SN74LVC2T45DCTTG4

Translators, Level Shifters Overview

The SN74LVC2T45DCTTG4 is a dual-bit, bidirectional voltage-level translating bus transceiver from Texas Instruments. It supports independent configurable power supply rails ranging from 1.65V to 5.5V on both ports. The device facilitates asynchronous communication between two data buses with varying voltage levels. Key electrical parameters include a maximum propagation delay of 4.4ns at VCCA = 3.3V and an output drive capability of ±24mA. It operates within a temperature range of -40°C to +85°C and utilizes an SM-8 surface-mount package.

Translators, Level Shifters Feature Summary

• Dual-port design allowing independent voltage configuration for each port
• Bidirectional data transfer controlled by a single direction pin
• Supports partial power-down mode via Ioff circuitry to prevent backflow current
• VCC isolation feature ensures high-impedance state if either supply rail is grounded

Translators, Level Shifters Applications

• Personal electronics requiring low-voltage level translation
• Industrial control systems utilizing mixed voltage logic
• Enterprise infrastructure equipment
• Telecommunications network devices

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free manufacturing status as per Texas Instruments standards. Confirm the package type corresponds to the SM-8 (SSOP/MSOP) footprint required for the target PCB layout. Ensure the ordering part number matches the exact revision and tape-and-reel specifications needed for automated assembly processes.

Translators, Level Shifters Selection Notes

Select this component when interfacing logic families operating at different voltage nodes, such as 1.8V to 3.3V or 3.3V to 5V. The LVC series offers lower power consumption compared to older technologies while maintaining adequate speed for most digital interfaces. Consider the bidirectional nature of the transceiver for half-duplex communication lines where signal flow direction must be dynamically managed by the DIR input.

Translators, Level Shifters Part Context

This device belongs to the SN74LVC2T45 family of dual-supply bus transceivers. It is designed specifically for applications requiring flexible voltage translation between disparate logic domains. The product line emphasizes low power operation and compact packaging solutions suitable for space-constrained modern electronic designs.

Translators, Level Shifters Replacement Considerations

SN74LVC2T45DCTR

Translators, Level Shifters FAQ

How does the VCC isolation feature function?

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

What is the purpose of the Ioff support?

Ioff allows the outputs to be disabled during partial power-down mode, preventing damaging backflow currents through the supply rails.