SN74LXC2T45DCUR

Translators, Level Shifters Overview

The SN74LXC2T45DCUR is a dual-bit, dual-supply noninverting bidirectional voltage level translation device from Texas Instruments. It features configurable dual-rail design allowing each port to operate from 1.1 V to 5.5 V. The A port and DIR control pin are referenced to VCCA logic levels, while the B port is referenced to VCCB logic levels. It supports data rates up to 420 Mbps for 3.3 V to 5.0 V translations. The device includes Schmitt-trigger inputs, integrated dynamic pull-down resistors on I/Os, and static pull-down resistors on control inputs. It offers high drive strength up to 32 mA at 5 V and low power consumption with maximum supply currents of 6 µA across the operating temperature range.

Translators, Level Shifters Feature Summary

• Fully configurable dual-rail design supporting independent voltage operation for both ports
• Robust glitch-free power supply sequencing ensures stable transitions during power-up or power-down
• Integrated dynamic pull-down resistors on I/Os and static pull-down resistors on control inputs reduce external component requirements
• VCC isolation and VCC disconnect (Ioff-float) feature automatically pulls all I/Os high-impedance if either supply drops below 100 mV

Translators, Level Shifters Applications

• Eliminating slow or noisy input signals in digital circuits
• Driving indicator LEDs or buzzers with appropriate voltage levels
• Debouncing mechanical switches for reliable digital input
• Infotainment head unit signal interfacing
• ADAS fusion sensor data communication

Translators, Level Shifters Procurement Notes

Verify the specific package type DCU (VSSOP) matches your PCB footprint requirements. Confirm that the voltage levels on both VCCA and VCCB rails fall within the 1.1 V to 5.5 V operational range. Ensure ESD protection measures are adequate as the device exceeds JESD 22 standards but requires proper handling. Check for any specific thermal management needs given the junction-to-ambient resistance values for the VSSOP package.

Translators, Level Shifters Selection Notes

Select this component when bidirectional level shifting between two independently powered domains is required. It is suitable for applications needing high drive strength and robust noise immunity due to Schmitt-trigger inputs. Consider the DCU package size constraints and ensure the DIR pin can be properly controlled by the VCCA domain logic. Verify compatibility with existing LVC family designs if migrating from previous generations.

Translators, Level Shifters Part Context

This device belongs to the SN74LXC2T45 family of dual-supply bus transceivers. It is part of Texas Instruments' broader portfolio of logic ICs designed for versatile voltage translation tasks. The DCUR suffix indicates the VSSOP-8 package variant, which is optimized for surface-mount assembly. It serves as a bridge between different voltage domains in complex electronic systems requiring asynchronous communication.

Translators, Level Shifters Replacement Considerations

SN74LXC2T45DCU is the leaded equivalent in the same VSSOP-8 package form factor. SN74LXC2T45DTMR is available in an X2SON-8 package for smaller footprints. SN74LXC2T45-Q1DCURQ1 is the automotive-grade version compliant with AEC-Q100 standards.