CY74FCT543T中文资料具有三态输出的八路寄存收发器数据手册TI规格书

描述 Description

The \\x92FCT543T octal latched transceivers contain two sets of eight D-type latches with separate latch-enable (LEAB\\, LEBA\\) and output-enable (OEAB\\, OEBA\\) inputs for each set to permit independent control of input and output in either direction of data flow. For data flow from A to B, for example, the A-to-B enable (CEAB\\) input must be low in order 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 the LEAB\\ signal puts the A latches in the storage mode and their outputs no longer change with the A inputs. With CEAB\\ and OEAB\\ low, the 3-state B-output buffers are active and reflect the data present at the output of the A latches. Control of data from B to A is similar, but uses CEBA\\, LEBA\\, and OEBA\\ inputs. These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

特性 Features

• Function, Pinout, and Drive Compatible With FCT and F Logic
• Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
• Matched Rise and Fall Times
• 3-State Outputs
• 2000-V Human-Body Model (A114-A)
• 1000-V Charged-Device Model (C101)
• Separation Controls for Data Flow in Each Direction
• CY54FCT543T
• 12-mA Output Source Current
• CY74FCT543T
• 32-mA Output Source Current