SN74ALS38BN

Overview

The SN74ALS38BN is a quadruple 2-input positive-NAND buffer with open-collector outputs from the Texas Instruments ALS logic family. 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 a propagation delay of up to 33 ns at 5V with 50pF load. It utilizes a 14-pin PDIP package for through-hole mounting.

Feature Summary

• Contains four independent 2-input NAND buffers
• Outputs are open-collector requiring external pullup resistors
• Supports active-low wired-OR or active-high wired-AND functions

Applications

• Implementing active-low wired-OR logic functions
• Generating higher output voltage levels via external pullups
• General-purpose buffering in digital circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum to confirm the exact physical package type, lead finish, and moisture sensitivity rating. Ensure the selected variant matches the required thermal and electrical specifications for the intended application environment.

Selection Notes

Select this component when open-collector outputs are necessary for wired-logic configurations or level shifting. Verify that the circuit design includes appropriate pullup resistors to ensure correct high-level output states. Confirm that the 0°C to 70°C commercial temperature range meets the operational requirements.

Part Context

This part belongs to the SN54/74ALS38B series of quadruple 2-input NAND buffers. The 'SN' prefix indicates a commercial grade device, while '54' denotes military grade. The 'ALS' suffix identifies the Advanced Low-power Schottky logic family, offering improved speed and power consumption compared to standard TTL equivalents.

Replacement Considerations

Direct replacements include SN74ALS38BDR (SOIC package) and SN74ALS38BNSR (SOP package). Cross-family replacements like SN74LS38 require verification of pinout compatibility and electrical parameter differences.