CD54HCT574F3A

Overview

The CD54HCT574F3A is a high-speed CMOS logic octal D-type positive-edge triggered flip-flop with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs. The device provides non-inverting data transfer from the eight D inputs to the Q outputs upon the rising edge of the clock signal. It is housed in a 20-lead CDIP package and supports military-grade temperature ranges from -55°C to +125°C.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops with positive-edge triggering for simultaneous data capture.

Applications

• Military aerospace systems requiring wide temperature stability
• High-speed digital data storage registers
• Industrial control logic interfaces

Procurement Notes

Verify the specific F3A suffix against the manufacturer's current production status, as this designation often indicates a specialized or limited-run variant. Confirm that the 20-lead CDIP package matches the target PCB footprint and thermal requirements. Ensure compatibility with existing 5V logic levels and check for any recent obsolescence notices from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when an octal register with 3-state output capability is required for military or industrial environments. The HCT series ensures direct compatibility with standard TTL logic families while maintaining CMOS low power consumption. Verify that the 20-lead CDIP package is suitable for the intended through-hole assembly process and that the -55°C to +125°C operating range meets the environmental specifications.

Part Context

This part belongs to the Texas Instruments 54HCT family of high-speed CMOS logic devices. The 54-series designation typically signifies military-grade qualification and wider operating temperature ranges compared to commercial 74-series counterparts. The CD54HCT574 serves as a fundamental building block for sequential logic circuits requiring parallel data storage and controlled output buffering.

Replacement Considerations

SN54HCT574J