ON5204,127

Overview

The ON5204,127 is a dual-channel I3C or I²C multiplexer featuring hardware select and enable capabilities. It supports bidirectional signal switching with a wide supply voltage range from 2.3 V to 3.6 V, while switch voltages accept signals up to 5.5 V. The device operates with 1.8 V control logic at VCC = 3.6 V and includes a low-power mode when OE is HIGH, drawing a maximum of 2 μA. Key electrical parameters include a maximum ON resistance of 6Ω with a typical value of 0.1 Ω, an ON-state capacitance of 6 pF (typical), and a high bandwidth of 52 MHz (typical).

Feature Summary

• Hardware-selectable I3C or I²C 2:1 or 1:2 mux functionality allowing bus voltage up to 5.5 V.
• Low-power operation with minimal current draw in the enabled-off state.
• High bandwidth performance suitable for fast data transmission requirements.
• Robust ESD protection exceeding industry standards for HBM and CDM.

Applications

• Server DDR5 RDIMM applications.
• I3C-bus multiplexing systems.
• Consumer laptops.
• Communications systems.
• Data center infrastructure.

Procurement Notes

Verify the specific ordering code against official NXP documentation to ensure correct package configuration and tape-and-reel specifications. Confirm that the selected variant matches the required operating temperature range and pinout compatibility for your PCB layout. Cross-reference the datasheet revision history to validate any recent updates to electrical characteristics or mechanical dimensions before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring isolation between I3C or I²C buses with distinct voltage domains. The device is appropriate for applications needing low ON resistance and high bandwidth to maintain signal integrity. Consider the 5.5 V signal tolerance if interfacing with higher voltage peripherals. Ensure the control logic voltage aligns with the system's available power rails for proper enable and select pin operation.

Part Context

This multiplexer belongs to NXP's portfolio of system management interfaces, specifically designed for I²C and I3C protocols. It complements other components like digital temperature sensors and real-time clocks in server and consumer electronics. The device addresses the need for flexible bus topology management in dense electronic environments, supporting modern memory and peripheral integration standards.

Replacement Considerations

Consult the official NXP selector guide for direct functional equivalents within the same family. Verify pin-to-pin compatibility and electrical parameter alignment before substituting. Generic I²C switches may not support the specific I3C features or voltage tolerances required by this application.

FAQ

What is the maximum voltage allowed on the switch signals?

The switch voltage accepts signals up to 5.5 V, independent of the supply voltage range.

How does the device achieve low-power consumption?

It enters a low-power mode when the Output Enable (OE) pin is set to HIGH, limiting current draw to a maximum of 2 μA.

Is the device compatible with both I²C and I3C protocols?

Yes, it functions as a 2:1 or 1:2 mux for both I³C and I²C buses with hardware select capability.