CY74FCT2245ATPC

8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS

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· Function and Pinout Compatible With FCT and F Logic

· 25-Ω Output Series Resistors to Reduce Transmission-Line Reflection Noise

· Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics

· Ioff Supports Partial-Power-Down Mode Operation

· Fully Compatible With TTL Input and Output Logic Levels

· ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

· 12-mA Output Sink Current 15-mA Output Source Current

· 3-State Outputs

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.