74LCX541TTR

Overview

The STMicroelectronics 74LCX541TTR is a low voltage CMOS octal bus buffer featuring non-inverted logic and three-state outputs. It utilizes sub-micron silicon gate and double-layer metal wiring C2MOS technology for high-speed performance with a maximum propagation delay of 8.0 ns at VCC = 3V. The device operates within a supply voltage range of 2.0V to 3.6V, supporting 1.5V data retention. It provides symmetrical output impedance with a minimum drive current of 24 mA at VCC = 3V. Inputs and outputs are 5V tolerant, allowing direct interfacing with 5V signal environments. The component includes power-down protection on all I/O pins.

Feature Summary

• Features 5V tolerant inputs and outputs for seamless interfacing with 5V signal environments while operating at lower voltages.
• Provides high-speed performance with balanced propagation delays and symmetrical output impedance suitable for PCI bus levels.
• Includes power-down protection on inputs and outputs to prevent excessive current draw during power-off states.

Applications

• Low power and high speed 3.3V applications
• Interfacing between 3.3V and 5V signal environments
• PCI bus level buffering

Procurement Notes

Verify the package type matches the TSSOP-20 designation associated with the 'TTR' suffix in the ordering codes table. Confirm that the specific lot requires tape and reel packaging as indicated by the suffix code. Ensure the design supports the specified operating temperature range of -55°C to 125°C if used in industrial conditions.

Selection Notes

Select this component when an octal bus buffer is required for 3.3V systems interfacing with 5V peripherals. The 74LCX541 offers superior speed compared to standard 74HC series devices while maintaining lower power consumption. Its pinout is compatible with the legacy 74 Series 541, facilitating straightforward upgrades or replacements in existing designs requiring higher performance.

Part Context

This part belongs to the 74LCX family of low voltage CMOS logic devices manufactured by STMicroelectronics. The LCX series is designed to provide high-speed operation with low power dissipation, making it suitable for battery-powered and portable applications. The 74LCX541 specifically functions as an octal buffer, expanding the capabilities of single-channel buffers to handle eight-bit data paths simultaneously.

Replacement Considerations

Direct substitutes include the 74LCX541M (SOP package) from the same manufacturer. Other manufacturers producing equivalent 74LCX541 parts in TSSOP-20 packages may also serve as functional replacements, provided they meet the same electrical specifications and pin compatibility requirements.