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SN74HCT540DWR_TI(德州仪器)中文资料_英文资料_价格_PDF手册

2024/6/25 9:50:56

220

SN74HCT540DWR

具有 TTL 兼容型 CMOS 输入和三态输出的 8 通道、4.5V 至 5.5V 反相器

 


 

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· Operating Voltage Range of 4.5 V to 5.5 V

· Low Power Consumption, 80-µA Max ICC

· Typical tpd = 12 ns

· ±6-mA Output Drive at 5 V

· Low Input Current of 1 µA Max

· Inputs Are TTL-Voltage Compatible

· High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads

· Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)

 

 

                                                                    


 

 

description/ordering information

 

These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.

 

The 3-state control gate is a 2-input NOR. If either output-enable (OE1 or OE2) input is high, all eight outputs are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.

 

To ensure the high-impedance state during power up or power down, OE 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.