74LVCH2T45DC,125

Overview

The Nexperia 74LVCH2T45DC,125 is a dual-bit translating transceiver with 3-state outputs in an 8-pin VSSOP package. It supports bidirectional level translation between independent supply voltages VCC(A) and VCC(B), both ranging from 1.2 V to 5.5 V. The device features active bus hold circuitry for unused inputs and IOFF circuitry for partial power-down applications. It operates within a temperature range of -40 °C to +125 °C.

Feature Summary

• Active bus hold circuitry maintains valid logic levels on floating or unused data inputs
• IOFF circuitry disables outputs to prevent damaging backflow current during partial power-down
• Suspend mode activates when either supply voltage reaches GND level, placing ports in high-impedance state

Applications

• Bidirectional level translation between mixed low-voltage nodes
• Partial power-down applications requiring isolation
• Systems utilizing independent A and B port supply domains

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the LVCH designation aligns with the need for active bus hold functionality compared to standard LVC variants. Ensure the DC package type corresponds to the intended PCB layout requirements.

Selection Notes

Select this component when independent dual-supply operation is required for bidirectional data transfer. The LVCH series provides necessary input holding capabilities absent in the base LVC version. Verify that the 3-state output configuration meets system bus control requirements.

Part Context

This part belongs to the 74LVC/LVCH family of translating transceivers. It shares functional similarities with the 74LVC2T45 but includes active bus hold features. The DC suffix indicates the VSSOP8 plastic very thin shrink small outline package (SOT765-1).

Replacement Considerations

The 74LVC2T45DC,125 serves as a direct substitute if active bus hold functionality is not required.