74AVC1T45DW-7 Voltage Level Translator Specifications and Applications

ElecSuppliers Part Number GuideSep 26, 2026

74AVC1T45DW-7 is a single-bit dual-supply translating transceiver from Diodes Incorporated. It is designed to transfer one logic signal between two voltage domains that may operate at different supply levels.

The device has separate VCCA and VCCB supply inputs, allowing the A-side and B-side signal levels to follow their respective supply voltages. A dedicated DIR pin controls the direction of data transfer.

The 74AVC1T45 family is intended for low-voltage digital systems where different logic supply levels need to communicate without using a larger multi-channel translator.

74AVC1T45DW-7 Electrical Characteristics

The VCCA and VCCB supply voltage ranges are both 1.2V to 3.6V. This allows the device to translate signals between a variety of low-voltage logic domains.

The device provides ±12mA output drive at 3.3V and has typical input hysteresis of approximately 100mV. Inputs can accept voltages up to 4.6V under the specified conditions.

The translator also incorporates I/OFF functionality for partial-power-down operation. When one supply domain is powered down, the corresponding signal path can be isolated to reduce unwanted current flow between the two voltage domains.

74AVC1T45DW-7 Direction Control

The DIR pin determines the direction of communication between the A and B signal pins. When DIR is low, the A side functions as the input and the B side functions as the output. When DIR is high, the direction is reversed.

This simple direction-control architecture makes the device suitable for applications where a single digital signal needs to operate in either direction depending on the system state.

The DIR control signal is referenced to VCCA, so the logic design should take the A-side supply voltage into account when determining the appropriate control signal levels.

74AVC1T45DW-7 Three-State Output

The 74AVC1T45DW-7 uses three-state outputs, allowing the signal path to enter a high-impedance condition under power-down or inactive conditions.

This feature is useful in systems where multiple devices share signal lines or where one voltage domain may be switched off while another part of the system remains active.

Power-off isolation can help prevent unwanted loading and backflow current from an active voltage domain into a powered-down circuit.

74AVC1T45DW-7 Package

The 74AVC1T45DW-7 is supplied in a SOT-363 package. The package is a six-pin surface-mount configuration designed for compact PCB layouts.

The six pins provide connections for VCCA, GND, A, B, DIR, and VCCB. Because the device is intended for compact digital systems, the SOT-363 package can be useful where board space is limited.

The manufacturer also offers the 74AVC1T45 family in several alternative package configurations. However, the DW-7 suffix specifically identifies the SOT-363 version with tape-and-reel packaging.

74AVC1T45DW-7 Operating Temperature

The specified operating temperature range for the 74AVC1T45DW-7 is -40°C to +85°C. This range makes the device suitable for many consumer, computing, communications, and industrial electronic designs.

When used in equipment exposed to higher ambient temperatures, engineers should evaluate the complete thermal conditions of the PCB and verify the limits of the specific application.

74AVC1T45DW-7 Applications

74AVC1T45DW-7 can be used in digital systems that require communication between different low-voltage logic domains. Typical applications include mobile devices, tablets, computers, networking equipment, routers, gateways, storage systems, displays, cameras, navigation equipment, and other embedded electronics.

The device can also be used for control signals, interface lines, power-down signals, and other single-bit digital connections where voltage levels differ between two circuit sections.

74AVC1T45DW-7 Voltage Translation

A common application is translating a signal between two logic systems such as 1.8V and 3.3V. VCCA can be connected to the lower-voltage domain while VCCB is connected to the higher-voltage domain.

The actual logic levels depend on the supply voltage of each side. Since both supply inputs can operate from 1.2V to 3.6V, the same device can support different voltage combinations without requiring a separate fixed-ratio translator.

For bidirectional applications, the DIR input provides direct control over which side operates as the source and which side operates as the receiving side.

74AVC1T45DW-7 PCB Design Considerations

Good PCB layout is important when using a high-speed voltage translator. VCCA and VCCB should each have appropriate local bypass capacitors placed close to the device supply pins.

Signal traces should be kept reasonably short, particularly when the translator is used for fast digital signals. Ground connections should also provide a low-impedance return path.

Engineers should consider the voltage levels of both connected devices, the direction-control logic, signal frequency, capacitive loading, and the required propagation delay when selecting the translator for a specific design.

74AVC1T45DW-7 Propagation Delay

The 74AVC1T45 family is designed for fast low-voltage logic translation. Published product information lists a typical propagation delay of approximately 2.8ns for the DW-7 version.

Actual propagation delay depends on supply voltage, signal direction, load capacitance, operating temperature, and other circuit conditions. Timing should therefore be evaluated using the manufacturer's electrical specifications rather than relying on the typical value alone.

74AVC1T45DW-7 Sourcing

When purchasing 74AVC1T45DW-7, buyers should confirm the complete manufacturer part number and package designation. The 74AVC1T45 family includes several package variants that share the same basic translator function but have different package codes.

For production procurement, the required quantity, packaging format, target delivery date, and acceptable date code should be specified when applicable. Buyers should also confirm whether the requirement is for original manufacturer stock, authorized distribution, or other approved sourcing channels.

74AVC1T45DW-7 for Embedded Electronics

74AVC1T45DW-7 provides a compact solution for connecting one digital signal between two low-voltage power domains. Its dual-supply architecture, bidirectional operation, three-state outputs, partial-power-down support, and SOT-363 package make it suitable for compact embedded electronic designs.

For a new design, engineers should verify the two supply voltages, signal direction, output loading, timing requirements, and power-down behavior before selecting the device for production.