
L
L
L
L
L
L
L
L
DATAOUT DATAOUT Read Semaphore Flag Data Out
DATAOUT DATAOUT Read Semaphore Flag Data Out
DATAIN DATAIN Write I/O0 into Semaphore Flag
DATAIN DATAIN Write I/O0 into Semaphore Flag
X
H
H
X
H
X
H
X
X
X
X
X
H
L
H
X
L
L
X
X
—
—
—
—
Not Allowed
Not Allowed
X
L
NOTE:
2683 tbl 04
1. There are eight semaphore flags written to via I/O0 and read from I/O0 - I/O15. These eight semaphores are addressed by A0 - A2.
ABSOLUTE MAXIMUM RATINGS(1)
RECOMMENDED DC OPERATING
CONDITIONS
Symbol
Rating
Commercial
Military
Unit
Symbol
Parameter
Supply Voltage
Supply Voltage
Min. Typ. Max. Unit
(2)
VTERM
Terminal Voltage –0.5 to +7.0 –0.5 to +7.0
with Respect
to GND
V
VCC
4.5
0
5.0
0
5.5
0
V
V
V
V
GND
6.0(2)
TA
Operating
0 to +70
–55 to +125 °C
VIH
VIL
Input High Voltage
Input Low Voltage
2.2
–0.5(1)
—
—
Temperature
0.8
TBIAS
TSTG
IOUT
Temperature
Under Bias
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
NOTES:
2683 tbl 06
1. VIL > -1.5V for pulse width less than 10ns.
2. VTERM must not exceed Vcc + 0.5V.
Storage
Temperature
DC Output
Current
50
50
mA
CAPACITANCE(1)
(TA = +25°C, f = 1.0MHz)TQFP ONLY
NOTES:
2683 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.
Symbol
CIN
Parameter
Conditions(2) Max. Unit
Input Capacitance
VIN = 3dV
9
pF
pF
COUT
Output
VOUT = 3dV
10
Capacitance
2. VTERM must not exceed Vcc + 0.5V for more than 25% of the cycle time
or 10ns maximum, and is limited to < 20 mA for the period over VTERM
> Vcc + 0.5V.
NOTES:
2683 tbl 07
1. This parameter is determined by device characterization but is not
production tested.
2. 3dV references the interpolated capacitance when the input and output
signals switch from 0V to 3V or from 3V to 0V.
6.16
4
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
