SN74AS02D

Overview

The SN74AS02D is a quadruple 2-input positive-NOR gate from the Texas Instruments AS logic series. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a load capacitance of 50 pF. The device features a maximum low-level output current of 20 mA and a propagation delay of 5.5 ns. It is housed in a 14-pin SOIC package and functions reliably across an operating temperature range of 0°C to 70°C.

Feature Summary

• Contains four independent 2-input NOR gates for complex logic implementation
• Provides high-speed signal processing with 5.5 ns propagation delay
• Delivers robust drive capability with 20 mA low-level output current

Applications

• High-speed digital logic circuits requiring fast switching speeds
• Data acquisition systems utilizing standard TTL-compatible interfaces
• Industrial control applications operating within commercial temperature ranges

Procurement Notes

Verify the specific ordering suffix against official Texas Instruments documentation to confirm pinout compatibility and package dimensions. Ensure the component meets RoHS standards if required by your manufacturing process. Confirm that the lead time aligns with production schedules, as availability may vary based on regional distribution channels and current market demand.

Selection Notes

Select this component when design requirements demand faster switching speeds than standard LS or ALS logic families provide. The 20 mA sink current capability allows direct driving of multiple loads without additional buffering. Verify that the 5.5 ns propagation delay fits within the system timing constraints and that the 14-SOIC package accommodates the available PCB real estate.

Part Context

This part belongs to the Texas Instruments SN74AS family, which represents a high-speed variant of the standard 7400-series logic. The AS series was engineered to offer significantly improved performance over previous generations while maintaining electrical compatibility with existing TTL designs. This specific model provides the NOR function necessary for implementing various Boolean logic operations in digital systems.

Replacement Considerations

The SN74AS02DG4 is a verified equivalent part number offering identical functionality and specifications.