CY74FCT2245T中文资料具有三态输出和串联阻尼电阻的八路总线收发器数据手册TI规格书

描述 Description

The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The CY74FCT2245T current-sinking capability is 12 mA at the A and B ports. The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to A ports. The output-enable (OE\\) input, when high, disables both the A and B ports by putting them in the high-impedance state. This device is 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 and Pinout Compatible With FCT and F Logic
• Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
• Fully Compatible With TTL Input and Output Logic Levels
• 200-V Machine Model (A115-A)
• 12-mA Output Sink Current 15-mA Output Source Current
• 3-State Outputs