74HCT574DB,112

Overview

The 74HCT574DB,112 is an octal D-type flip-flop with 3-state outputs manufactured by Nexperia. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes the HCT logic family for TTL-compatible input levels. The component is housed in a 16-lead SSOP package and supports surface-mount installation. It features a single clock input and includes clamp diodes on inputs to facilitate interface with voltages exceeding VCC using current-limiting resistors. The device is specified for operation across a temperature range of -40 °C to +125 °C.

Feature Summary

• Octal D-type flip-flop architecture providing eight independent storage elements
• Three-state output capability for efficient bus-oriented system integration
• TTL-compatible input levels ensuring direct interfacing with standard logic families
• Asynchronous reset function allowing immediate clearing of stored data

Applications

• Bus-oriented memory mapping systems
• Parallel-to-serial data conversion circuits
• General-purpose register implementations in digital logic designs
• Microprocessor interface port buffering

Procurement Notes

Verify component authenticity through official Nexperia channels or authorized distributors. Confirm that the specific ordering suffix matches the required package variant. Check current availability status as discontinuation notices may apply to legacy logic families. Ensure compliance with RoHS directives relevant to the manufacturing date code. Validate pinout compatibility against existing PCB footprints before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring parallel data storage with high-speed bus driving capabilities. The HCT series ensures compatibility with TTL-driven environments while maintaining CMOS power efficiency. Consider the 3-state outputs for managing multiple devices on shared data lines. Evaluate thermal performance requirements given the wide operating temperature specification. Verify that the SSOP package dimensions fit the available board space constraints.

Part Context

This part belongs to the 74HCT logic family, which bridges CMOS technology with TTL input standards. It serves as a fundamental building block for sequential logic circuits in industrial and consumer electronics. The device complements other Nexperia logic components like decoders and multiplexers to form complete digital control systems. Its robust design supports reliable operation in noisy electrical environments common in embedded applications.

Replacement Considerations

Public confirmed substitute part numbers include 74HCT574D,652 and 74HCT574PW,118. These alternatives offer equivalent logical functionality and pinout compatibility. Verify package type differences between SSOP and SO or TSSOP variants during substitution planning.