74LCX540MTC

Overview

The Fairchild Semiconductor 74LCX540MTC is a low-voltage CMOS octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 2V to 3.6V, utilizing advanced CMOS technology for high-speed performance and low power consumption. The device integrates eight independent channels with inverted output polarity, designed for bus-oriented applications. It is housed in a 20-pin TSSOP surface-mount package, suitable for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent buffered channels for parallel data transmission
• Three-state output capability allowing direct connection to bus structures without external switches
• Inverted logic polarity ensuring signal inversion during buffering operations
• Low voltage operation optimized for 2.5V and 3.3V systems with 5V tolerant inputs

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• High-density data acquisition systems
• Capacitively loaded lines and transmission lines

Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor's logic division was acquired by onsemi. Confirm the specific suffix indicates the standard TSSOP-20 package. Ensure the component meets RoHS compliance requirements for your assembly process. Check datasheet revisions for any pinout or electrical characteristic updates compared to legacy documentation.

Selection Notes

Select this component when an octal buffer with inverted outputs and three-state control is required. It is appropriate for designs needing interface between low-voltage logic and higher-voltage buses. Consider the propagation delay specifications relative to your system clock speed. Ensure the thermal characteristics of the TSSOP package align with your board's heat dissipation capabilities.

Part Context

This part belongs to the 74LCX series, which represents low-voltage CMOS logic family. The LCX series is characterized by fast switching speeds and reduced power consumption compared to older HC/HCT families. The 74LCX540 specifically denotes an octal buffer with three-state outputs, widely used in digital systems requiring signal isolation and drive enhancement.

Replacement Considerations

Equivalent parts include MM74LCX540MTC and SN74LCX540. Verify pin compatibility and electrical parameters before substitution. Note that some variants may have different suffixes indicating packaging or temperature grades.