SN74AS157N

Overview

The SN74AS157N is a quadruple 1-of-2 data selector/multiplexer from the Texas Instruments AS logic series. It features four independent multiplexers in a 16-pin PDIP package. Key electrical parameters include a propagation delay of 12 ns, a minimum supply voltage of 4.5 V, and a maximum supply voltage of 5.5 V. The device operates within a temperature range of 0°C to +70°C and dissipates up to 1.7 W.

Feature Summary

• Provides four independent 2-to-1 data selection channels
• Utilizes Advanced Schottky (AS) logic for high-speed performance
• Supports through-hole mounting via standard DIP packaging

Applications

• Digital system signal routing
• Data selection tasks
• Logic operations in prototyping

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-16 through-hole package variant. Confirm the AS logic family designation ensures compatibility with 4.5V to 5.5V supply rails. Check RoHS compliance status against current regulatory requirements before finalizing procurement orders.

Selection Notes

Select this component when high-speed switching is required within standard TTL-compatible voltage ranges. The AS series offers faster propagation than standard 74LS equivalents. Ensure the application environment remains within the specified 0°C to +70°C operating temperature limits for reliable operation.

Part Context

This part belongs to the SN74AS157 family of quadruple multiplexers. It shares functional similarities with the SN74AHC157 but utilizes Advanced Schottky technology for different speed and power characteristics compared to AHC or HCT variants.

Replacement Considerations

The SN74AS257N is a related quad multiplexer with three-state outputs. Verify pinout compatibility if substituting with other 74AS series devices.