SN74HC257PWR

Overview

The SN74HC257PWR is a quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature from -40°C to +85°C. The device features non-inverted outputs, typical propagation delay of 9 ns at 5 V, and low input current of 1 µA maximum. It utilizes a TSSOP-16 package.

Feature Summary

• Provides four independent multiplexers controlled by shared address select inputs
• Features 3-state outputs that prevent loading on data lines when disabled
• Compatible with bus interface systems for high-performance applications

Applications

• Bus interface in high-performance systems
• Data selection and routing
• Multiplexing signals from multiple sources

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-16 package and tape-and-reel carrier configuration. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure the active production status aligns with long-term availability requirements for the design.

Selection Notes

Select this component for designs requiring quad 2-to-1 multiplexing with tri-state output control. The HC logic family offers wide voltage compatibility and low power consumption suitable for general-purpose digital systems. Consider the TSSOP-16 package constraints regarding thermal resistance and board space during layout planning.

Part Context

This part belongs to the SNx4HC257 series of quadruple 2-line to 1-line data selectors. It is functionally distinct from the SN74HC258, which provides inverted outputs. The device is pin-compatible with Low-power Schottky TTL (LSTTL) standards, facilitating integration into legacy or mixed-logic environments.

Replacement Considerations

SN74HC257DR: Identical logical function and specifications; differs only in SOIC-16 packaging and larger tape-and-reel quantity.