NXS0506UPZ

Translators, Level Shifters Overview

The NXS0506UP is an SD 3.0-compatible bidirectional dual supply level translator with auto-direction control, EMI filter, and ESD protection. It interfaces memory cards (1.7 V to 3.6 V) with hosts (1.1 V to 1.95 V). Supported modes include SDR104 (208 MHz), SDR50, DDR50, SDR25, SDR12, High-Speed (50 MHz), and Default-Speed (25 MHz). The device operates from -40 °C to +85 °C. It features integrated pull-up resistors (typical 70 kΩ) and series resistors (22.5 Ω host, 15 Ω card side). Supply currents are typically 4 µA (host) and 7 µA (card). Propagation delays range from 1.6 ns to 5.8 ns depending on voltage levels.

Translators, Level Shifters Feature Summary

• Auto-direction sensing eliminates the need for explicit direction control signals by automatically detecting data flow between host and card.
• Integrated EMI filters suppress higher harmonics of digital I/Os to reduce interference with sensitive mobile communication systems.
• Robust ESD protection architecture discharges stress to ground via the voltage translator, keeping ESD stress away from the host circuitry.
• Built-in pull-up resistors remove the requirement for external components, simplifying PCB layout and reducing part count.

Translators, Level Shifters Applications

• Smartphone memory card interfaces
• Mobile handset storage solutions
• Digital camera card readers
• Tablet PC and laptop computer SD/MMC slots

Translators, Level Shifters Procurement Notes

Verify the specific package suffix matches the design requirement: UP denotes WLCSP16 (SOT8025-1) while GU denotes XQFN16 (SOT1161-1). Confirm that the host supply voltage remains within the 1.1 V to 1.95 V range and the card supply stays between 1.7 V and 3.6 V. Ensure PCB layout guidelines for the chosen package type are followed to maintain signal integrity at high clock rates.

Translators, Level Shifters Selection Notes

Select this component when interfacing low-voltage hosts (1.1 V–1.95 V) with standard or high-speed SD cards requiring voltage translation up to 3.6 V. It is suitable for designs needing integrated EMI suppression and robust ESD protection without external discrete components. Consider the WLCSP16 package for minimal footprint or XQFN16 for alternative mounting needs. Verify compatibility with SD 3.0 signaling modes if operating above 50 MHz.

Translators, Level Shifters Part Context

The NXS0506UP is the WLCSP16 variant of the NXS0506 family, which also includes the NXS0506GU in an XQFN16 package. Both variants share identical electrical characteristics and functionality but differ in physical package dimensions and pinout mapping. The UP package utilizes a 16-bump wafer-level chip-scale format with a 0.35 mm pitch, designed for space-constrained mobile applications.

Translators, Level Shifters Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.

Translators, Level Shifters FAQ

Can the DAT and CMD channels be swapped?

Yes, the internal design of channels DAT0, DAT1, DAT2, DAT3, and CMD is identical. They can be exchanged to ease PCB layout issues without impacting functionality.

How is the device enabled and disabled?

The device has an auto-enable feature; it enables when VCCB rises above 1.5 V and disables when VCCB drops below 0.65 V.

What is the purpose of the CLKFB pin?

The CLKFB pin provides a feedback clock path from the host to compensate for delay introduced by the translator and PCB tracks, improving timing margin for data read-back from the memory card.