SN74LVC2T45DCTRE4

Translators, Level Shifters Overview

The SN74LVC2T45DCTRE4 is a dual-bit bus transceiver featuring configurable voltage-level shifting and three-state outputs. It operates on two independent power rails, VCCA and VCCB, both supporting a range of 1.65V to 5.5V. The device facilitates asynchronous communication between data buses with a maximum data rate of 420Mbps at 3.3V to 5V conversion. It includes an Ioff circuit for partial power-down mode support and offers ESD protection exceeding JESD22 specifications.

Translators, Level Shifters Feature Summary

• Configurable dual-rail design allowing operation across the entire 1.65V to 5.5V supply voltage range
• Direction control input activates specific port outputs to manage bidirectional data flow
• IOFF circuit supports partial power-down mode to prevent backflow current damage
• Vcc isolation ensures high-impedance state when either power input is grounded

Translators, Level Shifters Applications

• Portable electronic devices requiring low-voltage translation
• Industrial systems utilizing mixed voltage logic levels
• Enterprise infrastructure connecting disparate voltage domains
• Telecommunications equipment managing asynchronous bus communication

Translators, Level Shifters Procurement Notes

Verify the DCTR suffix indicates tape-and-reel packaging configuration. Confirm RoHS compliance status matches REACH requirements. Ensure the ordering part number aligns with the specific package variant required for the target PCB footprint. Cross-reference the manufacturer datasheet revision date to validate electrical characteristics against current production standards.

Translators, Level Shifters Selection Notes

Select this component when interfacing buses with different voltage nodes within the 1.65V to 5.5V range. The dual-supply architecture allows A-port tracking of VCCA and B-port tracking of VCCB. Consider the propagation delay and data rate limits relative to the system clock speed. Evaluate the need for partial power-down capabilities if the application requires reduced standby current consumption.

Translators, Level Shifters Part Context

This device belongs to the Texas Instruments LVC logic family, designed for low-voltage CMOS applications. It serves as a bidirectional translator between two independent power domains. The SM8 package provides a compact surface-mount solution suitable for space-constrained designs. It replaces older generation translators by offering wider voltage compatibility and improved ESD robustness.

Translators, Level Shifters Replacement Considerations

SN74LVC2T45DCUR: Pin-compatible alternative in a different package style.

Translators, Level Shifters FAQ

How does the Vcc isolation feature function?

If either VCCA or VCCB is grounded, both ports enter a high-impedance state to protect the circuit.

What is the purpose of the IOFF circuit?

It disables outputs during partial power-down mode to prevent backflow current from damaging the device.