HD74HC244 - Hitachi Semiconductor

HD74HC244 Octal Buffers/Line Drivers/Line Receivers(with noninverted 3-state outputs)

The HD74HC244 is a non-inverting buffer and has two active low enables (1G and 2G ). Each enable independently controls 4 buffers. This device does not have schmitt trigger inputs. Features • • • • • High Speed Operation: tpd = 11 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA.

Features

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• High Speed Operation: tpd = 11 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs G H L L A X H L Output Y Z H L Notes H: high level L: low level X: irrelevant Z: off (high-impedance) state of a 3-state output HD74HC244 Pin Arrangement 1G1 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 1 2 3 4 5 6 7 8 9 20 VCC 19 2G 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 (Top view) GND 10 Absolute Maximum Ratings Item Suppl.