SN74AS02NS

Overview

The SN74AS02NS is a quadruple 2-input positive-NOR gate from the Texas Instruments SN74AS series. It operates within a supply voltage range of 4.5 V to 5.5 V and features a 14-pin SOIC package. Key electrical parameters include a maximum propagation delay of 4.5 ns at 5V with 50pF load, low-level output current of 20 mA, and high-level output current of -2 mA. The device supports a working temperature range of 0°C to 70°C.

Feature Summary

• Provides four independent 2-input NOR logic functions in a single integrated circuit
• Delivers high-speed signal processing capabilities characteristic of the AS logic family
• Utilizes push-pull output stages for robust drive strength

Applications

• High-speed digital logic circuits requiring NOR functionality
• Data acquisition systems utilizing fast switching gates
• Industrial control applications operating within standard TTL voltage levels

Procurement Notes

Verify the specific suffix 'NS' against official Texas Instruments documentation to confirm the exact package variant and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the 14-SOIC form factor. Confirm RoHS compliance status through the manufacturer's latest product information file before procurement.

Selection Notes

Select this component when high-speed performance is critical compared to standard ALS or S series alternatives. The AS series offers significantly faster propagation delays suitable for demanding timing constraints. Verify that the 20 mA sink capability meets the load requirements of the connected downstream logic inputs.

Part Context

This part belongs to the SN74AS (Advanced Schottky) family, designed for superior speed-performance-power dissipation trade-offs. It serves as a high-speed alternative to older bipolar logic families while maintaining pinout compatibility with standard 14-pin DIP and SOIC packages used across various industrial and commercial electronic designs.

Replacement Considerations

SN74ALS02NS: Offers similar functionality but with slower propagation speeds and lower power consumption. SN74AS02DR: Identical logical function and electrical characteristics, differing only in the surface-mount package type (SOIC vs. potentially different SOIC width or reel configuration).

FAQ

What is the maximum propagation delay for the SN74AS02NS?

The maximum propagation delay is 4.5 ns when tested at a supply voltage of 5V with a 50pF load.

Does the SN74AS02NS support rail-to-rail operation?

No, the device requires a supply voltage between 4.5 V and 5.5 V and does not operate at lower voltages such as 3.3 V.