SN74LS21N

Inverter Gates Overview

The SN74LS21N is a dual 4-input positive-AND gate integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 4.75V to 5.25V and features a propagation delay of 20.0 ns. The device contains two independent logic circuits, each with four inputs, housed in a 14-pin DIP package. It supports an output current of 8 mA and draws a static current of 2.20 mA. Designed for commercial applications, it functions reliably between 0°C and 70°C.

Inverter Gates Feature Summary

• Contains two independent 4-input AND gates
• Compatible with standard TTL logic families
• Provides reliable signal processing in commercial temperature ranges

Inverter Gates Applications

• Digital logic circuit design
• Computer peripheral interfaces
• Control systems requiring multi-input logic operations

Inverter Gates Procurement Notes

Verify the component against official Texas Instruments datasheets to confirm pinout compatibility and electrical specifications. Ensure the procurement source provides genuine parts with valid traceability documentation. Check for RoHS compliance status if environmental regulations apply to the specific manufacturing batch or revision.

Inverter Gates Selection Notes

Select this component when a dual 4-input AND function is required in through-hole designs. It serves as a direct replacement for other LS series equivalents in existing schematics. Consider the 14-pin DIP form factor for prototyping or legacy board layouts where surface-mount options are not feasible.

Inverter Gates Part Context

This part belongs to the Texas Instruments SN74LS series, which utilizes Low-power Schottky technology. This family offers improved speed and power consumption characteristics compared to standard TTL. The SN74LS21N specifically addresses applications needing multiple AND logic functions within a single compact package.

Inverter Gates Replacement Considerations

SN74LS21NE4 is a verified equivalent variant.