These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the ’BCT646 devices.

Output-enable (OE)\ and direction-control (DIR) inputs are provided to control the transceiver functions. In the transceiver mode, data present at the high-impedance port can be stored in either register or in both.

The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The direction control (DIR) determines which bus will receive data when OE\ is low. In the isolation mode (OE\ high), A data can be stored in one register and/or B data can be stored in the other register.

• State-of-the-Art BiCMOS Design Significantly Reduces ICCZ
• Bus Transceivers/Registers
• Independent Registers and Enables for A and B Buses
• Multiplexed Real-Time and Stored Data
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)

• IOL (Max) (mA)
• 48
• IOH (Max) (mA)
• -12
• Technology Family
• BCT
• Rating
• Military
• Operating temperature range (C)
• -55 to 125

SN54BCT646的完整型号有：5962-9155501M3A、5962-9155501MLA、SNJ54BCT646FK、SNJ54BCT646JT，以下是这些产品的关键参数及官网采购报价：

5962-9155501M3A，工作温度：-55 to 125，封装：LCCC (FK)-28，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9155501M3A的批量USD价格：30.859（1000+）

5962-9155501MLA，工作温度：-55 to 125，封装：CDIP (JT)-24，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9155501MLA的批量USD价格：31.474（1000+）

SNJ54BCT646FK，工作温度：-55 to 125，封装：LCCC (FK)-28，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54BCT646FK的批量USD价格：30.859（1000+）

SNJ54BCT646JT，工作温度：-55 to 125，封装：CDIP (JT)-24，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54BCT646JT的批量USD价格：31.474（1000+）