SN74ALS151NSR

Overview

The SN74ALS151NSR is an 8-line to 1-line multiplexer from the Texas Instruments ALS logic family, housed in a 16-pin SOIC package. It operates on a single supply voltage ranging from 4.5 V to 5.5 V. The device features a propagation delay of 14 ns and provides complementary outputs. Key electrical characteristics include a low-level output current of 24 mA and a high-level output current of -8 mA. The static supply current is typically 3 mA, with a maximum operating temperature of +70°C.

Feature Summary

• Provides eight selectable data inputs routed to a single output line via three address select inputs.
• Features complementary outputs for both true and inverted signal paths.
• Includes input clamping diodes to simplify interface design with fast-rising signals.

Applications

• Parallel-to-serial data conversion
• Data source selection in digital systems
• Implementation of specific Boolean functions

Procurement Notes

Verify the specific suffix 'NSR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the ALS logic family specifications align with the target system's power and speed requirements before finalizing procurement orders.

Selection Notes

Select this component when an 8-channel multiplexing function is required within standard TTL-compatible voltage ranges. The ALS series offers improved speed-power product compared to standard LS logic. Ensure the application environment remains within the specified commercial temperature range of 0°C to +70°C.

Part Context

This part belongs to the SN74ALS151 series of 1-of-8 data selectors. It is functionally compatible with other industry-standard 8-input multiplexers but utilizes Advanced Low-Power Schottky technology. The NSR designation indicates surface-mount availability in a small outline integrated circuit package.

Replacement Considerations

Direct pin-compatible substitutes include the SN74LS151N for standard LS logic applications or the SN74ALS151N for equivalent ALS performance in through-hole packages. Verify voltage levels and drive currents when substituting with non-TI manufacturers.

FAQ

What is the function of the enable input on the SN74ALS151NSR?

The enable input allows the user to disable the outputs. When enabled, the selected data input is transmitted to the outputs; when disabled, the outputs are in a high-impedance state.

Does the SN74ALS151NSR provide both true and complemented outputs?

Yes, the device provides two outputs: one representing the selected data input (true) and the other representing the inverse of that input (complemented).