74ACT257MTC

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT257MTC is a quad 2-input multiplexer featuring 3-state outputs, housed in a 16-TSSOP surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an industrial temperature range from -40°C to +85°C. The device exhibits a maximum propagation delay of 7.5 ns at 5 V and provides high output drive capability with 24 mA source and sink currents. Inputs are TTL-compatible, facilitating direct interfacing with standard logic systems.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad configuration enabling selection of four bits of data from two sources using a common select input
• Noninverting 3-state outputs allowing direct interface with bus-oriented systems via high-impedance switching
• TTL-compatible inputs ensuring compatibility with standard logic families

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system data routing
• Multiplexer expansion by tying outputs together
• Data selection between multiple sources

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability of refurbished or obsolete stock. Confirm RoHS compliance status as historical documentation may vary. Validate pinout integrity against the 16-TSSOP specification sheet prior to integration. Ensure operating conditions remain within the specified 4.5 V to 5.5 V supply range to maintain performance parameters.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring quad 2-to-1 multiplexing with 3-state output control. The ACT series offers speed comparable to Schottky TTL while maintaining CMOS low power dissipation. Consider the 16-TSSOP package for space-constrained surface-mount designs. Verify that the 24 mA output drive current meets load requirements for the intended circuit topology.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT logic family, designed for high-speed operation similar to equivalent bipolar Schottky TTL but with CMOS low power consumption. The 74ACT257 specifically functions as a quad multiplexer, providing true output form for selected data lines. It is part of a broader ecosystem of compatible logic devices from Fairchild and onsemi.

Signal Switches, Multiplexers, Decoders Replacement Considerations

MC74ACT257DG (onsemi) is a documented substitute offering identical functionality in a 16-SOIC package. MC74AC257 variants provide similar multiplexing features but may differ in electrical specifications such as propagation delay and drive current.