SJA1105RELY

Controllers Overview

The SJA1105RELY is a five-port automotive Ethernet switch from the NXP SJA1105P/Q/R/S series, designed for control applications. It supports IEEE 802.3 standards with individually configurable ports operating at 10/100 Mbit/s via MII/RMII or 10/100/1000 Mbit/s via RGMII/SGMII. The device features independent I/O voltage domains selectable at 1.8 V, 2.5 V, or 3.3 V, alongside a 1.2 V core voltage. It provides hardware support for IEEE 802.1AS timestamping and IEEE 1588v2 synchronization. Packaged in an LFBGA159 (12 mm × 12 mm) format, it operates within an ambient temperature range of -40 °C to +105 °C and meets AEC-Q100 Rev-H qualification.

Controllers Feature Summary

• Supports deterministic network delays and jitter through strict bandwidth allocation between critical and non-critical traffic using credit-based shapers.
• Enables fully synchronized networks via hardware support for IEEE 802.1AS timestamping and IEEE 1588v2 one-step sync forwarding.
• Provides flexible ECU design by supporting any 10/100/1000 BASE-TX PHYs and offering multiple interface options including MII, RMII, RGMII, and SGMII.

Controllers Applications

• Modular Electronic Control Units (ECUs) requiring Ethernet as a backbone for control applications
• Integration of modular Advanced Driving Assistance Systems (ADAS)
• Surround view camera systems scaling up from single rear-view cameras

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure compatibility with the target system's voltage requirements and interface standards before procurement. Confirm that the component meets the necessary automotive qualification standards for the intended application environment.

Controllers Selection Notes

Select this model when a five-port automotive Ethernet switch with TSN capabilities is required. Consider the SJA1105REL variant if SGMII interfaces are needed for EMC-friendly gigabit connections. Verify that the LFBGA159 package fits the PCB layout constraints and that the host processor supports the SPI interface for configuration.

Controllers Part Context

The SJA1105RELY belongs to the SJA1105P/Q/R/S family, which extends the functionality of the original SJA1105EL/TEL series. This family improves security features, expands interface options, and adds support for Time-Sensitive Networking (TSN). The 'R' designation specifically indicates the inclusion of SGMII interfaces compared to the P and Q variants.

Controllers Replacement Considerations

SJA1105PELY, SJA1105QELY, SJA1105SELY