74FCT574PC

Overview

The 74FCT574PC is an octal D-type flip-flop manufactured by National Semiconductor, now part of Texas Instruments. It features eight positive-edge-triggered D-type latches with three-state outputs. The device operates within a supply voltage range of 4.75V to 5.25V and supports a quiescent current of 40 µA. It utilizes a 20-pin PDIP package for through-hole mounting. The component exhibits an input capacitance of 6 pF and functions across a temperature range of 0°C to 70°C.

Feature Summary

• Octal configuration providing eight independent D-type latches in a single package
• Three-state outputs allowing direct bus line connections without external buffers
• Positive-edge triggering mechanism for precise data capture timing
• Non-inverting output polarity maintaining logical signal integrity

Applications

• Parallel-to-serial data conversion circuits
• General-purpose register storage applications
• Bus interface buffering systems

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific 'PC' suffix corresponds to the PDIP-20 through-hole package variant rather than surface-mount options. Ensure the source document explicitly lists National Semiconductor as the original manufacturer or Texas Instruments as the successor to validate authenticity and traceability for this legacy part number.

Selection Notes

Select this component when through-hole mounting is required for octal latch applications. The 4.75V to 5.25V supply range aligns with standard 5V logic systems. Consider the 0°C to 70°C commercial temperature range against environmental requirements. Compare propagation delay specifications if high-speed performance is critical for the target design.

Part Context

This part belongs to the 74FCT logic family, designed for fast CMOS performance with TTL-compatible inputs. The 74FCT574 series specifically provides octal edge-triggered flip-flops. National Semiconductor originally developed this series before its acquisition by Texas Instruments, which continues to support the product line under the TI brand while retaining original part numbering conventions for compatibility.

Replacement Considerations

Public confirmed substitute part numbers include CY74FCT574ATQCT and CY74FCT574CTQCT from Texas Instruments. These equivalents maintain functional compatibility within the same FCT logic family. Verify package differences, as these substitutes may utilize SSOP or QSOP formats instead of the PDIP configuration.