SN74AVC4T245BQBR

Translators, Level Shifters Overview

The SN74AVC4T245BQBR is a 4-bit dual-supply noninverting bus transceiver with configurable voltage-level shifting and 3-state outputs. It utilizes separate VCCA (1.2V to 3.6V) and VCCB (1.2V to 3.6V) power rails for universal bidirectional translation between low-voltage nodes. The device supports maximum data rates up to 380Mbps during 1.8V to 3.3V translation. I/Os are 4.6V tolerant, and the Ioff feature enables partial power-down mode operation.

Translators, Level Shifters Feature Summary

• Fully configurable dual-rail design allows each port to operate over the full 1.2V to 3.6V power-supply range
• I/Os are 4.6V tolerant for interfacing with higher voltage systems
• Ioff circuitry disables outputs to prevent backflow current during partial power-down
• Control input logic levels are referenced to the VCCA supply voltage

Translators, Level Shifters Applications

• Personal electronics
• Industrial applications
• Enterprise systems
• Telecommunications equipment

Translators, Level Shifters Procurement Notes

Verify the specific BQB package variant against the target PCB footprint dimensions. Confirm that the system power sequencing aligns with the OE pull-up requirements to ensure proper high-impedance state during power transitions. Validate electrical characteristics against the recommended operating conditions table in the datasheet.

Translators, Level Shifters Selection Notes

Select this component when asynchronous communication between two data buses requires independent voltage domains. Ensure the application operates within the specified 1.2V to 3.6V range for both ports. Consider the 4.6V I/O tolerance if connecting to external circuits exceeding the local supply voltage.

Translators, Level Shifters Part Context

This device belongs to the Texas Instruments SN74AVC4T245 family of 4-bit bus transceivers. The family provides versatile level-shifting capabilities across various surface-mount packages including SOIC, TSSOP, WQFN, UQFN, and SOT configurations. The BQB suffix specifically denotes the WQFN package type used in this part number.

Translators, Level Shifters Replacement Considerations

SN74AVC4T245DT

Translators, Level Shifters FAQ

How does the Ioff feature function?

The Ioff circuitry disables the output circuits when the device is in partial-power-down mode, preventing damaging current backflow through the device.

What determines the direction of data transmission?

Data transmission direction is controlled by the DIR input; a high level on DIR activates B-port outputs for A-to-B transmission, while a low level activates A-port outputs for B-to-A transmission.