Octal Bus Transceivers (with 3-state Outputs) - Hitachi Semiconductor

Both the HD74HCT640 and the HD74HCT643 have one active low enable input (G), and a direction control (DIR). When the DIR input is high, data flows from the A inputs to the B outputs. When DIR is low, data flows from B to A. The HD74HCT640 transfers inverted data from one bus to the other. The HD74HCT643 transfers inverted data from the A bus to the B bus and non-inverted data from the B bus to the A bus. By Renesas Technology
HD74HCT643 's PackagesHD74HCT643 's pdf datasheet

HD74HCT643 Pinout, Pinouts
HD74HCT643 pinout,Pin out
This is one package pinout of HD74HCT643,If you need more pinouts please download HD74HCT643's pdf datasheet.

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