SN74F38DR

Overview

The SN74F38DR is a quad 2-input NAND buffer gate with open-collector outputs, manufactured by Texas Instruments in a 14-pin SOIC package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C. The device features low-level output current capabilities up to 64 mA and high-level output leakage currents of 250 µA. Switching characteristics include propagation delays ranging from 1 ns to 14 ns depending on load conditions.

Feature Summary

• Contains four independent 2-input NAND buffer gates with open-collector outputs
• Outputs require external pull-up resistors for correct operation
• Supports active-low wired-OR or active-high wired-AND logic functions when connected to other open-collector outputs
• Capable of generating higher output voltage levels than the supply rail

Applications

• Implementing active-low wired-OR logic configurations
• Implementing active-high wired-AND logic configurations
• Generating output voltage levels exceeding the standard supply voltage
• General-purpose digital buffering applications requiring open-collector interfaces

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel specifications. The SN74F38DR designation indicates a tape-and-reel format suitable for automated assembly processes. Confirm RoHS compliance and moisture sensitivity level ratings prior to procurement to ensure compatibility with your manufacturing standards and storage requirements.

Selection Notes

Select this component when designing circuits that require open-collector NAND logic functionality. Ensure the design includes appropriate external pull-up resistors, as the internal structure does not provide a high-state drive capability. Verify that the required output current and voltage levels align with the device's electrical characteristics and that the operating environment remains within the specified commercial temperature range.

Part Context

This part belongs to the Texas Instruments SN74F series, which utilizes fast TTL logic technology. The SN74F38 variant specifically provides open-collector outputs, distinguishing it from standard push-pull output variants. It serves as a digital logic component designed for general-purpose applications requiring flexible output interfacing and wired logic capabilities within standard integrated circuit form factors.

Replacement Considerations

Direct functional substitutes include the SN74F38N (PDIP package) and SN74F38NSR (SOP package). Cross-reference with SN54F38 variants if military-grade temperature ranges are required, noting the difference in operating specifications.