SN74HC257PWRG4

Overview

The SN74HC257PWRG4 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 non-inverted outputs, a typical propagation delay of 9 ns at 5 V, and low input current of 1 µA maximum. It is housed in a 16-pin TSSOP package.

Feature Summary

• Provides four independent channels for selecting between two data sources controlled by shared address inputs
• Features 3-state outputs that enter high-impedance state when output enable is inactive
• Designed for bus interface applications allowing multiple sources to drive data lines without loading

Applications

• Bus interface systems requiring signal selection from multiple sources
• Data routing in high-performance digital systems
• Multiplexing signals from 4-bit data sources to 4-output data lines

Procurement Notes

Verify the specific ordering suffix '1G4' against the manufacturer's latest Package Option Addendum to confirm active production status and material compliance details. Ensure the TSSOP-16 package dimensions match the design footprint requirements. Confirm RoHS compliance and lead finish specifications directly with the supplier documentation prior to procurement.

Selection Notes

Select this component for designs requiring quadruple 2-to-1 multiplexing with tri-state capability. The HC logic family offers compatibility with standard CMOS levels. Consider the 2 V to 6 V operating range for flexibility in power supply design. Verify thermal resistance values if operating near maximum temperature limits.

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 part of the broader 74HC logic family, designed for general-purpose digital applications requiring low power consumption and high noise immunity.

Replacement Considerations

SN74HC257PWR is the direct predecessor variant without the G4 suffix. SN74HC257DR is the SOIC package equivalent. SN74HCT257 variants are available for TTL-compatible input levels.