Spezifikationen
RTL8211DN‑VB‑GR is an industrial-grade single-port 10/100/1000BASE-T Gigabit Ethernet PHY transceiver developed by Realtek, integrating complete analog front-end, signal equalization, clock recovery and MDIO management circuits to realize physical layer signal conversion between MAC controller and twisted-pair cable.
Part Number Definition
RTL8211DN represents the core industrial temperature version of RTL8211 series Gigabit PHY chip with enhanced anti-interference and ESD protection. VB stands for the configuration version supporting both GMII and RGMII MAC host interfaces. GR denotes QFN-88 exposed pad surface mount packaging, factory standard tray and tape-and-reel packaging for automated SMT assembly.
Core Protocol and Interface Specifications
It fully complies with IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3ab 1000BASE-T and IEEE 802.3az Energy Efficient Ethernet standards. The MAC side provides two configurable working modes: GMII and reduced pin count RGMII, which can be directly connected to main processor, switch chip or embedded CPU MAC port. All cable ports support auto-negotiation of transmission rate and duplex mode, and built-in Auto-MDI/MDIX automatic line sequence identification and flipping function without distinguishing straight-through or crossover network cables. The internal DSP adaptive equalization and crosstalk cancellation algorithm guarantees stable 100-meter long-distance transmission over Category 5e network cable, and supports jumbo frame forwarding to improve large data transmission efficiency. Standard MDC/MDIO management bus is reserved for upper-layer chip register configuration, status reading and parameter adjustment.
Built-in Functional Features
It supports IEEE 802.3x full-duplex flow control and half-duplex backpressure congestion control mechanism to avoid packet loss under network congestion. The chip integrates hardware remote wake-on-LAN function, which can respond to magic packet signals to realize network remote startup of terminal equipment. Multiple power management modes including link down power down, idle low power and EEE energy saving are embedded to greatly reduce power consumption when no data is transmitted. Enhanced ±4kV ESD protection is added on the cable signal pins to resist surge interference in industrial field environments. Independent LED indicator pins are configured to display link status, connection speed and data transmission activity of the network port.
Power Supply and Clock Design
The main I/O circuit adopts 3.3V single power supply input, and the internal integrated multi-channel LDO voltage regulators generate core working voltage and analog front-end voltage, simplifying external peripheral power circuit design. Only one external 25MHz passive crystal oscillator is required to provide the system reference clock signal, with minimal peripheral auxiliary components needed for normal chip operation.
Package and Mechanical Information
Package type is 88-pin QFN quad flat no-leads package with exposed thermal pad, with overall dimension of 10mm × 10mm. Moisture Sensitivity Level is MSL 3, and reflow soldering must be completed within 168 hours after opening the vacuum moisture-proof packaging bag. The bottom exposed thermal pad effectively reduces thermal resistance and improves heat dissipation during long-term continuous high-speed data transmission.
Environmental and Compliance Standards
Industrial wide temperature operating range covers -40 ℃ to +85 ℃, adapting to extreme temperature working conditions of outdoor and on-site industrial equipment. The product is fully lead-free and compliant with RoHS and REACH regulations without restricted hazardous substances. Optimized EMC electromagnetic compatibility design strengthens resistance to electromagnetic interference, suitable for complex industrial electromagnetic environments.
Typische Anwendungsszenarien
Industrial control mainboards, PLC modules and on-site data acquisition terminal wired Ethernet communication circuits IP surveillance cameras, NVR video recording equipment and monitoring front-end network access units Embedded single-board computers, protocol conversion gateways and intelligent gateway wired network interfaces POS payment terminals, access control hosts and smart meter remote data transmission equipment Mini Gigabit switches, router expansion network ports and household intelligent wired network terminal devices
LXB Semicon supplies original Realtek RTL8211DN‑VB‑GR industrial grade Gigabit Ethernet PHY transceiver IC
