MC74LVXT4051DT

Overview

The MC74LVXT4051DT is an analog multiplexer/demultiplexer manufactured by onsemi, utilizing high-performance silicon-gate CMOS technology. It features a single-pole eight-throw (SP8T) configuration with three digital channel-select inputs and an active-high enable input. The device operates within a digital power supply range of 2.5 V to 6.0 V and supports analog signals across a split supply range of ±3.0 V. Key electrical parameters include a maximum propagation delay of 40 ns at 2.5 V, reducing to 23 ns at 4.5 V. The maximum ON resistance is 86 Ω at 3.0 V, while the bandwidth reaches 80 MHz. It functions within an operating temperature range of -55°C to +125°C.

Feature Summary

• Utilizes silicon-gate CMOS technology for fast switching speeds and low leakage currents.
• Features improved linearity and lower ON resistance compared to metal-gate or HSL counterparts.
• Includes break-before-make circuitry to prevent signal shorting during channel transitions.
• Provides over-voltage tolerant (OVT) control inputs compatible with standard TTL levels.

Applications

• Signal routing in data acquisition systems requiring analog voltage selection.
• Level translation interfaces between 3.0 V logic and ±3.0 V analog domains.
• Audio and video signal path switching in consumer electronics.
• Test and measurement equipment requiring low crosstalk and high isolation.

Procurement Notes

Verify the specific ordering suffix 'DT' corresponds to the TSSOP-16 package when sourcing components. Confirm RoHS compliance status as required by project specifications, noting that Pb-free variants are available under different suffixes such as 'DG'. Ensure the procurement documentation matches the exact part number to avoid confusion with similar SOIC or SOEIAJ packages.

Selection Notes

Select this component when a single 8:1 analog switch is required with TTL-compatible control logic. It is suitable for applications needing operation on a single supply (VEE = GND) or split supplies up to ±3.0 V. Consider the TSSOP-16 package constraints regarding thermal dissipation and board space. Verify that the required propagation delay and ON resistance meet the system's signal integrity requirements at the target supply voltage.

Part Context

This device belongs to the MC74LVXT4051 series of high-performance analog switches. It shares pinout compatibility with legacy devices like the HC4051A and metal-gate MC14051B, facilitating direct upgrades in existing designs. The LVXT series specifically targets low-voltage applications, offering superior performance metrics over older CMOS technologies while maintaining functional equivalence with standard logic families.

Replacement Considerations

Public confirmed substitute part numbers include MC74LVXT4051D (SOIC-16), MC74LVXT4051DR2G (SOIC-16 Tape & Reel), and MC74LVXT4051DTG (TSSOP-16 Pb-Free). Cross-reference with SN74LV4051ATPWRQ1 for automotive-grade alternatives, though package and parameter differences may exist.