CD54HC243中文资料具有三态输出的高速 CMOS 逻辑四路总线收发器数据手册TI规格书

描述 Description

The ’HC243 and ’HCT243 silicon-gate CMOS three-state bidirectional noninverting buffers are intended for two-way asynchronous communication between data buses. They have high-drive-current outputs that enable high-speed operation when driving large bus capacitances. These circuits possess the low power dissipation of CMOS circuits and have speeds comparable to low-power Schottky TTL circuits. They can drive 15 LSTTL loads.

The states of the output-enable (OEB\\, OEA) inputs determine both the direction of flow (A to B, B to A), and the three-state mode.

特性 Features

• Typical Propagation Delay (A to B, B to A) of 7ns at VCC = 5V, CL = 15pF, TA = 25°C
• Buffered Inputs
• Standard Outputs . . . 10 LSTTL Loads
• Wide Operating Temperature Range . . . –55°C to 125°C
• Significant Power Reduction Compared to LSTTL Logic ICs
• 2V to 6V Operation
• HCT Types
• Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
• CMOS Input Compatibility, Il 1µA at VOL, VOH

Data sheet acquired from Harris Semiconductor