SN74LS684NSR

Overview

The SN74LS684NSR is an octal binary or BCD magnitude comparator manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 30 ns. The device utilizes a 20-pin SOIC package and supports surface mount installation. It functions across a temperature range of 0°C to +70°C, with a maximum power supply current of 70 mA.

Feature Summary

• Performs octal binary or BCD magnitude comparison operations
• Provides dedicated outputs for equality, greater than, and less than conditions

Applications

• Digital data comparison circuits
• BCD code validation systems
• Address decoding logic

Procurement Notes

Verify the specific suffix 'NSR' corresponds to the tape-and-reel packaging format on official distributor listings. Confirm the manufacturer designation as Texas Instruments to ensure component authenticity. Cross-reference the datasheet revision date against your design requirements to validate parameter consistency.

Selection Notes

Select this component when an octal magnitude comparator is required for binary or BCD applications. Ensure the system operates within the specified 4.75 V to 5.25 V voltage range. Verify that the 20-pin SOIC package fits the available PCB footprint and that the 30 ns propagation delay meets timing constraints.

Part Context

This part belongs to the SN74LS series of logic comparators from Texas Instruments. It is designed for standard TTL-compatible digital logic applications requiring high-speed magnitude comparison. The device is distinct from identity-only comparators by providing separate outputs for inequality states.

Replacement Considerations

Check for SN74LS684 variants with different packaging suffixes if reel quantities are unsuitable. Verify pinout compatibility before substituting with other octal comparators from different manufacturers.