AR8031-AL1B

Series:	--
Part Status:	Active
Type:	Transceiver
Protocol:	Ethernet
Number of Drivers/Receivers:	1/1
Duplex:	Full
Receiver Hysteresis:	25mV
Data Rate:	--
Voltage - Supply:	3.3V
Operating Temperature:	-40°C ~ 85°C

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AR8031-AL1B Application Field and Working PrincipleAR8031-AL1B is a high performance 8-port size Gigabit Ethernet transceiver, a physical layer (PHY) device for data communication applications over media such as copper cable, fiber and backplanes. It complies with IEEE 802.3u 100BASE-TX and 802.3ab 1000BASE-T standards and provides full-duplex operation in both operating modes.The AR8031-AL1B has a register-based architecture, supports auto-negotiation and loopback modes, and is compatible to multiple host interface types such as External MII/RMII/TSEC MII/GMII/RGMII. The device is designed to interface with a host microcontroller with a host interface and Ethernet MACs, providing an optimal physical layer solution with robust performance and superior scalability at minimized system cost.In addition, the AR8031-AL1B features advanced cable diagnostics and troubleshooting capabilities, including Cable Length Compensation and Cable Fault Location services. The cable length compensation algorithm accurately compensates for length differences between multiple cable segments, supporting up to 5 cable links that are bridged in a series. Similarly, the cable fault location feature automatically identifies and reports broken cables or segments.The AR8031-AL1B device consists of a medium independent interface (MII) or Reduced MII (RMII) or Triple speed MII (TSEC MII) or Gigabit Media Independent Interface (GMII) or Reduced GMII for gigabit application (RGMII), a management data input/output (MDIO) interface, a hybrid transceiver and integrated 10-bit A/D converter, control logic, and a standard Ethernet transceiver.In terms of system configuration, the AR8031-AL1B offers several test modes, including the standard auto-negotiation, force mode, loopback, and fast link. The auto-negotiation mode can automatically select the best connection speed for both client and server endpoints, operating at 10, 100 or 1000 Mbps speeds. The force mode allows users to manually select connection speed settings, while the loopback mode facilitates system debugging and troubleshooting by enabling a loopback configuration between two connecting devices. The fast link mode allows users to skip auto-negotiation and directly activate link setup, providing faster link activation without having to wait for the auto-negotiation process.To enable link establishment, the AR8031-AL1B device performs a two-stage parallel detection process that involves low-to-high voltage transition detection (LTV) and link integrity check (LC) functions. The LTV detection is performed first, by comparing a preset minimum and maximum transition voltage levels of the incoming signal. Through the LC check, the transceiver can detect if the device is connected to a valid transceiver on the other side of a link. Upon detecting a valid link, the device then executes a series of checks, including length, speed and jitter checks to ensure that the received signal is within specifications.In terms of cable diagnostics, the AR8031-AL1B device supports the Cable Length Compensation (CLC) and Cable Fault Location (CFL) features, with data rate and cable length up to 100m and 1km respectively. The CLC feature enables the system to compensate for the loss of signal strength at longer cable distances, while the CFL feature detects and reports broken cable links or faulty segments in order to help with system troubleshooting.In conclusion, the AR8031-AL1B is an ideal transceiver for a variety of applications, such as access control, security, industrial automation, automotive, sensing and monitoring applications. The device combines the benefits of low power, wide range of operating temperatures, low cost and interface flexibility, allowing users to conveniently deploy it in various environments and applications. The device’s integrated cable diagnostics and troubleshooting capabilities offer users further convenience and accurate performance assessment, furthering its performance as an enterprise-grade physical layer device.

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