IDT54FCT574 (3-state) equivalent, fast cmos octal d registers (3-state).
* IDT54/74FCT374/534/574 equivalent to FAST™ speed and drive
* IDT54/74FCT374A/534A/574A up to 30% faster than FAST
* IDT54/74FCT374C/534C/574C up to 50% fas.
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