SN74ALS521DW

Comparators Overview

The SN74ALS521DW is an 8-bit identity comparator manufactured by Texas Instruments in a 20-pin SOIC package. It operates within a supply voltage range of 4.5 V to 5.5 V and functions at temperatures from 0°C to +70°C. The device features active-low outputs indicating when input A equals input B, with propagation delays specified at 12 ns, 20 ns, and 22 ns under varying conditions. Maximum supply current is 19 mA, while output drive capabilities include -2.6 mA high-level and 24 mA low-level currents.

Comparators Feature Summary

• Performs 8-bit identity comparison with active-low output assertion when inputs are equal
• Utilizes Advanced Low-Power Schottky logic for enhanced speed and power efficiency
• Provides open-collector or totem-pole output configurations depending on specific variant implementation

Comparators Applications

• Digital data path equality checking
• Address decoding systems
• Magnitude comparison in control logic

Comparators Procurement Notes

Verify the exact suffix (DWR vs DW) against the manufacturer's latest discontinuance notices, as availability may vary. Confirm RoHS compliance status directly with the supplier documentation. Ensure the ordering part number matches the required package style and temperature grade for your specific design constraints before finalizing procurement.

Comparators Selection Notes

Select this component when an 8-bit identity comparison function is required with Advanced Low-Power Schottky performance characteristics. Consider the 20-pin SOIC package dimensions for PCB layout compatibility. Evaluate the 4.5 V to 5.5 V operating range against your system's power supply stability requirements.

Comparators Part Context

This device belongs to the SN74ALS series of digital logic comparators. It serves as a specialized integrated circuit for comparing two 8-bit binary words. The component is designed for applications requiring fast switching speeds and moderate power consumption within standard TTL-compatible voltage levels.

Comparators Replacement Considerations

Check for SN74ALS521DW equivalents from other manufacturers if Texas Instruments discontinues production. Verify pinout compatibility and electrical specifications before substituting.