HD74HCT243 - Hitachi Semiconductor

HD74HCT243 Quad. Bus Transceivers (with 3-state outputs)

The HD74HCT242 is an inverting buffer and the HD74HCT243 is a noninverting buffer. Each device has one active high enable (GBA), and one active low enable (GAB). GBA enables the A outputs and GAB enables the B outputs. The device does not have schmitt trigger inputs. Features • • • • • • LSTTL Output Logic Level Compatibility as well as CMOS Output Compatib.

Features

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• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (A to Y) = 9.5 ns typ (C L = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table HD74HCT242 Control Inputs GAB H L H L I O O Z : : : : GBA H H L L Input Output Inverting Output High Impedance Data Port Status A O Z Z I B I Z Z O HD74HCT243 Data Port Status A O Z Z I B I Z Z O HD74HCT242/HD74HCT243 Pin Arrangement GAB NC 1A 2A 3A.