SN74AS158NS

Overview

The SN74AS158NS is a quadruple 2-line to 1-line data selector/multiplexer from Texas Instruments, belonging to the AS logic series. It features four independent multiplexers in a 16-pin PDIP package. Key electrical parameters include a propagation delay of 6 ns and an operating supply voltage range of 4.5 V to 5.5 V. The device supports output currents of 8 mA (low) and 400 µA (high). It operates within a temperature range of 0°C to 70°C.

Feature Summary

• Provides four independent 2-to-1 data selection paths for signal routing
• Utilizes high-speed silicon-gate CMOS technology for rapid switching
• Designed specifically for multiplexing and data routing applications

Applications

• Multiplexing digital signals in communication systems
• Data routing in computing hardware architectures
• Signal selection in industrial control interfaces

Procurement Notes

Verify the specific suffix 'NS' against the manufacturer's official documentation to confirm the exact package type and tape/reel specifications. Ensure the order quantity aligns with the manufacturer's minimum packaging requirements. Confirm that the 0°C to 70°C commercial temperature range meets the operational environment standards before procurement.

Selection Notes

Select this component when high-speed data routing is required within standard TTL-compatible voltage levels. The AS series offers faster performance than standard ALS or HC families. Verify that the 16-pin DIP form factor fits the target PCB layout constraints. Ensure the system design accommodates the specific output drive capabilities defined in the datasheet.

Part Context

This part belongs to the SN74AS158 family of quadruple 2-line to 1-line data selectors. It is functionally similar to other variants like SN74ALS158 but utilizes Advanced Schottky technology for higher speed. The 'N' suffix typically denotes a plastic dual-in-line package, while 'S' may indicate specific packaging or variant details requiring datasheet confirmation.

Replacement Considerations

Check for SN74ALS158 or SN74F158 as potential functional substitutes. Verify pin compatibility and ensure the replacement part meets the required 6 ns propagation delay and 4.5V–5.5V supply voltage specifications. Confirm package equivalence for direct board replacement.