74AVCH2T45GD,125

Overview

The Nexperia 74AVCH2T45GD,125 is a dual-bit, dual-supply voltage level translator and transceiver featuring 3-state outputs. It operates with supply voltages VCC(A) and VCC(B) ranging from 0.8 V to 3.6 V, enabling translation between low-voltage nodes such as 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device includes two data input-output ports (nA and nB), a direction control input (DIR), and supports bidirectional transmission. It is housed in an XSON-8 package (SOT833-1) and functions within an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Bidirectional level translation between any low-voltage nodes within the 0.8 V to 3.6 V supply range
• IOFF circuitry enables partial power-down mode by disabling outputs to prevent backflow current
• Active bus hold circuitry maintains unused or floating data inputs at valid logic levels without external resistors
• High noise immunity with low overshoot and undershoot characteristics less than 10% of VCC

Applications

• Partial power-down applications requiring isolation during suspend modes
• Bidirectional logic level-shifting between mixed-voltage systems
• Unidirectional logic level-shifting for single-direction data transfer

Procurement Notes

Verify the specific ordering suffix GD,125 corresponds to the XSON-8 package (SOT833-1) configuration. Confirm that the required operating temperature range meets the -40 °C to +125 °C specification. Ensure system designs account for the absence of an output enable pin to manage bus contention during direction changes. Check for compliance with relevant JEDEC standards if applicable to the target environment.

Selection Notes

Select this component when designing interfaces between systems operating at different low-voltage levels within the 0.8 V to 3.6 V range. It is suitable for applications requiring bidirectional data flow controlled by a single DIR pin. Consider the XSON-8 package constraints for PCB layout. Verify that the maximum data rate requirements align with the specific voltage translation pairs being used.

Part Context

The 74AVCH2T45 belongs to the AVCH logic family, designed for advanced low-voltage CMOS applications. This series provides high-speed performance with robust ESD protection exceeding 8000 V HBM. The device integrates features like bus hold and IOFF to simplify system design in portable and battery-powered electronics where power management and signal integrity are critical.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.