SN74ALS33ADE4

Overview

The SN74ALS33ADE4 is a commercial-grade logic buffer manufactured by Texas Instruments. It contains four independent 2-input positive-NOR gates with open-collector outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from 0°C to 70°C. Propagation delays are specified as 10 ns maximum for low-to-high transitions and 12 ns maximum for high-to-low transitions under standard test conditions.

Feature Summary

• Features four independent 2-input positive-NOR buffers
• Outputs utilize open-collector configuration requiring external pull-up resistors
• Supports wired-AND applications and higher output voltage levels

Applications

• Wired-AND bus implementations
• Interface circuits requiring higher voltage level translation
• General-purpose digital logic buffering

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type, lead finish, and environmental compliance status. Confirm availability and lifecycle status directly with authorized distributors or the manufacturer before procurement planning.

Selection Notes

Select this component when a NOR function with open-collector outputs is required in a compact surface-mount format. Ensure the application design includes appropriate external pull-up resistors to achieve correct logical operation and desired voltage levels.

Part Context

This part belongs to the Texas Instruments ALS (Advanced Low-power Schottky) logic family. It provides enhanced switching speeds compared to standard LS logic while maintaining lower power consumption. The 'E4' suffix typically denotes specific manufacturing or environmental attributes defined by the manufacturer.

Replacement Considerations

SN74ALS33AD