DM74ALS253M

Overview

The DM74ALS253M is a 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer manufactured by onsemi. It contains two independent multiplexers with full on-chip decoding to select one of four data sources based on a unique two-bit binary code at the Select Inputs (A and B). Each circuit has separate Data inputs, Output Control inputs, and non-inverting 3-STATE output buffers. The device operates within a supply voltage range of 4.5 V to 5.5 V and an operating temperature range of 0 °C to +70 °C. Propagation delay from Select to Y ranges from 5 ns to 21 ns, while Data to Y propagation delay ranges from 2 ns to 14 ns.

Feature Summary

• Features advanced oxide-isolated, ion-implanted Schottky TTL process for improved switching performance.
• Includes internal overlap features in Select input buffers to prevent invalid output transients during address changes.
• Output control circuitry incorporates a power-up 3-STATE feature to ensure safe initialization.
• Pin and functional compatible with LS family counterparts.

Applications

• Data routing in digital systems requiring dual channel selection.
• Bus interface applications utilizing 3-STATE outputs.
• Logic circuits requiring high-speed signal multiplexing.

Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete or subject to lifecycle changes. Confirm package type M16A matches design requirements. Check RoHS compliance status if environmental regulations apply. Ensure replacement parts maintain functional compatibility with existing system logic levels and timing constraints.

Selection Notes

Select this component when dual independent 1-of-4 multiplexing is required with 3-STATE output capability. Verify that the SOIC-16 package fits the PCB layout constraints. Ensure the system operates within the specified 4.5 V to 5.5 V supply voltage range. Consider propagation delays for high-speed signal integrity requirements.

Part Context

This device belongs to the 74ALS logic family, known for advanced Schottky technology offering higher speed than standard TTL. The DM74ALS253 specifically addresses applications needing dual multiplexing functions in a compact 16-lead package. It serves as a direct functional replacement for older LS family equivalents while providing improved transient handling and power-up states.

Replacement Considerations

Check for pin-compatible alternatives from other manufacturers if sourcing is difficult. Ensure any substitute maintains the same 3-STATE output behavior and voltage levels. Verify that propagation delays meet system timing specifications. Confirm package dimensions match the original M16A footprint.