74LCX245MTR

Overview

The STMicroelectronics 74LCX245MTR is a low-voltage CMOS octal bus transceiver featuring three-state outputs. It operates within a supply voltage range of 2.0V to 3.6V, with data retention at 1.5V. The device provides high-speed performance with a maximum propagation delay of 7.0 ns at VCC = 3V. It supports symmetrical output impedance and guarantees PCI bus levels at 24 mA. Inputs and outputs are 5V tolerant, allowing direct interfacing with 5V signal environments. The component includes power-down protection on all inputs and outputs.

Feature Summary

• Features 5V tolerant inputs and outputs for safe interfacing with 5V signal environments.
• Provides high-speed asynchronous communication between data buses with balanced propagation delays.
• Includes power-down protection on inputs and outputs to prevent excessive current draw during power-off states.

Applications

• Asynchronous two-way communication between data buses
• Low-power and high-speed 3.3V applications
• Interfacing 3.3V devices with 5V signal environments

Procurement Notes

Verify the specific package type required, as the M suffix indicates SOP packaging while other suffixes denote TSSOP. Confirm RoHS compliance status through official documentation, as older manufacturing runs may differ from current standards. Ensure that the procurement channel sources directly from authorized distributors to guarantee authenticity. Check for any specific handling requirements related to electrostatic discharge protection during storage and installation.

Selection Notes

Select this component when bidirectional data transfer between 3.3V and 5V logic domains is required. It is suitable for designs needing high-speed bus driving with low power consumption. Consider the 5V tolerance feature if the system interfaces with legacy 5V peripherals. Evaluate the operating temperature range against environmental conditions. Verify that the package dimensions fit the available PCB space constraints.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices manufactured by STMicroelectronics. The LCX family is designed for high-speed operation with reduced power dissipation compared to standard CMOS technologies. It maintains pin and function compatibility with the traditional 74 series 245, facilitating drop-in replacements in existing designs while offering improved electrical characteristics.

Replacement Considerations

Check for equivalent parts from other manufacturers that offer the same octal bus transceiver functionality. Verify pinout compatibility and electrical specifications such as propagation delay and output current capabilities. Ensure that alternative components support the required 5V tolerance and operating voltage range. Review datasheets for any differences in package dimensions or thermal characteristics.