SN74LVC8T245DBQR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC8T245DBQR is an 8-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It operates within a supply voltage range of 1.65V to 5.5V on both VCCA and VCCB rails. The device supports bidirectional data transmission controlled by DIR and OE signals, enabling asynchronous communication between buses operating at different logic levels.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Fully configurable dual-rail design allows each port to operate over the full 1.65V to 5.5V power-supply range
• Robust, glitch-free power supply sequencing ensures reliable operation during power transitions
• Ioff circuitry supports partial-power-down mode by disabling outputs to prevent damaging current backflow
• VCC isolation feature disables all I/O outputs when either supply input falls below 100mV or remains floating

Buffers, Drivers, Receivers, Transceivers Applications

• Personal electronics such as sound bars and flat-panel monitors
• Industrial controllers including PLCs, CNC systems, and ultrasound scanners
• Enterprise computing and network-attached storage systems
• Telecom infrastructure like data center switches and baseband units

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the DBQR suffix corresponds to the SSOP-24 package variant with dimensions of 8.65mm by 6mm. Confirm compliance with RoHS standards and ensure the component meets the specified -40°C to 85°C operating temperature range for your specific application environment before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems requiring bidirectional level translation between any combination of 1.8V, 2.5V, 3.3V, and 5V nodes. Ensure control inputs DIR and OE are referenced to VCCA and that unused I/O pins are tied to a valid logic level to minimize power consumption and prevent undefined states.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74LVC8T245 family of 8-bit translating transceivers. It is designed for asynchronous communication between two data buses, providing non-inverting signal transmission. The family supports universal low-voltage bidirectional translation across multiple standard voltage nodes.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC8T245DBR (SSOP-24)

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle power supply sequencing?

The SN74LVC8T245 features robust, glitch-free power supply sequencing, allowing either supply rail to be powered on or off in any order without producing glitches on the I/Os.

What happens if one supply voltage drops below 100mV?

If either VCC input is below 100mV or left floating while the other supply is active, all I/O outputs are disabled and enter a high-impedance state.