CD74FCT245E

Overview

The CD74FCT245E is an octal bus transceiver manufactured by Texas Instruments, belonging to the FCT logic series. It features three-state outputs and operates within a supply voltage range of 4.75 V to 5.25 V. The device supports TTL input and output levels, with a maximum propagation delay of 4.6 ns at 5 V. It provides a low-level output current of 64 mA and a high-level output current of -32 mA. The component is housed in a 20-pin DIP package and functions as a non-inverting transceiver. It is rated for operation between -40 °C and +85 °C.

Feature Summary

• Octal bus transceiver architecture providing eight bidirectional data channels
• Three-state outputs enabling direct connection to system buses
• TTL-compatible input and output voltage levels for interface flexibility

Applications

• High-speed data acquisition systems
• Memory buffer applications
• Bidirectional bus architectures

Procurement Notes

Verify the specific package type against project requirements, as the CD74FCT245E designation typically corresponds to the 20-pin DIP configuration. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Ensure the supplier documentation matches the exact part number suffix to avoid discrepancies in electrical characteristics or packaging format.

Selection Notes

Select this component when designing circuits requiring robust bidirectional data transfer with TTL compatibility. The FCT series offers faster switching speeds compared to standard 74LS logic while maintaining similar pinouts. Consider the 64 mA sink capability for driving moderate loads directly without additional buffering stages.

Part Context

This device is part of the broader 74FCT family of BiCMOS logic components designed for high-performance digital applications. It serves as a functional equivalent to other octal bus transceivers but distinguishes itself through specific speed and drive strength parameters defined by the FCT technology. It complements Texas Instruments' portfolio of interface logic solutions.

Replacement Considerations

The CY74FCT245ATSOCT is listed as a similar alternative from Texas Instruments, though it utilizes a surface-mount SOIC package rather than the through-hole DIP format of the CD variant. Verify pinout compatibility and package dimensions before substituting.