SN74F253NSR

Overview

The SN74F253NSR is a dual 4-input multiplexer manufactured by Texas Instruments, belonging to the SN74F logic family. It features two independent 4-to-1 data selectors housed in a 16-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation. Key electrical specifications include a propagation delay of 9 ns at 5 V, with output currents rated at -3 mA for high state and 24 mA for low state. It functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual independent 4-to-1 multiplexing architecture
• High-speed signal selection with 9 ns propagation delay
• Three-state outputs for bus-oriented applications

Applications

• Data routing in digital systems
• Address decoding circuits
• Signal selection in microprocessor interfaces

Procurement Notes

Verify the specific suffix 'NSR' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and ensure compatibility with automated assembly processes. Confirm RoHS compliance status through current environmental documentation before finalizing procurement orders.

Selection Notes

Select this component when dual independent 4-channel multiplexing is required within the standard 5V logic family constraints. Ensure the design accommodates the specified 9 ns propagation delay and that the load requirements align with the -3 mA high and 24 mA low output drive capabilities defined in the technical specifications.

Part Context

This part belongs to the SN74F series, known for high-speed performance compared to standard TTL logic. The SN74F253 variant specifically provides dual multiplexer functionality, distinguishing it from single-channel or demultiplexer counterparts within the same logic family portfolio.

Replacement Considerations

Cross-reference with SN74F253DR for identical functional specifications in alternative packaging formats. Verify pinout compatibility and electrical parameters against other SN74F253 variants before substitution.