SN74LVC8T245PWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC8T245PWR 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 three-state outputs controlled by DIR and OE inputs. It supports partial-power-down mode via Ioff and includes VCC isolation to disable outputs if either supply drops below 100mV.

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 enables either supply rail to be powered on or off in any order
• Ioff supports partial-power-down mode operation by disabling I/O output circuits to prevent backflow current
• VCC isolation feature disables all I/O outputs when either supply input is below 100mV or left floating

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the package type matches the required footprint, as the SN74LVC8T245 series is available in multiple packages including SSOP, TVSOP, and VQFN. Confirm that the specific ordering suffix corresponds to the desired tape-and-reel quantity and packaging format. Ensure the component meets the required operating temperature range of -40°C to 85°C for the intended application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems operating at different interface voltages requiring bidirectional translation between 1.65V and 5.5V. It is suitable for asynchronous communication between two data buses. Consider the balanced high-drive CMOS push-pull outputs for fast edges into light loads. Ensure unused I/Os are tied to GND to minimize power consumption and prevent floating inputs.

Buffers, Drivers, Receivers, Transceivers Part Context

The SN74LVC8T245 belongs to the Texas Instruments SN74LVC8T245 family of 8-bit translating transceivers. This family provides configurable voltage translation across various logic families. The PWR suffix specifically denotes the TSSOP-24 package variant. Other variants in the family include DB (SSOP), DGV (TVSOP), and RHL (VQFN) packages, offering flexibility for different board space and thermal requirements.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC8T245PW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle partial-power-down scenarios?

The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. Inputs and outputs enter a high-impedance state.

What happens if one of the supply rails is disconnected?

If either VCC input is below 100mV or left floating, all I/O outputs are disabled and become high-impedance state due to the VCC isolation feature.