74HCT273N,652

Overview

The NXP 74HCT273N,652 is an octal positive-edge triggered D-type flip-flop housed in a 20-pin PDIP package. It features eight independent D-type flip-flops with a common clock and master reset input. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum operating frequency of 20 MHz at nominal supply, a propagation delay of 32 ns at 4.5 V with 50 pF load capacitance, and a maximum output current of 4 mA. It supports a wide operating temperature range from -40 °C to +125 °C.

Feature Summary

• Octal configuration providing eight independent positive-edge triggered D-type flip-flops
• Common clock and master reset inputs for synchronized data storage and clearing
• TTL-compatible input levels ensuring direct interface with standard logic families

Applications

• Parallel-to-serial data conversion circuits
• Register file implementations in microprocessor systems
• Data buffering and temporary storage in digital control systems

Procurement Notes

Verify the specific ordering code 74HCT273N,652 against manufacturer datasheets to confirm the PDIP-20 package variant. Ensure compliance with RoHS directives and lead-free specifications as indicated by the suffix. Cross-reference thermal ratings and pinout diagrams with PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this component when an octal register with TTL-compatible inputs is required. The HCT series ensures compatibility with older TTL logic standards while offering CMOS performance characteristics. Consider the 20-pin DIP package for through-hole prototyping or legacy board designs requiring robust mechanical mounting.

Part Context

This part belongs to the 74HCT family of high-speed CMOS logic devices manufactured by NXP. It serves as a fundamental building block for sequential logic circuits. The device is functionally similar to other octal D-flip-flops but is distinguished by its specific HCT input thresholds and PDIP packaging format suitable for general-purpose digital applications.

Replacement Considerations

Direct substitutes include the 74HC273N for HC-series operation and the 74LS273N for LS-series compatibility. Verify pinout alignment and voltage level compatibility when replacing with alternative logic families to ensure proper system integration.