SN74LS38D

Inverter Gates Overview

The SN74LS38D is a quad two-input NAND gate integrated circuit manufactured by Texas Instruments. It belongs to the 74LS logic family and features open-collector outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V. It is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package with surface-mount installation. Key electrical characteristics include a maximum propagation delay of 32 ns at 5 V with a 45 pF load, a maximum low-level output current of 24 mA, and a maximum high-level output current of -0.25 mA. The component supports an operating temperature range from 0°C to +70°C.

Inverter Gates Feature Summary

• Contains four independent two-input NAND gates
• Features open-collector outputs for wired-logic applications
• Compatible with standard TTL logic families

Inverter Gates Applications

• General-purpose digital logic circuits
• Wired-AND bus implementations
• Interface driving for higher voltage loads

Inverter Gates Procurement Notes

Verify the manufacturer part number SN74LS38D against official Texas Instruments documentation to confirm pinout and electrical specifications. Ensure the selected package variant matches the required surface-mount footprint. Confirm RoHS compliance status and lead-free designation if applicable to your manufacturing standards. Cross-reference datasheet revisions to ensure compatibility with existing design constraints.

Inverter Gates Selection Notes

Select this component when open-collector NAND functionality is required in a compact surface-mount form factor. The LS series offers speed suitable for moderate-frequency digital systems. Consider the open-collector nature for level shifting or bus sharing requirements. Verify that the 24 mA sink capability meets the load requirements of the connected circuitry.

Inverter Gates Part Context

This device is part of the Texas Instruments 74LS series, which provides Low-power Schottky logic performance. The SN74LS38D specifically addresses the need for multiple NAND gates in space-constrained PCB designs. It serves as a fundamental building block for combinational logic and signal processing tasks in commercial electronic equipment.

Inverter Gates Replacement Considerations

SN74LS38N is a direct pin-compatible through-hole alternative. SN74LS38DR is the tape-and-reel version of the same SOIC package. SN74HC38D offers similar functionality with CMOS technology but requires verification of voltage levels and drive strength differences.