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 V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• 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)

• Technology Family
• HCT
• Supply voltage (Min) (V)
• 4.5
• Supply voltage (Max) (V)
• 5.5
• Number of channels (#)
• 8
• IOL (Max) (mA)
• 6
• IOH (Max) (mA)
• -6
• ICC (Max) (uA)
• 80
• Input type
• TTL-Compatible CMOS
• Output type
• 3-State
• Features
• Balanced outputs, Very high speed (tpd 5-10ns), Input clamp diode
• Rating
• Catalog

SN74HCT540的完整型号有：SN74HCT540DW、SN74HCT540DWR、SN74HCT540N，以下是这些产品的关键参数及官网采购报价：

SN74HCT540DW，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74HCT540DW的批量USD价格：.381（1000+）

SN74HCT540DWR，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74HCT540DWR的批量USD价格：.163（1000+）

SN74HCT540N，工作温度：-40 to 85，封装：PDIP (N)-20，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网SN74HCT540N的批量USD价格：.244（1000+）

14-24-LOGIC-EVM — 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。