IDT74FCT640A transceivers equivalent, fast cmos octal bidirectional transceivers.
* IDT54/74FCT245/640/645 equivalent to FAST™ speed and drive
* IDT54/74FCT245A/640A/645A 25% faster than FAST
* IDT54/74FCT245C/640C/645C 40% faster than FAS.
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