SN74ALS520N

Comparators Overview

The SN74ALS520N is an octal identity comparator manufactured by Texas Instruments in the ALS logic family. It features eight independent comparison channels with a logic function of A = B. The device utilizes a 20-pin PDIP package and operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum propagation delay of 22 ns, a maximum power supply current of 19 mA, and a low-level output current of 24 mA. It supports a wide operating temperature range from 0°C to +70°C.

Comparators Feature Summary

• Provides eight-bit identity comparison functionality where outputs indicate equality between input pairs.
• Features totem-pole outputs for direct interface with system logic levels.
• Incorporates latching characteristics to maintain data integrity during comparisons.

Comparators Applications

• Digital data validation circuits
• Memory address matching systems
• Parallel data comparison modules

Comparators Procurement Notes

Verify the specific ordering suffix to confirm the package type, as variations exist between through-hole and surface-mount options. Ensure the selected variant matches the required PCB footprint and mounting style. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the manufacturer part number with distributor catalogs to ensure availability and correct revision level.

Comparators Selection Notes

Select this component when eight parallel bits require simultaneous equality checking in digital designs. The ALS technology offers a balance of speed and power consumption suitable for general-purpose logic applications. Consider the PDIP-20 package constraints regarding board space and thermal dissipation. Verify that the 5V supply environment aligns with the specified voltage limits for reliable operation.

Comparators Part Context

This device belongs to the SN74ALS520 series of octal identity comparators. It is part of the broader 74-series logic family, specifically utilizing Advanced Low-power Schottky (ALS) technology. The series provides standardized digital comparison functions for industrial and commercial electronic systems requiring robust signal processing capabilities.

Comparators Replacement Considerations

The SN74ALS520NSR is a surface-mount reel version of the same functional device. The SN74ALS520FN3 is available in an LDCC plastic package. Verify pin compatibility and package dimensions before substituting these variants in existing designs.