SN74HC258PWT

Overview

The SN74HC258PWT 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 features inverted outputs. The device provides high-current drive capability, supporting up to 15 LSTTL loads at 5 V. Typical propagation delay is 12 ns at 4.5 V. It includes an active-low strobe input that forces all outputs into a high-impedance state when asserted.

Feature Summary

• Provides four independent multiplexing channels controlled by a common address select input
• Features inverted logic outputs for signal path flexibility
• Includes 3-state outputs controlled by an active-low strobe input
• Designed for bus interface applications in high-performance systems

Applications

• Bus interface from multiple sources in high-performance systems
• Multiplexing signals from 4-bit data sources to 4-output data lines
• Data selection between two data sources using a single address line

Procurement Notes

Verify the specific ordering suffix 'PWT' corresponds to the TSSOP-16 package configuration. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure the component meets the required operating temperature range specifications for the intended application environment.

Selection Notes

Select this component when inverted output logic is required for the multiplexing function. Compare against the SN74HC257 if non-inverted outputs are preferred instead. Consider the 3-state output control requirements and ensure the system design accommodates the active-low strobe functionality for proper bus isolation.

Part Context

This part belongs to the SNx4HC257/SNx4HC258 family of quadruple 2-line to 1-line data selectors. It shares the same pinout and functional architecture as the SN74HC257, differing primarily in the inversion of the output logic. Both devices utilize HC CMOS technology for low power consumption and wide voltage operation.

Replacement Considerations

SN74HC257PWR serves as a direct logical alternative if non-inverted outputs are acceptable. Verify package compatibility and electrical characteristics before substitution.