74F640 • 74F645 Octal Bus Transceiver with 3-STATE OutputsGeneral Des criptionThese devices are octal bus transceivers designed forasynchronous two-way data flow between the A and B busses.Both busses are capable of sinking 64 mA, have 3-STATE outputs, and a common output enable pin. Thedirection of data flow is determined by the transmit/receive(T/R) input. The 74F645 is a high speed/low power versionof the 74F245. The 74F640 is an inverting option of the74F645.Featuresn Designed for asynchronous two-way data flow betweenbussesn Outputs sink 64 mAn Transmit/receive (T/R) input controls the direction ofdata flown 74F645 is a lower power, faster version of the 74F245n 74F640 is an inverting option of the 74F645
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