74AVCH2T45GT,115

Overview

The Nexperia 74AVCH2T45GT,115 is a dual-bit, dual-supply voltage level translator and transceiver housed in an XSON8 package (SOT833-1). It supports bidirectional data transmission between ports A and B with a dedicated direction control input. Both supply pins accept voltages from 0.8 V to 3.6 V, enabling translation between standard low-voltage nodes including 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device features 3-state outputs and operates within an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Supports partial power-down applications via IOFF circuitry that disables outputs to prevent damaging backflow current when supplies are removed.
• Includes active bus hold circuitry on data inputs to maintain valid logic levels for unused or floating lines without external resistors.
• Provides suspend mode functionality where both ports enter a high-impedance OFF-state if either supply pin reaches ground potential.

Applications

• Bidirectional logic level shifting between mixed-voltage systems
• Partial power-down scenarios requiring isolation during power loss
• Interfacing low-voltage microcontrollers with peripheral devices operating at different supply rails

Procurement Notes

Verify the specific ordering suffix matches the required package variant, as the GT designation corresponds to the XSON8 form factor. Confirm the temperature grade aligns with system requirements, noting that this part number specifies operation up to +125 °C. Ensure design compliance with JEDEC standards relevant to the target voltage domains before finalizing procurement specifications.

Selection Notes

Select this component when designing interfaces requiring bidirectional translation between two independent voltage domains within the 0.8 V to 3.6 V range. The integrated bus hold feature simplifies PCB layout by eliminating the need for pull-up or pull-down resistors on data lines. Consider the DIR pin referencing to VCC(A) when determining control signal sourcing requirements for the application.

Part Context

This device belongs to the 74AVCH series of advanced CMOS logic components manufactured by Nexperia. It serves as a specialized interface solution for managing signal integrity across varying supply voltages in complex digital systems. The XSON8 package offers a compact footprint suitable for space-constrained portable electronics and high-density board designs.

Replacement Considerations

The 74AVCH2T45DC and 74AVCH2T45GN are confirmed functional substitutes within the same family. These alternatives provide identical electrical characteristics but utilize different package types, specifically VSSOP8 and XSON8 variants respectively, allowing for mechanical adaptation without changing the core logic function.