74AVCH1T45GW,125

Overview

The Nexperia 74AVCH1T45GW,125 is a single-bit dual-supply voltage level translator and transceiver housed in a TSSOP6 (SOT363-2) package. It supports bidirectional data translation with supply voltages ranging from 0.8 V to 3.6 V on both ports A and B. The device features active bus hold circuitry to maintain valid logic levels on floating inputs, eliminating the need for external pull-up or pull-down resistors. It includes IOFF circuitry for partial power-down applications, disabling outputs to prevent backflow current when powered down. The component operates within an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Active bus hold circuitry maintains unused or floating data inputs at valid logic levels without external components.
• IOFF circuitry enables partial power-down mode by disabling outputs to prevent damaging backflow current.
• Dynamically controlled outputs support high noise immunity and low power dissipation characteristics.
• Overvoltage tolerant inputs allow operation in mixed voltage environments up to 3.6 V.

Applications

• Bidirectional logic level-shifting between systems operating at different voltage domains
• Unidirectional logic level-shifting applications requiring specific direction control
• Partial power-down scenarios where output isolation during power loss is required

Procurement Notes

Verify the ordering suffix '125' corresponds to the standard tape and reel packaging format specified by Nexperia for this part number. Confirm that the TSSOP6 package variant matches the design footprint requirements. Ensure the selected component meets the required thermal derating specifications for the intended operating temperature range up to +125 °C. Cross-reference the marking code K5 with the physical device to ensure authenticity.

Selection Notes

Select this component when a single-channel bidirectional translator is needed with integrated bus hold functionality. It is suitable for designs requiring dynamic direction control via the DIR pin rather than auto-direction sensing. Consider the TSSOP6 package constraints regarding body width and lead pitch. Verify that the maximum data rate requirements align with the specific voltage translation pairs supported by the AVCH series.

Part Context

This device belongs to the 74AVCH logic family, designed for advanced CMOS technology with low power consumption. It serves as a specialized interface solution for connecting digital systems with varying supply voltages. The inclusion of IOFF makes it distinct from standard transceivers by supporting safe power sequencing. It complements other level shifters by offering explicit direction control alongside automatic translation capabilities.

Replacement Considerations

Check for direct substitutes within the 74AVCH1T45 series such as the GM or GN variants if package compatibility allows. Verify functional equivalence regarding bus hold strength and IOFF leakage currents when considering alternative manufacturers. Ensure any replacement maintains the same DIR pin functionality and voltage tolerance limits.