SN74ALS253N

Overview

The SN74ALS253N is a dual 1-of-4 data selector/multiplexer from the Texas Instruments ALS logic family. It features two independent multiplexers with three-state outputs, housed in a 16-pin PDIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 12 ns. It provides unidirectional data routing with high fan-out capabilities suitable for TTL loads.

Feature Summary

• Dual independent 1-of-4 multiplexer architecture
• Three-state output control for bus driving
• ALS series performance characteristics

Applications

• Data routing in digital systems
• Bus line selection
• Address decoding applications

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-16 through-hole package variant. Confirm RoHS compliance status via the official datasheet as requirements vary by manufacturing date code. Ensure the ordering part number matches the exact functional specification required for your circuit design before finalizing procurement.

Selection Notes

Select this component when dual independent multiplexing with three-state outputs is required in a through-hole configuration. The ALS series offers improved speed over standard 74LS logic while maintaining compatible pinouts. Verify that the 12 ns propagation delay meets the timing constraints of your target application frequency.

Part Context

This component belongs to the SN74ALS00-series of advanced low-power Schottky logic devices. These ICs are designed for high-speed digital applications requiring lower power consumption than standard LS logic. The SN74ALS253 specifically addresses needs for multi-channel data selection in microprocessor-based systems.

Replacement Considerations

Direct pin-compatible substitutes include the SN74ALS253DR (SOIC package) or other manufacturers' equivalents like the MC10ALS253. Verify electrical parameters such as propagation delay and output current drive capabilities match the original design specifications.