NVT4555UK012

Specialized Overview

The NVT4555UK012 is a dual voltage-level translator manufactured by NXP USA Inc., designed for bidirectional voltage translation between different logic families. It operates with an A port supply range of 1.65V to 3.6V and a B port supply range of 2.7V to 5.5V, allowing flexible interfacing between low-voltage and standard CMOS devices. The device features open-drain outputs on the A port and push-pull outputs on the B port, ensuring safe level shifting without back-driving power supplies. Packaged in a compact SOT353 (SC-88) surface-mount format, it supports high-speed data transmission while maintaining low power consumption and minimal signal distortion across its operating temperature range.

Specialized Feature Summary

• Bidirectional voltage translation capability between 1.65V–3.6V and 2.7V–5.5V domains
• Open-drain A-port configuration prevents back-driving of lower-voltage supply rails
• Push-pull B-port output ensures strong drive capability for higher-voltage loads
• Compact SOT353 package design suitable for space-constrained portable electronics

Specialized Applications

• Interfacing low-voltage microcontrollers with 5V peripherals in embedded systems
• Level shifting in I2C and SPI bus networks connecting mixed-voltage components
• Voltage translation in mobile devices and handheld instruments with multi-supply architectures

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status and lot traceability before integration into production. Check for obsolescence notices as NXP may discontinue specific suffix variants. Ensure storage conditions adhere to moisture sensitivity level requirements to prevent package damage during soldering processes.

Specialized Selection Notes

Select this model when bidirectional translation between 1.8V/2.5V/3.3V logic and 3.3V/5V logic is required. The open-drain A-port makes it suitable for pull-up dependent buses like I2C. Avoid if unidirectional translation or simultaneous multi-voltage domain support beyond two ports is needed. Verify input capacitance and propagation delay specifications against target bus speed requirements to ensure signal integrity at maximum operating frequencies.

Specialized Part Context

The NVT4555 belongs to NXP’s NVT series of voltage-level translators, which are widely used in mixed-signal designs. This family includes single, dual, and quad-channel variants with configurable port characteristics. The UK012 suffix typically denotes specific packaging and tape-and-reel configurations for automated assembly. These devices complement other NXP interface solutions such as the NVT4858 for SD card interfaces and provide essential connectivity in heterogeneous system-on-module designs.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers for the NVT4555UK012 are not available in verified documentation. Alternative level shifters from other manufacturers may require circuit redesign due to differences in output topology, supply voltage ranges, or pinout configurations. Consult official NXP documentation for any updated equivalents within the NVT series before considering cross-brand replacements.