SN74F20DR

Overview

The SN74F20DR is a dual 4-input positive-NAND gate manufactured by Texas Instruments. It belongs to the SN74F logic series and features a SOIC-14 surface-mount package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 3.6 ns, a low-level output current of 20 mA, and a high-level output current of -1 mA. It supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Contains two independent 4-input NAND gates in a single package
• Compatible with standard TTL logic levels
• Designed for surface-mount assembly via SOIC-14 package

Applications

• Digital logic circuit design
• Microprocessor system interfaces
• General-purpose switching applications

Procurement Notes

Verify the component authenticity against official Texas Instruments documentation. Confirm the specific suffix 'D' corresponds to the SOIC-14 package and tape-and-reel packaging format. Ensure the order matches the exact part number SN74F20DR to avoid compatibility issues with alternative logic families or pinouts.

Selection Notes

Select this component when a dual 4-input NAND function is required in space-constrained designs. The SN74F series offers faster switching speeds compared to standard 74LS counterparts. Consider the SOIC-14 footprint constraints and thermal dissipation requirements for the specific PCB layout during integration.

Part Context

This part is part of the SN74F family, known for high-speed performance. It serves as a fundamental building block for complex digital systems requiring multiple NAND operations. The DR suffix indicates the specific reel packaging configuration used for automated assembly processes.

Replacement Considerations

Direct substitutes include SN74F20N (PDIP) or SN74F20NSR. Verify pinout compatibility and electrical specifications before substitution.