SN74LS28DR

Inverter Gates Overview

The SN74LS28DR is a quadruple 2-input positive-NOR buffer manufactured by Texas Instruments. It belongs to the SN54/74LS series of logic gates and features four independent NOR circuits within a single package. The device operates with a standard supply voltage range of 4.75 V to 5.25 V. It utilizes a 14-pin Ceramic Dual In-Line Package (CDIP) designed for through-hole mounting on printed circuit boards.

Inverter Gates Feature Summary

• Contains four independent 2-input positive-NOR logic gates
• Compatible with standard TTL logic families
• Hermetically sealed ceramic dual in-line construction

Inverter Gates Applications

• General-purpose digital logic buffering
• TTL-based control systems
• Industrial logic interface circuits

Inverter Gates Procurement Notes

Verify that the specific orderable part number matches the required package type, as the SN74LS28 family includes various packaging options such as CDIP. Confirm RoHS compliance status and lead finish specifications against current manufacturer documentation before procurement, as these attributes vary across different production runs and ordering suffixes.

Inverter Gates Selection Notes

Select this component when a design requires multiple independent NOR functions within a single integrated circuit footprint. Ensure the application environment supports the operating temperature range specified for the commercial grade variant. Verify that the system power supply remains strictly within the 4.75 V to 5.25 V limits to maintain signal integrity and proper logic threshold levels.

Inverter Gates Part Context

This component is part of the broader SN54/74LS family of high-speed low-power Schottky TTL devices. While many modern designs have transitioned to CMOS technologies like the 74HC or 74AHC series, the LS series remains utilized in legacy industrial equipment and specific applications requiring established TTL compatibility and performance characteristics.

Inverter Gates Replacement Considerations

Direct pin-compatible replacements include other variants within the SN54/74LS28 family, such as the SN74LS28N. Cross-family substitutions require careful evaluation of voltage thresholds and drive capabilities.