SJA1105PQRS

The SJA1105PQRS is a high-performance Ethernet switch IC manufactured by NXP Semiconductors, designed for use in automotive and industrial applications requiring deterministic communication and robust network management. It supports up to 8 independent Ethernet ports, each capable of operating at 10/100/1000 Mbps, enabling flexible and scalable network topologies. The device features advanced traffic prioritization through IEEE 802.1Qbv Time-Aware Shaper (TAS) and IEEE 802.1Qci per-stream filtering and shaping, ensuring low-latency, time-sensitive data transmission critical for real-time control systems. This switch integrates hardware-based VLAN support, MAC address learning, and loop prevention via the Spanning Tree Protocol (STP), enhancing network reliability and segmentation. It also includes comprehensive Quality of Service (QoS) mechanisms such as priority queues and rate limiting, allowing efficient handling of mixed traffic types—including audio/video, control signals, and diagnostics—within a single network infrastructure. The SJA1105PQRS supports IEEE 802.1AS for precise time synchronization across the network, which is essential for applications like autonomous driving and industrial automation where synchronized operations are required. Designed for harsh environments, the chip operates over an extended temperature range from -40°C to +125°C, making it suitable for automotive-grade deployments. Its integrated power management reduces system-level power consumption, while its robust EMI performance ensures reliable operation in electrically noisy conditions. The device includes a secure boot feature and tamper detection capabilities, aligning with functional safety standards such as ISO 26262 and IEC 61508 for safety-critical systems. The SJA1105PQRS is commonly used in automotive domain networks (e.g., infotainment, ADAS, and gateway modules), industrial control systems, and embedded networking solutions where deterministic behavior, high bandwidth, and fault tolerance are paramount. It supports various interface options including RMII, RGMII, and SGMII, enabling seamless integration with microcontrollers, processors, and other network components. With built-in diagnostics and configuration via a serial management interface (SPI or MDIO), the switch simplifies system setup, monitoring, and maintenance in complex embedded environments.