74AVC1T45FX4-7

Overview

The 74AVC1T45FX4-7 is a single-bit dual power supply translating transceiver with tri-state outputs manufactured by Diodes Incorporated. It facilitates logic level translation between voltage domains ranging from 1.2V to 3.6V on both VCCA and VCCB rails. The device features a direction control pin (DIR) referenced to VCCA, allowing data flow configuration between pins A and B. It operates within an ambient temperature range of -40°C to +85°C and utilizes the X2-DFN1409-6 package.

Feature Summary

• Supports universal low-voltage translation across independent 1.2V to 3.6V power domains
• Provides partial-power-down isolation via IOFF feature when either supply voltage is zero
• Includes high noise immunity with typical 100mV hysteresis on inputs
• Offers robust ESD protection exceeding JESD standards for machine, human body, and charged device models

Applications

• Voltage level translation joining logic types operating at different voltages
• Power down signal isolation preventing loading on signal lines when a domain is off
• Portable electronics such as cell phones, tablets, and e-readers
• Computing peripherals including PCs, notebooks, and hard drives
• Networking equipment like routers, gateways, and set-top boxes

Procurement Notes

Verify the FX4 suffix corresponds to the X2-DFN1409-6 package rather than the standard FZ4 X2-DFN1410-6 variant. Confirm RoHS compliance and lead-free status requirements match project specifications. Ensure thermal resistance characteristics of the specific package are considered for the target application environment.

Selection Notes

Select this component for applications requiring bidirectional translation between dissimilar voltage domains within the 1.2V to 3.6V range. The DIR pin allows flexible data path control. Consider the X2-DFN1409-6 footprint constraints during PCB layout. Verify that input voltage limits do not exceed absolute maximum ratings under all operating conditions.

Part Context

This part belongs to the 74AVC1T45 family of translating transceivers designed for low-voltage digital interfaces. It serves as a bridge between logic families operating at different supply levels. The FX4 designation specifically identifies the X2-DFN1409-6 chip-scale packaging option, distinguishing it from other package variants in the same functional series.

Replacement Considerations

The 74AVC1T45FZ4-7 is a direct replacement using the X2-DFN1410-6 package. Other package alternatives include 74AVC1T45DW-7 (SOT-363) and 74AVC1T45W6-7 (SOT-26). Verify pinout compatibility and physical footprint dimensions before substituting.