Industrial gigabit ethernet transceivers offer precision timing protocol

To deliver critical process synchronisation, Microchip announces the LAN8840 and LAN8841 Gigabit Ethernet transceiver devices that meet IEEE 1588v2 standards for Precision Timing Protocol. The LAN8840/41 Ethernet devices are enabled with Linux drivers and deliver flexible Ethernet speed options including 10BASE-T, 10BASE-Te, 100BASE-TX and 1000BASE-T.

The LAN8840/41 devices can facilitate critical packet prioritisation by providing high-speed time stamping that is then relayed between the various components to determine network latencies, accommodate for those latencies, and synchronise time amongst all connected devices. This functionality is key for process automation applications that require precise control production systems such as robotics, distributed sensors and cooling and mixing systems. Designed with robust applications in mind, the LAN8840/41 devices can withstand extended industrial temperatures ranging from -40°C to +105°C.

“The new LAN8840/41 single-port transceivers round out our Time Sensitive Networking offering by providing the connectivity for end nodes in process automation applications,” said Charles Forni, Vice President of the USB and Networking Business Unit at Microchip. “These devices complement our existing Ethernet portfolio, providing our customers with an end-to-end network solution of components, development tools and support from Microchip.”

To help companies achieve sustainability goals by reducing a network’s power consumption, the LAN8840/41 offers features like Wake-on-LAN (WoL) and energy-detect power-down mode.

Additionally, Energy-Efficient Ethernet (EEE) delivers low-power idle and clock stoppage modes for optimal power performance.

Microchip is an established supplier of industrial-grade networking solutions, offering a broad portfolio of robust and highly integrated products.

The LAN8840/41 devices are well suited for markets with applications requiring accurate and precise time stamping, such as gas and chemical processing, electrical distribution, and currency trade systems which must be proven to be in sync with the National Institute of Standards and Technology (NIST) for Universal Coordinated Time (UTC) within one millisecond or finer increments.

Development Tools

The LAN8841 Ethernet Development System (EDS) Daughter Card is designed to provide a modular addition to compatible Microchip host boards. This EDS Daughter Card, when paired with the PCIe Networking Adapter, enables evaluation of the LAN8841 through any host supporting the PCIe interface. Linux drivers supporting Precision Timing Protocol (PTP4L) are available for the LAN8841 on Microchip’s GitHub repository.

Pricing and Availability

The LAN8840 (48 QFN) and LAN8841 (64 WQFN) are available in high-volume production. Pricing starts at $2.78 in 10,000-piece quantities.