DM74LS273N

Overview

The DM74LS273N is an octal D-type flip-flop manufactured by onsemi, belonging to the LS (Low-power Schottky) logic series. It features eight positive-edge-triggered D flip-flops with a common clock and a direct low-active clear input. The device provides true outputs for all eight bits. It operates within a supply voltage range of 4.75 V to 5.25 V, typically rated at 5 V. The component is designed for commercial temperature ranges from 0°C to 70°C and is housed in a 20-pin plastic DIP package.

Feature Summary

• Octal configuration containing eight independent D-type flip-flops sharing a single clock signal
• Positive-edge triggering mechanism captures data inputs upon clock transition
• Direct asynchronous clear input forces all outputs to a low state independently of the clock
• True output polarity providing non-inverted signals corresponding to the data inputs

Applications

• Data storage and buffering in digital systems
• Address latching for microprocessor memory interfaces
• Construction of shift registers and counters
• Pattern generation circuits

Procurement Notes

Verify that the ordering suffix 'N' corresponds to the standard plastic dual in-line package (PDIP-20). Confirm the manufacturer is onsemi or an authorized licensee producing the DM prefix variant. Ensure the component meets LSTTL electrical specifications and commercial temperature ratings required for the target application environment.

Selection Notes

Select this component when an octal register with a global clear function is required in a system utilizing LSTTL logic levels. It is suitable for applications needing parallel data capture synchronized to a single clock edge. Consider pin compatibility with other 74LS series devices if expanding existing circuit designs.

Part Context

The DM74LS273N is part of the widely adopted 74LS family, known for balanced speed and power consumption. As an octal flip-flop, it serves as a fundamental building block for sequential logic. The device simplifies interface design between processors and peripheral hardware by providing reliable data retention capabilities.

Replacement Considerations

Compatible substitutes include SN74LS273N from Texas Instruments and MC74LS273P from Motorola. These alternatives maintain identical pinouts and logical functions within the LSTTL specification.