74LVCH2T45DC-Q100H

Overview

The Nexperia 74LVCH2T45DC-Q100H is a dual-bit, dual-supply translating transceiver with 3-state outputs. It enables bidirectional level translation between two independent voltage domains, VCC(A) and VCC(B), both ranging from 1.2 V to 5.5 V. The device features a direction control input (DIR) to manage data flow between ports nA and nB. It includes IOFF circuitry for partial power-down applications and active bus hold circuitry to maintain valid logic levels on floating inputs.

Feature Summary

• Bidirectional level translation between independent voltage domains
• IOFF circuitry prevents backflow current during partial power-down
• Active bus hold maintains valid logic levels on unused or floating inputs
• Automotive qualification in accordance with AEC-Q100 Grade 1

Applications

• Partial power-down mode operation
• Automotive electronic systems
• Interfacing low-voltage nodes such as 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V

Procurement Notes

Verify the specific package variant, as the DC suffix denotes the VSSOP-8 package. Confirm that the required temperature range aligns with the -40 °C to +125 °C specification. Ensure system designs account for the separate supply rails VCC(A) and VCC(B). Check for compliance with relevant automotive standards if deployed in vehicle electronics.

Selection Notes

Select this component when interfacing circuits operating at different voltage levels within the 1.2 V to 5.5 V range. The LVCH family provides active bus hold functionality, unlike the standard LVC version. Consider the VSSOP-8 package dimensions for PCB layout constraints. Verify that the DIR pin logic requirements match the system control signals.

Part Context

This part belongs to the Nexperia 74LVC/LVCH2T45-Q100 family of dual supply translating transceivers. It shares functional similarities with the 74LVC2T45-Q100 but includes active bus hold circuitry. The device is designed for automotive applications requiring high reliability and robust performance across wide temperature ranges.

Replacement Considerations

The 74LVC2T45DC-Q100H serves as a direct functional replacement, differing only by the absence of active bus hold circuitry.