The 'BCT543 octal transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable (LEAB\ or LEBA\) and output-enable (OEAB\ or OEBA\) inputs are provided for each register to permit independent control in either direction of data flow.

The A-to-B enable (CEAB\) input must be low in order to enter data from A or to output data from B. If CEAB\ is low and LEAB\ is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB\ puts the A latches in the storage mode. With CEAB\ and OEAB\ both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar but requires using the CEBA\, LEBA\, and OEBA\ inputs.

The SN54BCT543 is characterized for operation over the full military temperature range of \x9655°C to 125°C. The SN74BCT543 is characterized for operation from 0°C to 70°C.

• State-of-the-Art BiCMOS Design Significantly Reduces ICCZ
• 3-State True Outputs
• Back-to-Back Registers for Storage
• ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015
• Package Options Include Plastic Small-Outline Packages (DW), Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (JT, NT)

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

SN54BCT543的完整型号有：5962-9087001M3A、SNJ54BCT543FK、SNJ54BCT543JT，以下是这些产品的关键参数及官网采购报价：

5962-9087001M3A，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5962-9087001M3A的批量USD价格：40.44（1000+）

SNJ54BCT543FK，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SNJ54BCT543FK的批量USD价格：40.44（1000+）

SNJ54BCT543JT，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SNJ54BCT543JT的批量USD价格：23.834（1000+）