74LVC2G126DCUTE4

Overview

The SN74LVC2G126DCUTE4 is a dual bus buffer gate with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and supports 5-V VCC operation. The device features inputs that accept voltages up to 5.5 V, allowing it to function as a down translator from 5.5 V inputs to lower VCC levels. It offers a maximum propagation delay (tpd) of 4 ns at 3.3 V and provides ±24-mA output drive capability at 3.3 V. The component includes Ioff support for live insertion and partial-power-down modes.

Feature Summary

• Supports live insertion and partial-power-down applications through integrated Ioff circuitry that disables outputs during power-up to prevent backflow.
• Functions as a down translator, accepting input signals up to 5.5 V while operating at lower VCC levels.
• Provides high-impedance state control via associated output-enable (OE) inputs to manage data flow.

Applications

• Live insertion systems requiring protection against damaging current backflow
• Partial-power-down mode implementations in multi-voltage systems
• Bus buffering and line driving in low-voltage logic circuits

Procurement Notes

Verify the specific package marking code C26Q or C26R corresponds to the DCU package variant. Confirm RoHS compliance status and lead finish details (CU NIPDAU) match project requirements. Ensure the ordering suffix aligns with the desired tape and reel quantity specifications provided in the packaging information section.

Selection Notes

Select this component when designing systems requiring dual-channel buffering with 3-state outputs in a compact NanoFree package. It is suitable for applications needing translation between 5.5 V logic levels and lower voltage domains. Consider its low power consumption and ESD protection ratings for robust signal integrity in dense PCB layouts.

Part Context

This part belongs to the SN74LVC2G126 series of dual bus buffer gates. It utilizes Texas Instruments' NanoFree technology for miniaturized packaging. The device is designed for general-purpose digital logic applications where space constraints and low voltage operation are critical design factors.

Replacement Considerations

SN74LVC2G126DCUT is a compatible alternative within the same series offering identical electrical characteristics and functionality in the same DCU package configuration.

FAQ

How does the device handle partial-power-down scenarios?

The integrated Ioff circuitry automatically disables the outputs when the device is powered down, preventing damaging current backflow through the device into the power rails.

Can this buffer translate signals from 5.5 V logic?

Yes, the inputs accept voltages up to 5.5 V, allowing the device to be used as a down translator from 5.5 V sources to lower VCC levels.