74ACT257MTCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT257MTCX is a quad 2-input multiplexer with 3-STATE outputs, housed in a 16-lead Thin Shrink Small Outline Package (TSSOP). It selects four bits of data from two sources using a common Data Select input. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. Outputs present selected data in true form and can be switched to high impedance via the Output Enable input. Propagation delay is typically 7.0 ns at 5.0 V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexing capability with noninverting 3-STATE outputs
• Outputs source and sink up to 24 mA for robust drive capability
• TTL-compatible inputs facilitate direct interfacing with TTL logic systems
• Multiplexer expansion supported by tying outputs together

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system interfaces requiring high impedance states
• Data selection between two sources for four-bit parallel transmission
• Logic implementation of 4-pole, 2-position switches
• Multiplexer expansion configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering code includes the 'X' suffix to confirm tape and reel packaging, as standard versions may use tubes. Confirm the specific package variant matches the TSSOP-16 footprint requirements. Ensure the design accounts for the ACT series voltage thresholds when integrating with existing circuitry. Check for any recent Product Change Notifications regarding material composition or manufacturing site changes.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with 3-STATE outputs is required for bus applications. The ACT series provides TTL-compatible inputs, making it suitable for systems interfacing with legacy TTL logic. Verify that the 4.5 V to 5.5 V supply voltage range aligns with the system power rails. Consider the propagation delay specifications if timing constraints are critical for the data path.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT257 family of quad 2-input multiplexers. It shares functional similarities with the 74AC257 but features TTL-compatible inputs characteristic of the ACT series. The device is manufactured under Fairchild Semiconductor standards, now part of onsemi. It is designed for general-purpose digital logic applications requiring data routing and bus isolation.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include MC74ACT257DG and 74ACT257MTC. Verify pinout compatibility and electrical characteristics before substitution. Ensure the replacement part supports the same 3-STATE output functionality and voltage ranges.