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IDT54FCT521 Datasheet PDF : 6 Pages
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IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names
A0 - A7
B0 - B7
Description
Word A Inputs
Word B Inputs
IA = B
OA = B
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
2604 tbl* 05
FUNCTION TABLE(1)
IA = B
L
L
H
H
INPUTS
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
*A0 = B0, A1 = B1, A2 = B2, etc.
A, B
A = B*
A≠B
A = B*
A≠B
OUTPUT
OA = B
L
H
H
H
2604 tbl* 06
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
Commercial
Military Unit
VTERM(2)
VTERM(3)
Terminal Voltage
with Respect to
GND
Terminal Voltage
with Respect to
GND
–0.5 to +7.0
–0.5 to VCC
–0.5 to +7.0
V
–0.5 to VCC
V
TA
Operating
0 to +70
–55 to +125 °C
Temperature
TBIAS
Temperature
Under Bias
–55 to +125
–65 to +135 °C
TSTG
Storage
–55 to +125
–65 to +150 °C
Temperature
PT
Power
0.5
0.5
W
Dissipation
IOUT
DC Output
120
120
mA
Current
NOTES:
2604 tbl* 01
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. No terminal voltage
may exceed VCC by +0.5V unless otherwise noted.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter(1)
CIN
Input
Capacitance
Conditions Typ. Max. Unit
VIN = 0V
6 10 pF
COUT
Output
Capacitance
VOUT = 0V
8 12 pF
NOTE:
2604 tbl* 02
1. This parameter is measured at characterization but not tested.
7.16
2
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