SN74AS253ADRG4

Overview

The SN74AS253ADRG4 is a dual 1-of-4 data selector/multiplexer manufactured by Texas Instruments. It belongs to the AS logic series, utilizing Schottky technology for high-speed performance. The device features two independent multiplexers, each selecting one of four data inputs based on address lines. It operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 16-pin SOIC package. The component is designed for applications requiring fast data routing and decoding capabilities.

Feature Summary

• Dual independent 1-of-4 data selection capability
• Schottky-clamped inputs for noise immunity
• High-speed switching characteristics
• Compatible with standard TTL logic levels

Applications

• Data routing in digital systems
• Address decoding circuits
• Signal switching networks
• Multiplexing input channels

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead times prior to ordering. Check for obsolescence notices as this part may be discontinued. Ensure packaging specifications match production requirements. Validate datasheet revisions for accurate electrical parameters.

Selection Notes

Select this component when high-speed data multiplexing is required in 5V logic systems. Compare propagation delays against system timing constraints. Consider pin compatibility with existing PCB layouts. Evaluate power consumption relative to thermal management capabilities. Verify input voltage thresholds match source signal levels.

Part Context

This device is part of Texas Instruments' AS (Advanced Schottky) logic family, known for superior speed-performance-power product compared to standard LS logic. The SN74AS253 specifically addresses needs for rapid data selection in complex digital architectures. It serves as a critical interface component between data sources and processing units in high-frequency applications.

Replacement Considerations

Public confirmed substitute part numbers: SN74AS253DRG4. Verify pinout compatibility and electrical specifications before substitution. Check for functional equivalence in address select and enable configurations.