74AVCH2T45DC,125

Overview

The Nexperia 74AVCH2T45DC,125 is a dual-bit, dual-supply voltage level translator and transceiver housed in an 8-lead VSSOP (SOT765-1) package. It supports bidirectional data translation between ports A and B with independent supply voltages ranging from 0.8 V to 3.6 V. The device features a direction control input (DIR), 3-state outputs, and IOFF circuitry for partial power-down applications. It operates within a temperature range of -40 °C to +125 °C.

Feature Summary

• Enables bidirectional voltage level translation between two independent low-voltage domains.
• Includes IOFF circuitry to disable outputs and prevent backflow current during partial power-down.
• Integrates active bus hold circuitry to maintain valid logic levels on floating inputs without external resistors.

Applications

• Bidirectional logic level-shifting between systems operating at different voltage nodes.
• Partial power-down applications requiring isolation of powered-down ports.
• Interfacing low-voltage microcontrollers with peripherals operating at varying supply levels.

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the DC suffix corresponds to the VSSOP8 plastic very thin shrink small outline package. Ensure the temperature grade aligns with system requirements for industrial or extended ranges. Cross-reference the manufacturer part number against official Nexperia documentation to confirm authenticity and revision status.

Selection Notes

Select this component when bidirectional translation between two distinct voltage domains is required within a compact footprint. The dual-supply architecture allows flexible voltage node selection between 0.8 V and 3.6 V. Consider the DIR pin requirement for controlling transmission direction and the absence of a dedicated output enable pin when designing bus arbitration logic.

Part Context

This device belongs to the 74AVCH series of high-speed CMOS logic components manufactured by Nexperia. It is specifically designed as a dual-bit transceiver, distinguishing it from single-bit translators or quad-channel variants. The VSSOP package option provides a space-efficient solution for surface-mount assembly in portable and dense electronic designs.

Replacement Considerations

Other packages within the same logical family, such as 74AVCH2T45GT (XSON8), offer equivalent electrical performance with different physical dimensions. Substitution requires verifying mechanical fit and ensuring the replacement part maintains the same dual-supply voltage range and functional characteristics.