CD54HCT174F3A

Overview

The CD54HCT174F3A is a high-speed CMOS logic hex D-type flip-flop with reset, manufactured by Texas Instruments. It features six independent D-type flip-flops in a single package. The device operates on a nominal supply voltage of 5 V, with a range from 4.5 V to 5.5 V. It supports a maximum frequency of 17 MHz and has a load capacitance of 50 pF. The component is housed in a 16-pin ceramic DIP package (DIP16,.3) and is designed for military-grade reliability, functioning within an operating temperature range of -55 °C to +125 °C.

Feature Summary

• Hex configuration providing six independent D-type flip-flops for complex data storage applications
• High-speed CMOS technology ensuring fast switching capabilities within the HCT logic family
• Military-grade ceramic packaging suitable for harsh environmental conditions and extended temperature ranges

Applications

• Data storage registers in high-reliability computing systems
• Shift register configurations for serial-to-parallel data conversion
• State machine implementations in aerospace and defense electronics

Procurement Notes

Verify that the specific part number CD54HCT174F3A matches the required military or commercial grade specifications, as suffixes may indicate different qualification levels. Confirm the ceramic DIP package integrity and pin compatibility with existing board layouts. Ensure compliance with RoHS directives if applicable, noting that some legacy military parts may have specific exemptions. Cross-reference the manufacturer documentation for any recent design changes or obsolescence notices before finalizing procurement orders.

Selection Notes

Select this component when a hex D-type flip-flop with reset is required in a high-speed CMOS environment. The HCT series ensures TTL-compatible input thresholds, simplifying interface with older logic families. The ceramic package is essential for applications demanding superior thermal stability and hermetic sealing compared to plastic alternatives. Consider the 16-pin footprint and power supply requirements during circuit design to ensure adequate drive capability and signal integrity across the specified temperature range.

Part Context

This component belongs to the Texas Instruments 54HCT logic family, which combines high-speed CMOS performance with TTL-compatible inputs. The 54-series designation typically indicates military-grade quality and extended temperature ranges, distinguishing it from the commercial 74-series variants. As a hex D-type flip-flop, it serves as a fundamental building block for sequential logic circuits, offering reliable data latching and transfer functions in critical digital systems.

Replacement Considerations

CD54HC174F3A offers similar functionality but lacks HCT input compatibility. CD74HC174 provides comparable logic functions in a plastic package, suitable for non-military applications. Verify pinout and electrical characteristics against these alternatives to ensure functional equivalence in the target circuit design.