54FCT373CTLB

Overview

The IDT 54FCT373CTLB is an octal transparent D-type latch belonging to the FCT (Fast CMOS) logic series. It features eight independent D-type latches with true outputs and three-state capabilities, housed in a 20-lead ceramic dual flatpack (CDFP) package. The device operates on a single 5 V supply and supports a wide industrial temperature range from -55 °C to +125 °C. Key electrical parameters include a propagation delay of 5.1 ns at nominal supply voltage and a maximum output current of 32 mA. The component is designed for high-speed data storage applications requiring reliable performance under demanding thermal conditions.

Feature Summary

• Octal configuration providing eight independent transparent D-type latches within a single integrated circuit.
• Three-state output capability enabling direct connection to system buses without external buffering.
• High-speed CMOS technology ensuring low power consumption while maintaining fast switching speeds.
• Robust construction utilizing ceramic packaging suitable for extended industrial and military temperature environments.

Applications

• High-speed data bus buffering and temporary storage in computer systems
• Parallel-to-serial conversion circuits requiring precise timing control
• Industrial control systems operating in extreme temperature conditions
• Military aerospace avionics requiring radiation-hardened or high-reliability logic components

Procurement Notes

Verify the specific ordering suffix to confirm the exact package type and material composition, as variations exist within the FCT family. Ensure compatibility with existing PCB footprints for the 20-lead ceramic dual flatpack configuration. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Confirm that the supplier provides traceable documentation for quality assurance purposes.

Selection Notes

Select this component when designing systems requiring octal latching with three-state outputs and high-speed performance. Consider the ceramic package for applications demanding superior thermal stability and reliability compared to plastic alternatives. Evaluate the 5.1 ns propagation delay against system timing requirements to ensure signal integrity. Verify that the 5 V supply voltage aligns with the rest of the digital logic family used in the design.

Part Context

The 54FCT373CTLB is part of the broader 54FCT logic family produced by Integrated Device Technology, now Renesas Electronics. This family bridges the performance gap between standard TTL and advanced CMOS technologies. The specific CTLB variant denotes the ceramic dual flatpack package, distinguishing it from other package options like SSOP or PLCC found in the same logical function family.

Replacement Considerations

Direct replacements include the IDT54FCT373ATE and IDT54FCT373ATEB, which share identical logical functionality but may differ in package style. Cross-reference with Renesas-branded equivalents such as the 54FCT373TLB, noting potential differences in termination or marking. Always verify pinout compatibility and electrical specifications before substituting any component in an existing design.