74AVC1T45FW5-7

Overview

The Diodes Incorporated 74AVC1T45FW5-7 is a single-bit dual power supply translating transceiver with 3-state outputs, housed in an X1-DFN1010-6 package. It supports voltage levels from 1.2V to 3.6V on both VCCA and VCCB rails. The device features a direction control pin (DIR) referenced to VCCA that dictates data flow between pins A and B. Key electrical parameters include a typical propagation delay of 2.8 ns at 3.3V, a maximum operating temperature of +85°C, and a low quiescent current of 20 µA. It provides ±12mA output drive capability and includes IOFF functionality for partial-power-down isolation.

Feature Summary

• Dual-supply architecture allows universal translation between any logic voltages within the 1.2V to 3.6V range.
• Direction control pin manages signal flow between input/output ports A and B based on logic state relative to VCCA.
• IOFF feature ensures high-impedance state during power-down to prevent backflow currents and isolate signals.
• High noise immunity with typical hysteresis and robust ESD protection exceeding standard JESD ratings.

Applications

• Voltage level translation between logic types operating at different voltages
• Power down signal isolation to prevent loading on active signal lines
• Connecting mobile devices such as cell phones, tablets, and e-readers
• Networking equipment including routers and gateways
• Computer peripherals like hard drives and optical drives

Procurement Notes

Verify the specific ordering suffix FW5 corresponds to the X1-DFN1010-6 package when sourcing. Confirm RoHS compliance and lead-free status requirements against project specifications. Ensure the tape and reel packaging quantity matches production needs. Check for any recent product change notices regarding marking or material composition updates.

Selection Notes

Select this component when a single bidirectional channel with explicit direction control is required. The X1-DFN1010-6 package offers a compact footprint suitable for space-constrained designs. Ensure the application operates within the specified -40°C to +85°C temperature range. Verify that the 3-state output behavior aligns with system bus requirements during power transitions.

Part Context

This part belongs to the 74AVC1T45 family of translating transceivers manufactured by Diodes Incorporated. The AVC series is designed for low-voltage applications ranging from 1.2V to 3.6V. The FW5 suffix specifically identifies the X1-DFN1010-6 surface-mount package variant within the broader product line.

Replacement Considerations

The datasheet lists the SOT26 package (74AVC1T45W6-7) as a direct chip-scale alternative. Other package variants within the same logical function include FW3, FZ4, and DW. Verify pinout compatibility before substituting with these physical package variations.

FAQ

How does the DIR pin determine signal direction?

The DIR pin is referenced to VCCA. When DIR is high, Pin A acts as the input and Pin B as the output. When DIR is low, the roles reverse, making Pin A the output and Pin B the input.

What is the purpose of the IOFF feature?

IOFF forces the outputs into a high-impedance state when either VCCA or VCCB is at 0V. This prevents damaging backflow currents and provides electrical isolation up to 3.6V during partial power-down modes.

Can the inputs accept voltages higher than VCCA?

Yes, the inputs are designed to accept up to 4.6V, allowing them to interface with higher voltage domains even if the local supply rail is lower.