SN74HC258DT

Overview

The SN74HC258DT 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 range of -40°C to +85°C. The device features four independent multiplexers controlled by a common address select input and an active-low strobe input. At 5 V, it provides ±6-mA output drive capability and has a typical propagation delay of 12 ns.

Feature Summary

• Provides bus interface functionality from multiple sources in high-performance systems
• Features low power consumption with maximum ICC of 80 µA
• Includes high-current inverting outputs capable of driving up to 15 LSTTL loads

Applications

• Multiplexing signals from 4-bit data sources to 4-output data lines in bus-organized systems
• Selecting one of two data sources for digital logic processing
• High-performance system bus interfaces requiring 3-state output control

Procurement Notes

Verify the specific ordering suffix 'DT' against the latest TI Package Option Addendum to confirm current production status and availability. Ensure the SOIC package dimensions match the design requirements. Confirm RoHS compliance and lead finish specifications for the manufacturing batch prior to procurement.

Selection Notes

Choose the SN74HC258DT when inverted outputs are required for the multiplexing function. Select this part over the SN74HC257 if signal inversion at the output stage is necessary without additional logic gates. Verify that the 3-state output control meets the system's bus isolation requirements.

Part Context

This component belongs to the SNx4HC257/258 family of quadruple 2-line to 1-line data selectors. It is pin-compatible with other HC series devices but distinguished by its inverting output configuration. The device is designed for CMOS technology, offering wide voltage operation and compatibility with standard logic families.

Replacement Considerations

Public confirmed substitute part numbers include SN74HC258DR and SN74HC258NSR. These alternatives share identical logical functions and pinouts but differ in packaging or reel specifications.