74LVC8T245RHLRG4

Overview

The SN74LVC8T245RHLRG4 is an eight-bit non-inverting bus transceiver with configurable dual power supply rails enabling bidirectional voltage level translation. It operates with VCCA and VCCB set between 1.65V and 5.5V, supporting universal low-voltage translation between 1.8V, 2.5V, 3.3V, and 5V nodes. The device features glitch-free power supply sequencing, Ioff for partial-power-down mode, and a VCC isolation feature that disables outputs if either supply drops below 100mV. It utilizes a 24-pin VQFN package (5.5mm x 3.5mm) and supports an operating temperature range from -40°C to 85°C.

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 enables either supply rail to be powered on or off in any order
• Ioff circuitry supports partial-power-down mode operation by disabling outputs to prevent damaging current backflow
• VCC isolation feature ensures all I/O outputs enter a high-impedance state if either VCC input falls below 100mV

Applications

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

Procurement Notes

Verify the specific ordering suffix RHLRG4 corresponds to the required RoHS compliance and tape-and-reel packaging configuration. Confirm the component matches the Texas Instruments SN74LVC8T245 family specifications regarding the 24-pin VQFN package dimensions and thermal pad requirements. Ensure the procurement source provides valid traceability documentation consistent with TI production standards.

Selection Notes

Select this component when interfacing asynchronous communication buses requiring bidirectional translation between varying logic levels within the 1.65V to 5.5V range. It is suitable for designs needing robust power sequencing without ramp order constraints. Consider the 24-pin VQFN package for space-constrained PCB layouts requiring efficient thermal dissipation through the exposed thermal pad.

Part Context

This part belongs to the SN74LVC8T245 series of 8-bit dual-supply bus transceivers manufactured by Texas Instruments. The RHL suffix identifies the specific 24-pin Very Thin Quad Flat No-Lead (VQFN) package variant measuring 5.5mm by 3.5mm. The G4 suffix indicates lead-free construction and environmental compliance. This series is optimized for universal low-voltage bidirectional translation across standard digital logic voltage nodes.

Replacement Considerations

Direct functional substitutes within the same package include SN74LVC8T245DB, SN74LVC8T245PW, and SN74LVC8T245DGV. Verify pin compatibility and thermal characteristics when substituting different package types such as SSOP or TSSOP variants.