SN74HC258PWR

Overview

The SN74HC258PWR 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 high-current inverting outputs capable of driving up to 15 LSTTL loads. The device provides low power consumption with a maximum ICC of 80 µA and includes an active-low strobe input that forces all outputs into a high-impedance state when asserted. It utilizes a TSSOP-16 package.

Feature Summary

• Contains four independent multiplexers controlled by a common address select input
• Provides three-state outputs for direct bus interfacing without loading data lines
• Features inverting logic path where output signals are inverted relative to selected inputs

Applications

• Bus interface systems connecting multiple data sources
• High-performance digital systems requiring signal selection
• Data routing applications utilizing shared communication lines

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-16 package configuration required for your design. Confirm RoHS compliance status and moisture sensitivity level ratings prior to assembly. Ensure the active-low strobe functionality aligns with your system's control logic requirements.

Selection Notes

Select this component when inverting multiplexing behavior is required, as opposed to the non-inverting SN74HC257. Verify that the 2 V to 6 V operating voltage range matches your system's power supply rails. Consider the 3-state output capability if the device will share a common bus structure with other peripherals.

Part Context

This part belongs to the SNx4HC257/SNx4HC258 family of quadruple 2-line to 1-line data selectors. It is functionally identical to the SN74HC257 except for its inverting output characteristic. The device is designed for use in bus-organized systems where signals from multiple sources must be routed to a single output line under common control.

Replacement Considerations

SN74HC257PWR (Non-inverting equivalent)

FAQ

How does the SN74HC258 differ from the SN74HC257?

The SN74HC258 provides inverting outputs, whereas the SN74HC257 provides non-inverting outputs. Both devices share the same pinout and functional block diagram otherwise.

What is the function of the G input?

The G input is an active-low strobe. When G is HIGH, all outputs are forced into a high-impedance state regardless of the A/B select input or data inputs.