74ACT257SCX

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT257SCX is a quad 2-input multiplexer featuring three-state outputs, housed in a 16-lead SOIC package. It operates on a single supply voltage ranging from 4.5V to 5.5V and supports an operating temperature range of -40°C to 85°C. The device provides high-speed data selection with TTL-compatible inputs and offers output drive capabilities of 24mA for both high and low states.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-to-1 multiplexing capability with independent select lines
• Three-state outputs enabling direct bus-oriented system interfacing
• TTL-compatible input logic levels for broad compatibility

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented data routing systems
• High-speed signal switching applications
• Data acquisition multiplexing circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific datasheet revision and RoHS compliance status before procurement, as component specifications may vary across manufacturing batches. Confirm that the 16-SOIC package dimensions align with your PCB footprint requirements. Ensure the selected variant meets the required operating temperature range for your specific application environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with three-state outputs is required for bus-based architectures. Verify that the 4.5V to 5.5V supply voltage range matches your system power rails. Consider the 24mA output drive strength for load requirements and ensure the 16-SOIC surface mount package fits your assembly constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT series of advanced CMOS logic devices, designed to offer performance comparable to bipolar Schottky TTL while maintaining low power consumption. The 74ACT257 specifically addresses the need for multiple independent data selectors within a single integrated circuit package.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The MC74ACT257DG from onsemi serves as a verified functional substitute, offering identical pinout and electrical characteristics. Other compatible variants include the 74ACT257LCT in a ceramic LCC package.