SN74S140D

Inverter Gates Overview

The SN74S140D is a dual 4-input positive-NAND gate integrated circuit manufactured by Texas Instruments. It belongs to the SN54/74S Schottky TTL logic family and is housed in a 14-pin SOIC surface-mount package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range from 0°C to +70°C. Key electrical characteristics include a propagation delay of 6.5 ns, a low-level output current capability of 40 mA, and a high-level output current capability of -60 mA.

Inverter Gates Feature Summary

• Features two independent 4-input NAND gates per package for complex logic implementation
• Provides high-speed switching performance characteristic of the Schottky TTL series
• Delivers strong output drive capabilities with specified high and low-level currents

Inverter Gates Applications

• High-speed digital logic processing circuits
• Industrial control systems requiring reliable TTL interface
• Test and measurement equipment logic stages

Inverter Gates Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-14 package variant when sourcing. Confirm RoHS compliance status as it may vary by production batch or region. Ensure the supplier provides official datasheets matching the SN74S140 designation to avoid confusion with similar SN54 or SN74LS variants. Check for any specific handling requirements related to static sensitivity during assembly.

Inverter Gates Selection Notes

Select this component when designing circuits requiring dual 4-input NAND functionality with Schottky speed. It is suitable for applications needing robust noise immunity and fast propagation delays compared to standard TTL. Consider the SOIC-14 package constraints for PCB layout. Evaluate if the 5V supply requirement aligns with the system power architecture before finalizing the design.

Inverter Gates Part Context

This part is a member of the Texas Instruments SN54/74S family, known for Schottky clamping to prevent saturation and improve switching speeds. The SN74S140 specifically implements the NAND function with four inputs per gate. It serves as a fundamental building block for combinational logic designs in industrial and commercial electronics where moderate speed and high drive strength are required.

Inverter Gates Replacement Considerations

SN74S140D is a parameter-equivalent replacement for SN74S140DR.