SN74LVC1T45DBVTG4

Translators, Level Shifters Overview

The SN74LVC1T45DBVTG4 is a single-bit dual-supply bus transceiver from Texas Instruments, designed for low-voltage bidirectional voltage level translation. It operates with supply voltages ranging from 1.65V to 5.5V on both ports, enabling conversion between 1.8V, 2.5V, 3.3V, and 5V nodes. The device features configurable direction control via the DIR input referenced to VCCA. It supports data rates up to 420 Mbps at 3.3V to 5V transitions and includes Ioff circuitry for partial power-down protection. Packaged in a compact SOT-23-6 surface-mount format, it ensures high impedance when either supply is grounded.

Translators, Level Shifters Feature Summary

• Configurable dual-rail design allows independent operation of A and B ports across the full 1.65V to 5.5V range
• Ioff support disables outputs during power-down to prevent damaging current backflow
• VCC isolation function forces both ports to high-impedance state if any supply input is at ground

Translators, Level Shifters Applications

• Asynchronous communication between two data buses operating at different logic levels
• Low-voltage bidirectional translation between 1.8V, 2.5V, 3.3V, and 5V voltage nodes
• Partial power-down mode applications requiring output isolation during power loss

Translators, Level Shifters Procurement Notes

Verify the G4 suffix indicates RoHS compliance and lead-free manufacturing status per Texas Instruments documentation. Confirm the DBVT package variant corresponds to the SOT-23-6 tape and reel configuration. Ensure the specific revision matches the required ESD protection ratings and propagation delay specifications for the target application environment.

Translators, Level Shifters Selection Notes

Select this component when a single-channel bidirectional translator is required for mixed-voltage systems. The LVC family offers compatibility with CMOS and TTL inputs while maintaining low power consumption. The SOT-23-6 package is suitable for space-constrained designs. Verify that the maximum data rate requirements align with the specific voltage transition scenarios, as performance varies between 1.8V and 5V interfaces.

Translators, Level Shifters Part Context

This part belongs to the SN74LVC1T45 series of single-bit dual-supply bus transceivers. The G4 suffix denotes a Green/RoHS-compliant version manufactured by Texas Instruments. It shares functional characteristics with the standard SN74LVC1T45DBVT but adheres to stricter environmental standards. The device is part of the broader LVC logic family, optimized for low-voltage digital applications.

Translators, Level Shifters Replacement Considerations

SN74LVC1T45DBVR serves as a pin-compatible alternative within the same series. SN74LVC1T45DRLR offers the same functionality in an X2SON-6 package. SN74AVC1T45 variants provide similar features with potentially different speed or drive characteristics.