DM74ALS253M

Overview

The DM74ALS253M is a dual 4-input multiplexer from the Advanced Low-power Schottky (ALS) logic family, manufactured by Fairchild Semiconductor. It features two independent multiplexing circuits, each with four data inputs and three select lines to route one of the four inputs to a common output. The device provides 3-state outputs, allowing for bus-oriented communication and isolation when disabled. It operates within a supply voltage range of 4.5 V to 5.5 V and exhibits a propagation delay of 14 ns at 4.5 V to 5.5 V. The component is housed in a 16-lead Small Outline Integrated Circuit (SOIC) package suitable for surface mount technology.

Feature Summary

• Dual independent 4-to-1 multiplexing functionality
• Three-state output capability for bus isolation
• Advanced Low-power Schottky switching technology

Applications

• Data selection and routing in digital systems
• Bus-oriented memory addressing schemes
• Microprocessor system data path configuration

Procurement Notes

Verify the manufacturer designation on the component marking, as Fairchild Semiconductor operations were acquired by onsemi. Confirm the specific suffix 'M' corresponds to the SOIC-16 package variant. Check RoHS compliance status against current regulatory requirements. Ensure the part number matches the exact ALS series specification required for the design.

Selection Notes

Select this component when designing systems requiring dual independent multiplexing channels with high-speed switching characteristics. The ALS series offers improved speed over standard LS logic while maintaining lower power consumption than standard TTL. Verify that the 3-state output requirement aligns with the bus architecture. Ensure the operating temperature range meets the environmental conditions of the application.

Part Context

This component belongs to the DM74ALS series of logic integrated circuits, which are designed for advanced low-power applications. The 74ALS253 specifically addresses the need for multiple multiplexing functions in a single package. It serves as a functional equivalent to other dual 4-input multiplexers within the broader 74xx logic ecosystem, providing compatibility with standard digital logic interfaces.