CY74FCT646T中文资料具有三态输出的八路总线寄存收发器数据手册TI规格书

描述 Description

The \\x92FCT646T devices consist of a bus transceiver circuit with 3-state, 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 as the appropriate clock pin goes to a high logic level. Output-enable (G\\) and direction (DIR) inputs control the transceiver function. In the transceiver mode,data present at the high-impedance port can be stored in either the A or B register, or in both. Select controls (SAB, SBA) can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when G\\ is low. In the isolation mode (G\\ is high), A data can be stored in the B register and/or B data can be stored in the A register. 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
• ESD Protection Exceeds JESD 22
• 200-V Machine Model (A115-A)
• Independent Register for A and B Buses
• 12-mA Output Source Current
• 32-mA Output Source Current
• 3-State Outputs