The CY74FCT2543T octal latched transceiver contains two sets of eight D-type latches. Separate latch enable (LEAB\, LEBA\) and output enable (OEAB\, OEBA\) inputs permit each latch set to have independent control of inputting and outputting in either direction of data flow. For example, for data flow from A to B, the A-to-B enable (CEAB\) input must be low to enter data from A or to take data from B, as indicated in the function table. With CEAB\ low, a low signal on the A-to-B latch enable (LEAB\) input makes the A-to-B latches transparent; a subsequent low-to-high transition of LEAB\ puts the A latches in the storage mode and their outputs no longer change with the A inputs. With CEAB\ and OEAB\ both low, the 3-state B output buffers are active and reflect data present at the output of the A latches. Control of data from B to A is similar, but uses CEAB\, LEAB\, and OEAB\ inputs. On-chip termination resistors at the outputs reduce system noise caused by reflections. The CY74FCT2543T can replace the CY74FCT543T to reduce noise in an existing design.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

• Function and Pinout Compatible With FCT and F Logic
• 25-Output Series Resistors to Reduce Transmission-Line Reflection Noise
• Reduced VOH (Typically = 3.3 V) Versions of Equivalent FCT Functions
• Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
• Ioff Supports Partial-Power-Down Mode Operation
• Matched Rise and Fall Times
• Fully Compatible With TTL Input and Output Logic Levels
• 12-mA Output Sink Current 15-mA Output Source Current
• Separation Controls for Data Flow in Each Direction
• Back-to-Back Latches for Storage
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)
• 3-State Outputs

• IOL (Max) (mA)
• 12
• IOH (Max) (mA)
• -15
• Technology Family
• FCT
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 85

CY74FCT2543T的完整型号有：CY74FCT2543ATQCT、CY74FCT2543ATSOC、CY74FCT2543CTQCT、CY74FCT2543CTSOC，以下是这些产品的关键参数及官网采购报价：

CY74FCT2543ATQCT，工作温度：-40 to 85，封装：SSOP (DBQ)-24，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网CY74FCT2543ATQCT的批量USD价格：.427（1000+）

CY74FCT2543ATSOC，工作温度：-40 to 85，封装：SOIC (DW)-24，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CY74FCT2543ATSOC的批量USD价格：.267（1000+）

CY74FCT2543CTQCT，工作温度：-40 to 85，封装：SSOP (DBQ)-24，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网CY74FCT2543CTQCT的批量USD价格：.427（1000+）

CY74FCT2543CTSOC，工作温度：-40 to 85，封装：SOIC (DW)-24，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CY74FCT2543CTSOC的批量USD价格：.267（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。