HD74LS640

HD74LS640 Octal Bus Transceivers (inverted 3-state outputs) REJ03D0487–0200 Rev.2.00 Feb.18.2005 This octal bus transceivers is designed for asynchronous two-way communication between data buses. The device transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control (DIR) input. The enable input (G) can be used to disable the device so that the buses are effectively isolated. Features Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74LS640P DILP-20 pin PRDP0020AC-B (DP-20NEV) P HD74LS640FPEL SOP-20 pin (JEITA) PRSP0020DD-B (FP-20DAV) FP Note: Please consult the sales office for the above package availability. Taping Abbreviation (Quantity) — EL (2,000 pcs/reel) Pin Arrangement DIR 1 1A 2 2A 3 3A 4 4A 5 5A 6 6A 7 7A 8 8A 9 GND 10 20 VCC 19 Enable G 18 1B 17 2B 16 3B 15 4B 14 5B 13 6B 12 7B 11 8B (Top view) Function Table Note: Enable G L L H H; h...