SN74ALS520DWR

Comparators Overview

The SN74ALS520DWR is an octal binary/BCD identity comparator manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features active-low outputs that indicate equality between two 8-bit inputs (A=B). The device utilizes a 20-pin SOIC package with surface-mount installation. Key electrical specifications include a maximum propagation delay of 12 ns, a maximum supply current of 19 mA, and low-level output current capability of 24 mA. It supports an operating temperature range from 0°C to +70°C.

Comparators Feature Summary

• Provides eight-bit identity comparison functionality with active-low outputs for A=B indication
• Incorporates internal pull-up resistors on Q inputs to simplify circuit design
• Features enable input control for managing data flow and reducing power consumption

Comparators Applications

• Digital system data validation
• Memory address matching
• Control logic verification

Comparators Procurement Notes

Verify the specific suffix DWR confirms the tape-and-reel packaging format required for automated assembly processes. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the exact package type and reel quantity specifications needed for production lines.

Comparators Selection Notes

Select this component when designing systems requiring high-speed 8-bit equality checks within standard TTL voltage levels. The ALS series offers improved speed-power product compared to standard 74LS equivalents. Consider the SOIC-20 package constraints and thermal dissipation requirements for dense PCB layouts.

Comparators Part Context

This device belongs to the Texas Instruments SN74ALS520 family of octal identity comparators. It is part of the Advanced Low-Power Schottky (ALS) logic series, which balances switching speed with power efficiency. The DWR suffix specifically denotes the SOIC-20 surface-mount package configuration supplied in tape-and-reel format.

Comparators Replacement Considerations

SN74ALS520N

Comparators FAQ

What is the logic function of the SN74ALS520DWR?

The device functions as an 8-bit identity comparator where the output indicates if input A equals input B.

Does the SN74ALS520DWR have internal pull-up resistors?

Yes, it includes 20kΩ pull-up resistors on the Q inputs.