MC74LCX257DT

Signal Switches, Multiplexers, Decoders Overview

The MC74LCX257DT is a low-voltage CMOS quad 2-input multiplexer with 3-state, non-inverting outputs. It operates from a 2.3 V to 3.6 V supply and features 5.0 V-tolerant inputs and outputs. The device selects four bits of data from two sources using the Select input, presenting the selected data in true form. Outputs switch to high impedance when Output Enable (OE) is logic HIGH. It provides 24 mA balanced output sink and source capability, near zero static supply current (10 µA), and supports live insertion and withdrawal.

Signal Switches, Multiplexers, Decoders Feature Summary

• Features 5.0 V tolerant inputs and outputs for interface capability with 5.0 V TTL logic.
• Provides IOFF specification guaranteeing high impedance state when VCC = 0 V.
• Supports live insertion and withdrawal operations.

Signal Switches, Multiplexers, Decoders Applications

• Data routing between multiple sources
• Bus-oriented switching applications
• Interface bridging between 5.0 V and 3.3 V systems

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify package suffix 'DT' corresponds to TSSOP-16. Confirm RoHS compliance status if required by procurement specifications. Check datasheet for specific ordering information regarding tape and reel quantities versus rail packaging units.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for low-power multiplexing requiring 5.0 V tolerance. Ensure operating voltage remains within 2.3 V to 3.6 V range. Verify that 24 mA drive capability meets load requirements. Consider propagation delay limits at specific supply voltages for timing-critical designs.

Signal Switches, Multiplexers, Decoders Part Context

Part of the 74LCX family of low-voltage CMOS logic devices. Manufactured by onsemi. Designed for high performance while maintaining CMOS low power dissipation. Compatible with LVTTL and LVCMOS standards.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for equivalent parts with identical pinout and electrical characteristics. Verify compatibility with existing board layout and signal integrity requirements before substitution.

Signal Switches, Multiplexers, Decoders FAQ

What is the maximum input voltage allowed?

The DC input voltage can range from -0.5 V to +7.0 V, allowing safe interfacing with 5.0 V devices.

How does the device handle power-off conditions?

The IOFF specification guarantees that outputs remain in a high impedance state when VCC is 0 V.