IDT74FCT521 General Description
DESCRIPTION:
The IDT54/74FCT521/A/B/C are 8-bit identity comparators built using an advanced dual metal CMOS technology. These
devices compare two words of up to eight bits each and provide a LOW output when the two words match bit for bit.
The expansion input IA = B also serves as an active LOW enable input.
IDT74FCT521 Maximum Ratings
Symbol Rating Commercial Military Unit
VTERM(2)
Terminal Voltagewith Respect to
GND 0.5 to +7.0 0.5 to +7.0 V
VTERM(3)
Terminal Voltagewith Respect to
GND 0.5 to VCC 0.5 to VCC V
TA OperatingTemperature
0 to +70 55 to +125 °C
TBIAS Temperature.Under Bias
55 to +125 65 to +135 °C
TSTG StorageTemperature
55 to +125 65 to +150 °C
PT Power Dissipation0.5 0.5 W IOUT DC Output
Current 120 120 mA
IDT74FCT521 Features
• IDT54/74FCT521 equivalent to FASTTM speed
• IDT54/74FCT521A 35% faster than FAST
• IDT54/74FCT521B 50% faster than FAST
• IDT54/74FCT521C 60% faster than FAST
• Equivalent to FAST output drive over full temperature
and voltage supply extremes
•IOL = 48mA (commercial), and 32mA (military)
• CMOS power levels (1mW typ. static)
• TTL input and output level compatible
• CMOS output level compatible
• Substantially lower input current levels than FAST
(5µA max.)
IDT74FCT521 Connection Diagram
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