74LCX125YMTR

Overview

The STMicroelectronics 74LCX125YMTR is an automotive-grade, low-voltage CMOS quad bus buffer featuring three-state outputs and 5 V tolerant inputs and outputs. It operates within a supply voltage range of 2.0 V to 3.6 V and supports a recommended input/output voltage up to 5.5 V. The device provides symmetrical output impedance with a minimum drive capability of ±24 mA at 3.0 V to 3.6 V. Propagation delay is specified as a maximum of 5.2 ns at 3.0 V to 3.6 V. It utilizes SO-14 surface-mount packaging and functions across a temperature range of -40 °C to +85 °C.

Feature Summary

• Automotive grade qualification according to AEC Q100 standards
• 5 V tolerant inputs and outputs for mixed-signal interfacing
• Power-down protection on all inputs and outputs
• Balanced propagation delay characteristics

Applications

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

Procurement Notes

Verify the specific automotive grade designation (marked 'Y') against project requirements. Confirm that the SO-14 package dimensions align with the target PCB layout. Ensure the operating environment remains within the specified -40 °C to +85 °C temperature range. Validate that the 5.5 V input tolerance meets system signal levels. Check for any updated datasheet revisions affecting electrical parameters.

Selection Notes

Select this component when driving 5 V loads from lower voltage logic sources in harsh environments. The automotive qualification ensures reliability under varying thermal conditions. The high drive current supports direct connection to buses or multiple loads. Consider the 5.2 ns propagation delay for timing-critical applications. Verify power consumption constraints against the quiescent current specifications.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices manufactured by STMicroelectronics. The 'Y' suffix denotes automotive grade qualification, distinguishing it from standard commercial variants like the 74LCX125MTR. It serves as a non-inverting buffer within the broader 74xx logic family ecosystem.

Replacement Considerations

Direct functional substitutes include the standard commercial version 74LCX125MTR if automotive qualification is not required. Other manufacturers offer pin-compatible alternatives such as MC74LCX125DWR2G from onsemi or SN74LVC125ADWR from Texas Instruments, though specific automotive certifications must be verified separately.