SN74LS26D

Inverter Gates Overview

The SN74LS26D is a Low Power Schottky (LSTTL) quad 2-input NAND gate with open-collector outputs, manufactured by Texas Instruments. It utilizes Schottky diodes to prevent saturation, ensuring high-speed operation and reduced power consumption compared to standard TTL logic. The device features four independent NAND gates, each equipped with an open-collector output stage suitable for wired-AND configurations or driving loads requiring higher voltage/current than standard TTL levels. Designed for commercial temperature ranges, it operates within a supply voltage range of 4.75V to 5.25V. The component is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package, providing a compact footprint for surface-mount applications.

Inverter Gates Feature Summary

• Open-collector output configuration allows for flexible interfacing with various load types and enables wired-AND logic implementation without external components.
• Low Power Schottky technology incorporates internal clamping diodes to minimize storage time and prevent transistor saturation, resulting in faster switching speeds and lower power dissipation.
• Quad 2-input NAND architecture provides four independent logic gates within a single integrated circuit, maximizing board space efficiency.

Inverter Gates Applications

• High-speed digital logic circuits requiring fast switching times and low power consumption.
• Wired-AND bus structures where multiple outputs are connected to a common line.
• Interface drivers for connecting TTL logic to higher voltage loads or different logic families.

Inverter Gates Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product life cycle status, as the 'D' suffix indicates a SOIC package which may have varying availability or obsolescence status depending on the region and distributor. Confirm RoHS compliance and lead finish specifications if environmental regulations apply to your assembly process. Ensure that the operating temperature range aligns with your system's thermal requirements, as commercial variants typically cover 0°C to 70°C.

Inverter Gates Selection Notes

Select this component when designing systems that require the specific electrical characteristics of Low Power Schottky logic, particularly the balance between speed and power dissipation. The open-collector output is essential if the design necessitates driving loads at voltages exceeding the standard VCC level or implementing multi-driver bus architectures. Consider the SOIC package dimensions and thermal performance relative to other available packages like PDIP or CDIP based on your PCB layout constraints and manufacturing capabilities.

Inverter Gates Part Context

The SN74LS26 belongs to the broader 74LS series of logic integrated circuits, which was widely adopted in the 1980s and 1990s for digital systems due to its improved performance over standard 7400 series parts. While largely superseded by CMOS technologies like 74HC and 74HCT in modern designs, LSTTL remains relevant in legacy systems and specific industrial applications where its robust noise immunity and drive capability are advantageous. The SN74LS26 specifically addresses the need for open-collector NAND functionality within this established logic family.

Inverter Gates Replacement Considerations

Direct pin-compatible replacements include the SN74LS26N (PDIP package) and SN74LS26DR (tape and reel packaging). For non-pin-compatible but functionally equivalent alternatives, consider checking datasheets for other manufacturers offering LSTTL quad 2-input NAND gates with open-collector outputs, ensuring voltage and timing parameters match.