NXP Semiconductors has released the TJA1410 and TJF1410 Physical Medium Dependent (PMD) transceivers, bringing a new approach to 10BASE-T1S Single Pair Ethernet connectivity. Unlike traditional integrated MAC-PHY chips from Microchip and Analog Devices, these transceivers separate the analog physical layer from the digital Ethernet logic, allowing the host microcontroller or switch to handle the digital PHY portion while the transceiver manages only the analog signal transmission and reception over a single twisted-pair cable.
Both chips support 10 Mbps Ethernet over cables up to 100 meters (328 feet) in length and communicate with the host via a 3-pin OPEN Alliance interface. The industrial TJF1410 variant supports multi-drop topologies with up to 32 nodes on a single bus, enabling daisy-chained sensors, actuators, or zone controllers without costly point-to-point switched connections. The automotive TJA1410 is ISO 26262 ASIL B compliant and AEC-Q100 Grade 1 qualified, while both versions support OPEN Alliance TC10 and TC14 wake-up signaling, Power over Data Line (PoDL) implementations, and come in compact 3 x 3 mm (0.12 x 0.12 inch) HVSON8 packages.
NXP provides Linux drivers and real-time software support for both transceivers, including AUTOSAR and non-AUTOSAR platforms. The chips work with host controllers that integrate the 10BASE-T1S digital PHY, such as NXP's S32K5, S32N7, and S32J100 families for automotive applications, and upcoming MCX A microcontroller series members with 10BASE-T1S interfaces for industrial use.
The TJF1410 industrial variant is priced at $0.89 (€0.82) per unit for 1,000-unit orders, while the automotive-grade TJA1410 costs $0.44 (€0.40) per unit at the same order volume. Both transceivers are available now through NXP's store.