SN74AS258NSR

Overview

The SN74AS258NSR is a quadruple 2-input multiplexer featuring three-state outputs, manufactured by Texas Instruments in the AS logic series. 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 utilizes a 16-pin Small Outline Package (SOP/NS). Key electrical characteristics include a low-level output current of 48 mA and a high-level output current of -15 mA. Propagation delays from data inputs (A or B) to outputs are between 1 ns and 4 ns, while address input (A/B) delays range from 2 ns to 10 ns.

Feature Summary

• Provides bus interface capabilities from multiple sources in high-performance systems
• Multiplexes signals from four 4-bit data sources to four-output data lines
• Three-state outputs prevent loading of data lines when output-enable is high

Applications

• Bus-organized system signal routing
• High-performance system bus interfaces
• Data selector applications requiring tri-state isolation

Procurement Notes

Verify the specific package marking and manufacturer date code against the latest TI Package Option Addendum to confirm authenticity. Ensure the component matches the SOP-16 physical dimensions and pinout configuration detailed in the datasheet. Confirm RoHS compliance status for the specific lot before integration into final assemblies.

Selection Notes

Select this component for designs requiring fast switching speeds within the AS logic family. Verify that the system power supply remains strictly within the 4.5 V to 5.5 V range to maintain specified electrical characteristics. Ensure the application environment stays within the 0°C to 70°C commercial temperature limits defined for the SN74AS variant.

Part Context

This part belongs to the Texas Instruments SN74AS258 series of quadruple 2-input multiplexers with three-state outputs. It is functionally related to the SN74ALS258A and SN74AS257 variants, sharing similar packaging options but differing in speed and drive strength specifications characteristic of the AS logic family.

Replacement Considerations

SN74ALS258AN

FAQ

How does the output-enable input affect the data lines?

When the output-enable (OE) input is at a high logic level, the three-state outputs do not load the data lines.

What is the maximum propagation delay from the address inputs?

The maximum propagation delay from the A/B address inputs to any output Y is 10 ns under standard test conditions.