74LS273PC

Overview

The Fairchild Semiconductor 74LS273PC is an octal D-type flip-flop featuring a common clock and an asynchronous active-low master reset. It operates within a supply voltage range of 4.75 V to 5.25 V, with a typical propagation delay of 27 ns at 5 V. The device provides non-inverting outputs capable of sourcing -2.6 mA and sinking 24 mA. It is housed in a 20-pin plastic dual in-line package (PDIP) and supports commercial operating temperatures from 0°C to +70°C.

Feature Summary

• Octal configuration with eight independent D-type flip-flops sharing a single clock input
• Asynchronous active-low master reset function for immediate output clearing
• Positive edge-triggered data capture synchronized with the clock signal

Applications

• Parallel data storage and buffering in digital systems
• Address latching for memory interfaces
• General-purpose register applications requiring high-speed operation

Procurement Notes

Verify the specific suffix 'PC' corresponds to the Plastic Dual In-Line Package (PDIP-20) variant rather than surface-mount options like SOIC or SSOP. Confirm that the component meets the standard TTL logic family specifications for voltage levels and current drive capabilities required by the target circuit design before finalizing procurement.

Selection Notes

Select this component when an octal register with a dedicated global reset is required. It is suitable for designs utilizing standard 5V TTL logic families. Ensure the application does not require tri-state outputs, as this model features standard non-inverting outputs without bus-hold or three-state control.

Part Context

This part belongs to the 74LS (Low-power Schottky) logic family, known for improved speed over standard 74 series while maintaining lower power consumption. It serves as a fundamental building block for sequential logic circuits, providing reliable data retention and synchronization in microprocessor-based systems and industrial control equipment.

Replacement Considerations

Compatible substitutes include the SN74LS273, MC74LS273, and DM74LS273. These parts share identical logical functionality and pinouts but may vary slightly in electrical characteristics or packaging options depending on the manufacturer.