74ACT257SJ

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT257SJ is a quad 2-input multiplexer featuring non-inverting three-state outputs. It operates within a supply voltage range of 4.5V to 5.5V and utilizes a 16-lead Small Outline Package (SOP). The device provides TTL-compatible inputs and supports output source/sink currents of 24mA. It functions as a data selector, allowing four bits of data from two sources to be selected via common select inputs.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides four independent 2-to-1 data selection channels with common control inputs
• Features non-inverting outputs capable of driving bus-oriented systems through high-impedance states
• Incorporates TTL-compatible input thresholds for direct interfacing with standard logic families

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system data routing
• Data selector circuits in digital logic designs
• Multiplexing applications requiring three-state output isolation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix SJ against the manufacturer's current datasheet to confirm package dimensions and pinout compatibility. Confirm RoHS compliance status and lead-free material declarations directly with the supplier or original documentation before integration into production designs.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with three-state outputs and TTL-compatible inputs is required. Ensure the operating environment stays within the specified voltage and temperature ranges. Verify that the SOP-16 package fits the available PCB footprint constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT series of advanced CMOS logic devices. It serves as a functional equivalent to other quad 2-input multiplexers in the industry, offering high-speed operation and low power consumption typical of ACT family components while maintaining compatibility with standard logic interfaces.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Equivalent parts include MC74ACT257DG and SN74AHCT257. Verify pin compatibility and electrical specifications such as propagation delay and output drive strength before substitution.