SN74LXC1T45QDCKRQ1

Translators, Level Shifters Overview

The SN74LXC1T45QDCKRQ1 is a single-bit, dual-supply, non-inverting bidirectional voltage level translator from Texas Instruments. It operates with VCCA and VCCB supplies ranging from 1.1 V to 5.5 V. The device supports data rates up to 420 Mbps when translating between 3.3 V and 5.0 V. It features Schmitt-trigger inputs for noise immunity and integrated pull-down resistors on I/O and control pins. The component is AEC-Q100 qualified for automotive applications and functions within an operating temperature range of -40°C to +125°C.

Translators, Level Shifters Feature Summary

• Fully configurable dual-rail design allows independent operation of ports across wide voltage ranges
• Schmitt-trigger inputs provide robust signal integrity against slow or noisy input transitions
• Integrated dynamic pull-down resistors on I/O and static pull-downs on control inputs reduce external component requirements
• VCC isolation and disconnect features ensure high-impedance states during power loss or floating supply conditions

Translators, Level Shifters Applications

• Eliminating slow or noisy input signals in digital circuits
• Driving indicator LEDs or buzzers from low-voltage logic sources
• Debouncing mechanical switches connected to microcontrollers
• General-purpose I/O level shifting between disparate voltage domains

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix matches the required package type, as the SN74LXC1T45-Q1 family includes DRL (SOT), DRY (SON), and DCK (SC70) variants. Confirm that the Q1 suffix aligns with automotive qualification requirements for your target application. Ensure the selected package corresponds to the thermal and physical constraints of your PCB layout design.

Translators, Level Shifters Selection Notes

Select this component when asynchronous communication requires translation between two independently powered voltage rails. It is suitable for designs needing glitch-free power sequencing and partial-power-down support. Consider its high drive strength and Schmitt-trigger inputs if driving capacitive loads or operating in electrically noisy environments compared to standard LVC translators.

Translators, Level Shifters Part Context

This part belongs to the SN74LXC1T45-Q1 family of automotive-grade bus transceivers. It shares functional similarities with other single-bit translators but distinguishes itself through its wide 1.1 V to 5.5 V operating range and specific VCC isolation features. The family is designed to replace older level shifters in modern automotive and industrial systems requiring flexible voltage domain interfacing.

Translators, Level Shifters Replacement Considerations

SN74LXC1T45DRQRQ1

Translators, Level Shifters FAQ

How does the device handle floating control inputs?

The DIR control input includes an integrated static pull-down resistor, which ensures the line defaults to a defined state and prevents floating when not actively driven by an external device.

What happens if one of the VCC supplies is disconnected?

If either VCC supply drops below 100 mV or is disconnected, the VCC isolation feature pulls all I/Os down and places them in a high-impedance state to prevent excessive current flow.