DM74LS273WM

Overview

The DM74LS273WM is an octal D-type flip-flop manufactured by onsemi, belonging to the 74LS logic series. It features eight independent D-type edge-triggered flip-flops with a common clock and an asynchronous active-low master reset. The device utilizes Low Power Schottky (LPS) technology to achieve high-speed operation while maintaining low power dissipation. It is housed in a 20-pin SOIC package with 0.3-inch lead spacing. Key electrical characteristics include a propagation delay of 16 ns at 5V, input clamp diodes for high-speed termination effects, and single-ended inputs and outputs.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops within a single package
• Common clock input synchronizes data capture across all eight channels simultaneously
• Asynchronous active-low master reset clears all outputs independently of the clock signal
• Low Power Schottky technology ensures high switching speeds with reduced power consumption

Applications

• Parallel data storage and buffering in digital systems
• Address latching for microprocessor memory interfaces
• Data register implementation in general-purpose logic circuits
• Output port expansion for microcontroller systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific packaging variants such as tube quantities. Check for obsolescence notices or lifecycle changes prior to procurement. Ensure supply chain stability for long-term production requirements. Validate datasheet revisions match design specifications.

Selection Notes

Select this component when high-speed parallel data handling is required with moderate power constraints. The LS family offers a balance between speed and power compared to standard TTL. Consider pin compatibility with existing 74LS designs. Evaluate thermal performance for dense PCB layouts. Verify voltage levels align with system logic standards.

Part Context

This part belongs to the widely adopted 74-series logic family, specifically the Low Power Schottky variant. It serves as a fundamental building block for sequential logic circuits. The octal structure allows efficient management of multiple data lines. It is commonly used in legacy and modern embedded systems requiring reliable data retention.

Replacement Considerations

Compatible substitutes include MC74LS273N, SN74LS273N, and MM74LS273N. These alternatives maintain identical pinouts and logical functions. Verify package type differences such as DIP versus SOIC. Ensure timing parameters meet application requirements. Cross-reference manufacturer-specific variations in electrical specs.