54FCT245TDB

Overview

The 54FCT245TDB is an octal bidirectional bus transceiver manufactured by Renesas Electronics Corporation. It utilizes FCT/PCT-CMOS technology and is housed in a 20-pin plastic DIP package. The device operates with a single power supply of 5 V and supports a wide temperature range from -55 °C to +125 °C. It features three-state outputs and provides a propagation delay of 6.8 ns at nominal supply voltage. The component is designed for asynchronous two-way communication between data buses, controlled by a transmit/receive input that determines the direction of data flow.

Feature Summary

• Octal bidirectional data transfer capability for asynchronous bus communication
• Wide industrial and military temperature operation range up to 125 °C
• Three-state output configuration for efficient bus line management

Applications

• Asynchronous two-way communication between data buses
• Military-grade electronic systems requiring extended temperature tolerance
• Industrial control systems utilizing standard 5 V logic interfaces

Procurement Notes

Verify RoHS compliance status as the specific part may be marked non-compliant in certain databases. Confirm the exact suffix 'TDB' corresponds to the 20-pin DIP plastic package variant. Ensure the procurement channel provides official datasheets confirming the -55 °C to +125 °C operating range. Check for availability of the Mil version equivalent if higher reliability standards are required for the specific application environment.

Selection Notes

Select this component when designing systems requiring robust bidirectional data transfer across multiple lines simultaneously. The wide temperature range makes it suitable for harsh environments where standard commercial grade parts would fail. Consider the 20-pin DIP form factor for prototyping or legacy socket-based designs. Ensure the system voltage aligns with the specified 5 V core requirement to maintain signal integrity and timing specifications.

Part Context

This device belongs to the FCT (Fast CMOS Technology) family of logic components, which offers high-speed performance comparable to TTL while maintaining low power consumption typical of CMOS devices. The 54-series designation indicates a military-grade temperature rating, distinguishing it from the commercial 74-series counterparts. Renesas continues to support this lineage for applications requiring proven, high-reliability interface solutions.

Replacement Considerations

The 74FCT245T is the commercial-grade equivalent offering identical electrical functionality but limited to a -40 °C to +85 °C operating range. Verify pin compatibility and package dimensions before substitution. Note that the 54-series part provides superior thermal resilience for extreme environments.