NXB0102UNZ

Translators, Level Shifters Overview

The NXB0102UNZ is a dual supply translating transceiver with auto direction sensing and 3-state output, manufactured by Nexperia USA Inc. It features two bidirectional data ports (An, Bn) and an active HIGH output enable input (OE). The device supports voltage translation between VCC(A) ranging from 1.2 V to 3.6 V and VCC(B) ranging from 1.65 V to 5.5 V. It includes IOFF circuitry for partial power-down applications to prevent backflow current. The component is specified for ambient temperatures from -40 °C to +125 °C and utilizes a WLCSP8 package.

Translators, Level Shifters Feature Summary

• Auto direction sensing enables bidirectional voltage level translation without requiring explicit direction control signals.
• IOFF circuitry provides partial power-down mode operation, disabling outputs to prevent damaging backflow currents when powered down.
• High ESD protection capabilities exceeding 2500 V for the A port and 15000 V for the B port under HBM standards.
• Supports 3-state functionality via an active HIGH OE pin, allowing high-impedance OFF-state isolation.

Translators, Level Shifters Applications

• Voltage level-translation applications interfacing devices operating at different supply voltages
• Partial power-down applications utilizing IOFF circuitry
• Systems requiring bidirectional data transfer between low voltage nodes

Translators, Level Shifters Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type, as the base part number covers multiple variants including VSSOP8, XSON8, and WLCSP8. Confirm the temperature range specification matches the application requirements, noting that this variant is rated for -40 °C to +125 °C. Ensure compatibility with the intended supply voltage ranges on both VCC(A) and VCC(B) rails before integration.

Translators, Level Shifters Selection Notes

Select this component when designing circuits that require automatic direction sensing for bidirectional data lines between disparate voltage domains. It is suitable for interfaces where VCC(A) must not exceed VCC(B) during normal operation. Consider the WLCSP8 package constraints if space is limited. Note that it is not recommended for open-drain applications like I2C due to its push-pull architecture; use NXS0102 for such cases instead.

Translators, Level Shifters Part Context

The NXB0102 belongs to Nexperia's family of dual supply translating transceivers designed for robust voltage level shifting. Unlike simpler translators, this device incorporates auto direction sensing logic, eliminating the need for separate direction control pins. The inclusion of IOFF support distinguishes it in systems requiring safe power sequencing or partial shutdown states without risking reverse current flow through the I/O lines.

Translators, Level Shifters Replacement Considerations

NXS0102 is specified for open-drain applications such as I2C, whereas the NXB0102 is designed for push-pull interfaces. Direct substitution requires verifying that the target application does not rely on open-drain bus characteristics. Other Nexperia level shifters may lack the auto-direction sensing feature present in the NXB0102.

Translators, Level Shifters FAQ

Can VCC(A) be higher than VCC(B) during power-up?

Yes, while VCC(A) must not exceed VCC(B) during normal operation, the device is not damaged if VCC(A) is greater than or equal to VCC(B) during the power-up phase.

Is the NXB0102 suitable for I2C bus applications?

No, the NXB0102 is not recommended for open-drain driver applications such as I2C. The datasheet recommends using the NXS0102 level translator for these specific interfaces.

How does the device handle direction control?

The NXB0102 features auto direction sensing, meaning it automatically detects the direction of data flow between port A and port B without requiring an external direction control signal.