SN74LS21NSR

Inverter Gates Overview

The SN74LS21NSR is a dual 4-input positive AND gate manufactured by Texas Instruments. It belongs to the 74LS logic series and operates within a supply voltage range of 4.75 V to 5.25 V. The device features two independent gates, each with four inputs and one output. Key electrical parameters include a low-level output current of 8 mA and a propagation delay of 10 ns. It is designed for surface-mount installation in a 14-pin SOIC package and supports an operating temperature range from 0°C to +70°C.

Inverter Gates Feature Summary

• Contains two independent 4-input AND logic gates
• Provides high noise immunity characteristic of LS technology
• Compatible with standard TTL logic families

Inverter Gates Applications

• Digital logic circuit design
• Data processing systems
• Control logic applications

Inverter Gates Procurement Notes

Verify that the ordering suffix 'N' corresponds to the SOIC-14 package and 'SR' indicates tape-and-reel packaging. Confirm RoHS compliance status as specified in the manufacturer's documentation. Ensure the component matches the SN74LS21 functional specification before integration into designs requiring 4-input AND functionality.

Inverter Gates Selection Notes

Select this component when a dual 4-input AND gate is required in a surface-mount application. It serves as a suitable alternative to through-hole variants like the SN74LS21N for automated assembly processes. Consider the 70°C maximum operating temperature limit for thermal management requirements.

Inverter Gates Part Context

This part is part of the Texas Instruments 74LS family of logic integrated circuits. The 74LS series is known for its low-power Schottky characteristics, offering a balance between speed and power consumption. The SN74LS21 specifically provides dual 4-input AND functionality, distinguishing it from other gates in the series such as NAND or OR types.

Inverter Gates Replacement Considerations

The SN74LS21N is a verified pin-compatible through-hole replacement. Other 74LS series manufacturers may offer equivalent parts, but verify voltage and timing specifications.