SN74LVC8T245DBRG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC8T245DBRG4 is an eight-bit non-inverting bus transceiver with configurable dual power supply rails, enabling bidirectional voltage level translation. It operates over a full 1.65V to 5.5V range for both VCCA and VCCB ports. The device supports asynchronous communication between two data buses using DIR and OE control inputs. It features glitch-free power supply sequencing, VCC isolation, and Ioff support for partial-power-down mode. The component is housed in a 24-pin SSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• 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
• VCC isolation feature disables all I/O outputs when either supply drops below 100mV or floats
• Ioff circuitry prevents damaging current backflow through the device during partial-power-down applications

Buffers, Drivers, Receivers, Transceivers Applications

• Personal electronics: sound bar, flat-panel monitor
• Industrial: PLC controller, CNC controller, ultrasound scanner
• Enterprise computing and network attached storage
• Telecom: data center switch, baseband unit

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'G4' corresponds to the RoHS-compliant variant as indicated by manufacturer documentation. Confirm the package type matches the required PCB footprint, specifically the 24-pin SSOP configuration. Ensure that the application environment remains within the specified -40°C to 85°C operating temperature range. Validate that input signals do not exceed the absolute maximum ratings defined in the datasheet to prevent permanent damage.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems requiring bidirectional translation between any standard voltage nodes from 1.65V to 5.5V. The device is suitable for designs needing robust power sequencing without strict ramp order requirements. Consider its high drive capability for driving larger currents, but ensure routing and load conditions are managed to prevent signal ringing. Verify compatibility with partial-power-down modes if system power management requires minimizing leakage currents.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LVC8T245 family of 8-bit dual-supply bus transceivers. The 'DBR' suffix indicates the SSOP-24 package and reel packaging format, while 'G4' denotes compliance with environmental standards. Texas Instruments manufactures this series to address voltage level mismatches between devices operating at different logic levels, providing a versatile solution for modern mixed-voltage digital interfaces.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC8T245DBQ

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle power supply sequencing?

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

What happens if one of the supply voltages drops below 100mV?

If either VCC input is below 100mV or left floating, the VCC isolation feature disables all I/O outputs, placing them in a high-impedance state to prevent unintended behavior.