74LCX125YTTR

Overview

The STMicroelectronics 74LCX125YTTR is an automotive-grade, low-voltage CMOS quad bus buffer featuring three-state outputs. It operates within a supply voltage range of 2.0 V to 3.6 V and provides 5 V tolerant inputs and outputs. The device utilizes sub-micron silicon gate technology for high-speed performance with a maximum propagation delay of 5.2 ns at 3 V. It includes power-down protection on all I/Os and meets AEC-Q100 qualification standards. Packaged in TSSOP-14 tape and reel.

Feature Summary

• Automotive grade qualification compliant with AEC-Q100 standards
• Provides 5 V tolerance on both input and output pins
• Features symmetrical output impedance with 24 mA drive capability
• Includes power-down protection circuits on all inputs and outputs

Applications

• Automotive electronic systems
• Industrial control equipment
• Computer peripheral interfaces
• Consumer electronics devices

Procurement Notes

Verify the specific ordering suffix YTTR confirms the TSSOP-14 package and automotive grade status. Confirm that the component meets AEC-Q100 requirements if used in automotive designs. Check datasheet revision history for updates regarding marking codes or environmental compliance specifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring 5 V signal interfacing from a 3.3 V logic domain. Ensure the application demands automotive reliability standards defined by AEC-Q100. Verify that the required operating temperature range aligns with the specified -40 °C to +85 °C limits for reliable operation under varying environmental conditions.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices manufactured by STMicroelectronics. It serves as a direct functional replacement for standard 74HC125 buffers while offering improved speed and lower power consumption. The device is designed to interface seamlessly between different voltage domains in modern digital circuit architectures.

Replacement Considerations

Direct pin-compatible alternatives include the non-automotive 74LCX125TTR. Other manufacturers may offer equivalent quad bus buffers, but verify that any substitute also meets AEC-Q100 automotive qualification requirements if the original design intent specifies automotive grade components.