74AVC1T45DW-7

Overview

The 74AVC1T45DW-7 is a single-bit dual power supply translating transceiver with 3-state outputs manufactured by Diodes Incorporated. It operates within a voltage range of 1.2V to 3.6V on both VCCA and VCCB domains. The device features a propagation delay of 2.8 ns, a maximum operating temperature of +85°C, and a typical supply current of 20 uA. Packaged in SOT-363-6, it supports bidirectional data transmission controlled by a DIR pin referenced to VCCA.

Feature Summary

• Dual independent power supplies allow universal low-voltage translation between any voltages from 1.2V to 3.6V.
• Direction control pin manages signal flow direction relative to the VCCA domain.
• IOFF feature ensures high-impedance state during partial-power-down mode to prevent backflow currents.
• High noise immunity provided by typical 100mV hysteresis on inputs.

Applications

• Voltage level translation between logic types operating at different voltages
• Power down signal isolation for disconnected voltage domains
• Portable electronics such as cell phones, tablets, and e-readers

Procurement Notes

Verify the package code DW corresponds to the SOT363 configuration required for your PCB layout. Confirm that the -7 suffix indicates tape and reel packaging compatible with automated assembly equipment. Ensure design specifications align with the 1.2V to 3.6V operating voltage limits defined in the datasheet.

Selection Notes

Select this component when interfacing two distinct voltage domains requiring a single bidirectional channel. The SOT363 package offers a compact footprint suitable for space-constrained designs. Consider the 2.8 ns propagation delay for timing-sensitive applications within the specified temperature range.

Part Context

This part belongs to the 74AVC1T45 family of translating transceivers designed for low-voltage digital systems. It provides a robust solution for connecting logic circuits operating across varying power rails while maintaining electrical isolation during power-down states.

Replacement Considerations

The 74AVC1T45W6-7 serves as a direct functional replacement utilizing the SOT26 package instead of SOT363. Verify pin compatibility and thermal resistance differences before substituting packages within the same logical family.

FAQ

How does the IOFF feature function?

The IOFF feature forces the output into a high-impedance state when either VCCA or VCCB drops to 0V, preventing damaging backflow currents and providing electrical isolation up to 3.6V.

What determines the direction of data transfer?

The DIR pin controls the direction; a high logic level makes Pin A the input and Pin B the output, while a low level reverses these roles.