74AC257TTR

Signal Switches, Multiplexers, Decoders Overview

The STMicroelectronics 74AC257TTR 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, symmetrical output impedance with |IOH| = IOL = 24mA minimum, and high noise immunity defined as VNIH = VNIL = 28% VCC minimum.

Signal Switches, Multiplexers, Decoders Feature Summary

• Advanced high-speed CMOS fabrication utilizing sub-micron silicon gate and double-layer metal wiring C2MOS technology for enhanced performance.
• Non-inverting quad 2-channel multiplexer architecture with common data select and active-low output enable inputs.
• High noise immunity and 50Ω transmission line driving capability ensuring signal integrity in demanding environments.
• Outputs capable of switching to a high-impedance state via the OE input, facilitating direct interfacing with bus-oriented systems.

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system data routing
• Transmission line driving applications
• Multiplexer expansion by tying outputs together

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering suffix 'TTR' corresponds specifically to the TSSOP-16 package configuration as listed in the official datasheet order codes. Confirm that the component meets the required operating temperature range of -55°C to +125°C for your specific application environment. Ensure compatibility with the specified 2V to 6V supply voltage constraints during system design validation.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a non-inverting quad multiplexer with 3-state outputs is required for high-speed digital logic applications. The device is suitable for designs needing symmetrical output drive capabilities and low power dissipation. Consider its pin and function compatibility with standard 74 series devices if migrating from legacy architectures. Verify that the TSSOP-16 package dimensions meet the PCB layout requirements.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74AC series of advanced CMOS logic devices manufactured by STMicroelectronics. It is functionally compatible with the standard 74 series 257 but offers improved speed and lower power consumption due to the C2MOS technology. The 74AC257TTR variant specifically denotes the tape and reel packaging format for the TSSOP-16 surface-mount package.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The datasheet indicates pin and function compatibility with the 74 series 257. Designers may consider other members of the 74AC family or equivalent parts from other manufacturers that offer similar quad 2-input multiplexer functionality with 3-state outputs, provided they match the electrical specifications and package type.