54ACT257/QEA

Overview

The CD54ACT257E is a quad 2-input multiplexer with three-state outputs manufactured by Rochester Electronics. It features true output polarity and operates on a single supply voltage ranging from 4.5V to 5.5V. The device supports an operating temperature range of -55°C to 125°C and is housed in a 16-pin SOIC surface-mount package with a width of 3.90mm. Output drive capability is specified at 75mA for both high and low states.

Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• Three-state output control for bus-oriented applications
• True output polarity maintaining input signal logic state
• Extended industrial temperature range suitable for harsh environments

Applications

• Data routing in industrial control systems
• Signal selection in communication equipment
• Logic level translation interfaces
• Multiplexed data acquisition circuits

Procurement Notes

Verify the specific manufacturer origin, as Rochester Electronics sources components from various original manufacturers. Confirm the exact package variant and date code upon receipt. Ensure compatibility with existing board layouts and thermal requirements. Check for any lead-free or halogen-free certifications if required by project specifications. Validate electrical parameters against the specific datasheet version provided with the shipment.

Selection Notes

Select this component when a quad multiplexer with three-state outputs is required for high-reliability applications. Consider the extended temperature range for environments exceeding standard commercial limits. Verify that the 5V logic family aligns with the system's voltage levels. Evaluate the SOIC package dimensions against available PCB space constraints.

Part Context

This part belongs to the 54ACT series of logic integrated circuits, designed for military-grade reliability and performance. The 54 prefix typically indicates a wider temperature range compared to the 74 series equivalents. Rochester Electronics provides these components as part of their lifecycle management solutions for obsolete or hard-to-find semiconductors.

Replacement Considerations

Compatible alternatives include MC74ACT257DG and MC74ACT257N. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement part meets the same temperature and voltage requirements.