The ´BCT640 bus transceiver is designed for asynchronous communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so that the buses are effectively isolated.

The SN54BCT640 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74BCT640 is characterized for operation from 0°C to 70°C.

• State-of-the-Art BiCMOS Design Substantially Reduces Standby Current
• Outputs Have Undershoot-Protection Circuitry
• Power-Up High-Impedance State
• Buffered Control Inputs to Reduce DC Loading Effects
• ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015
• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (J, N)

• IOL (Max) (mA)
• 64
• IOH (Max) (mA)
• -15
• Technology Family
• BCT
• Rating
• Catalog
• Operating temperature range (C)
• 0 to 70

SN74BCT640的完整型号有：SN74BCT640DW、SN74BCT640N、SN74BCT640NSR，以下是这些产品的关键参数及官网采购报价：

SN74BCT640DW，工作温度：0 to 70，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SN74BCT640DW的批量USD价格：1.848（1000+）

SN74BCT640N，工作温度：0 to 70，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SN74BCT640N的批量USD价格：2.125（1000+）

SN74BCT640NSR，工作温度：0 to 70，封装：SO (NS)-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SN74BCT640NSR的批量USD价格：2.033（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。