SN74AS151NSR

Overview

The SN74AS151NSR is a high-speed 1-of-8 data selector/multiplexer from the Texas Instruments AS logic series. It features eight input channels and one output in a 16-SO package. Key electrical parameters include a propagation delay of 4.5 ns, low-level output current of 400 uA, and high-level output current of -8 mA. It operates within a supply voltage range of 4.5 V to 5.5 V, with a maximum static current of 25 mA. The device supports surface mount installation and functions reliably between 0°C and +70°C.

Feature Summary

• Provides high-speed data selection with minimal propagation delay for efficient transfer
• Features low power consumption and high noise immunity characteristics
• Configures as an 8-to-1 multiplexer with single output capability

Applications

• High-speed digital data routing systems
• Multiplexing applications requiring fast switching speeds
• Data acquisition systems utilizing AS logic family components

Procurement Notes

Verify the specific suffix 'SR' indicates tape-and-reel packaging when ordering. Confirm the AS logic series designation matches system requirements for speed and drive strength. Ensure the 16-pin SOIC package footprint aligns with the target PCB layout. Validate that the 4.5V to 5.5V operating voltage range is compatible with the host circuit's power supply rails.

Selection Notes

Select this component when system design demands faster switching speeds than standard LS or ALS families provide. The AS series offers superior performance but may require careful attention to signal integrity due to higher slew rates. Compare against obsolete NS variants to ensure availability of the reel-packaged SR version. Verify compatibility with existing 5V logic interfaces and check if lower speed HC alternatives suffice for cost reduction.

Part Context

This part belongs to the Texas Instruments SN74ASxx high-speed Schottky logic family. It serves as a direct functional replacement for older multiplexer designs requiring improved speed. The device integrates eight data inputs into a single output stream controlled by select lines. It represents a specialized solution for time-critical digital signal processing tasks within industrial or commercial electronics.

Replacement Considerations

The SN74AS151NS is listed as an obsolete substitute option. Verify pinout compatibility before swapping with other 1-of-8 multiplexers. Check datasheets for differences in output drive capabilities and propagation delays across alternative manufacturers.