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74643 Octal 3-State Bus Transceiver
VCC G 61 82 83 64 85 86 87 88
DIR Al A2 A3 A4 AS A6 A7 A8 GNO
0 74LS643-1, 74ALS643-1 Ii Iol 48mA 0 74ALS1643-1 li Iol 24mA
FUNCTION TABLE J«B