74AVC4T3144GU12X

Overview

The Nexperia 74AVC4T3144GU12X is a 4-bit dual-supply level translating buffer with 3-state outputs, housed in an XQFN12 package. It translates three inputs from VCC(A) to VCC(B) and one input from VCC(B) to VCC(A). Operating voltages for both supplies range from 0.8 V to 3.6 V. Maximum data rates reach 380 Mbit/s for translations between 1.8 V and 3.3 V. The device supports partial power-down via IOFF circuitry and enters suspend mode when either supply is at GND.

Feature Summary

• Provides asymmetric translation capabilities with three channels moving signals from the A domain to the B domain and one channel moving signals from the B domain to the A domain.
• Incorporates IOFF circuitry to disable outputs during partial power-down, preventing damaging backflow currents through the device.
• Features a dedicated suspend mode that forces all outputs into a high-impedance OFF-state whenever either VCC(A) or VCC(B) drops to ground potential.

Applications

• Connecting mixed-voltage logic domains within embedded systems
• Interfacing low-voltage processors with higher-voltage peripheral buses
• Level shifting in portable battery-operated devices requiring power management

Procurement Notes

Verify the specific ordering suffix GU12X corresponds to the XQFN12 (SOT1174-1) package variant. Confirm the temperature range requirement matches the -40 °C to +125 °C specification provided in the datasheet. Ensure design compatibility with the 3.6 V maximum input voltage rating for all signal lines.

Selection Notes

Select this component when asymmetric bidirectional level translation is required within a single package. It is suitable for designs needing independent supply rails for input and output domains. Consider the low leakage characteristics and high ESD protection ratings for robust operation in sensitive environments.

Part Context

This part belongs to the 74AVC series of advanced CMOS logic devices designed for low-voltage applications. The 74AVC4T3144 specifically addresses the need for efficient voltage translation between different logic families operating at distinct supply levels without requiring external components.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family, such as the automotive-grade 74AVC4T3144GU12-QX, if extended reliability standards are required for the application environment.

FAQ

How does the device handle partial power-down conditions?

The integrated IOFF circuitry automatically disables the outputs when a supply rail is powered down, effectively blocking any reverse current flow that could damage the device or interfere with other active circuits.

What triggers the suspend mode in this translator?

Suspend mode is activated when either the VCC(A) or VCC(B) supply voltage falls to the GND level. In this state, all outputs transition to a high-impedance OFF-state regardless of the input signals.