74AC257MTR

Signal Switches, Multiplexers, Decoders Overview

The STMicroelectronics 74AC257MTR is a quad 2-channel multiplexer with 3-state outputs, fabricated using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It features four independent multiplexers sharing common SELECT and ENABLE (OE) inputs. The device operates within a supply voltage range of 2V to 6V. Key electrical characteristics include a typical propagation delay of 4.5ns at VCC = 5V, maximum quiescent supply current of 4μA at 25°C, and symmetrical output impedance with |IOH| = IOL = 24mA minimum. It provides high noise immunity with VNIH = VNIL = 28% VCC minimum.

Signal Switches, Multiplexers, Decoders Feature Summary

• Non-inverting quad 2-channel multiplexer architecture with common data select and enable inputs
• High-speed CMOS performance utilizing sub-micron silicon gate and double-layer metal wiring technology
• Enhanced ESD protection circuits providing 2kV immunity against static discharge on all inputs and outputs

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented systems requiring direct interface capabilities via 3-state outputs
• Multiplexer expansion by tying outputs together
• Transmission line driving applications with 50Ω capability

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'MTR' corresponds to the tape and reel packaging format rather than tube packaging when sourcing components. Confirm that the procurement documentation explicitly references the STMicroelectronics manufacturer for this part number to ensure authenticity and traceability of the C2MOS fabrication process.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring non-inverting signal routing with high-speed switching capabilities. Ensure the system logic levels align with the specified input voltage thresholds across the 2V to 6V operating range. Consider the 3-state output functionality for bus sharing applications where high-impedance states are required to isolate unused channels.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74AC series of advanced CMOS logic devices manufactured by STMicroelectronics. It serves as a functional equivalent to standard 74LS257 devices but offers significantly higher speed and lower power consumption due to its sub-micron fabrication technology. The MTR suffix indicates surface-mount availability in tape and reel packaging suitable for automated assembly processes.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check datasheets for pin compatibility and electrical specifications before substituting with other quad 2-to-1 multiplexers from different manufacturers.