SN74LS21D

Inverter Gates Overview

The SN74LS21D is a dual 4-input positive-AND gate from the Texas Instruments 74LS series. It operates within a supply voltage range of 4.75V to 5.25V and features a propagation delay of 10 ns. The device provides a low-level output current of 8 mA and a high-level output current of -400 µA. Designed for surface-mount applications, it utilizes a 14-pin SOIC package. The component supports operation across a temperature range of 0°C to +70°C.

Inverter Gates Feature Summary

• Contains two independent 4-input AND logic gates
• Supports surface-mount installation via SOIC-14 package
• Provides standard TTL-compatible logic levels

Inverter Gates Applications

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

Inverter Gates Procurement Notes

Verify that the specific part number matches the required SOIC-14 surface-mount package configuration. Confirm the LS logic family designation aligns with system power and speed requirements. Ensure the commercial temperature rating meets environmental specifications. Cross-reference manufacturer documentation to validate RoHS compliance status before procurement.

Inverter Gates Selection Notes

Select this component when a compact surface-mount solution for dual 4-input AND operations is required. The 10 ns propagation delay suits moderate-speed digital applications. Verify compatibility with existing PCB footprints and soldering processes for the SOIC-14 form factor against through-hole alternatives.

Inverter Gates Part Context

This device belongs to the Texas Instruments 74LS (Low-power Schottky) logic family. It serves as a surface-mount variant of the DIP-based SN74LS21N. The component integrates standard TTL functionality into a compact footprint suitable for automated assembly processes in modern electronic manufacturing.

Inverter Gates Replacement Considerations

SN74LS21DR: Identical function with tape-and-reel packaging.