These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G\) input is at a high logic level.

To ensure the high-impedance state during power up or power down, (G\) should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• Wide Operating Voltage Range of 2 V to 6 V
• High-Current Inverting Outputs Drive up to 15 LSTTL Loads
• Low Power Consumption, 80-µA Max ICC
• ’HC257 ...Typical tpd = 9 ns
• ’HC258 ...Typical tpd = 12 ns
• ±6-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Provides Bus Interface from Multiple Sources in High-Performance Systems

• LM3410-Q1 - 具有内部补偿的 525kHz/1.6MHz、恒流升压和 SEPIC LED 驱动器
• UA7805 - 5V 1.5A 固定正电压稳压器
• CD74HCT74 - 具有设置和复位功能的高速 CMOS 逻辑双路上升沿 D 触发器
• TMS320C5533 - TMS320C553x 定点 DSP
• SN74LVCH16374A - 具有三态输出的 16 位边沿 D 类触发器
• MSP430F6724A - MSP430F673xA、MSP430F672xA 混合信号微控制器
• TM4C1237H6PGE - Tiva C 系列微控制器
• CSD19532KTT - CSD19532KTT
• DAC5688 - 具有集成 PLL 的 16 位 800MSPS 2x-8x 内插双通道数模转换器
• LP2983 - 采用 SOT-23 封装的微功耗 150 mA 电压稳压器，用于输出电压 1.2V