المواصفات
RTL8367N‑VB‑CG is a single-chip 5-port Gigabit Ethernet switch controller launched by Realtek. It integrates five channels of 10/100/1000M PHY transceivers, a non-blocking switching structure and packet buffer memory, serving as a cost-effective solution for compact Gigabit switching devices.
Part Number Definition
RTL8367N refers to the core model of a 5-port Gigabit switch chip with integrated PHY and no additional extended GMAC ports. VB stands for the standard hardware configuration version that supports automatic configuration loading from external EEPROM and management via the SMI interface. CG denotes the MQFN-88 surface mount package with exposed thermal pad. The original factory adopts tape-and-reel packaging by default to match automated SMT assembly.
Basic Port and Protocol Specifications
The chip features 5 independent Ethernet ports with native integrated Gigabit PHY circuits. 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. All ports auto-negotiate transmission speed and duplex mode. Full duplex is available at all rates, while half duplex only works under 10M and 100M modes. Every port is equipped with Auto-MDI/MDIX function to automatically identify and reverse cable pin assignment, eliminating the need to distinguish straight-through and crossover cables. Built with a wire-speed non-blocking forwarding architecture and store-and-forward packet processing mechanism, it supports jumbo frames up to 9216 bytes. An on-chip 2K MAC address table supports automatic address learning, aging and static binding, alongside integrated 128KB packet buffer SRAM.
Management and QoS Functions
It supports port-based VLAN, 802.1Q tagged VLAN, port isolation and broadcast storm suppression. An 8-level QoS priority scheduling system classifies data streams based on port number, 802.1p tags and DSCP values to ensure priority transmission of voice and video data. Other configurable features include port mirroring, ingress and egress bandwidth rate limiting, IEEE 802.3x full-duplex flow control and half-duplex backpressure congestion control. Basic spanning tree protocol is available to prevent network loops. Configuration parameters can be automatically loaded from external EEPROM upon power-up, and the upper-level MCU can read and write registers through the SMI serial management interface for parameter configuration and status inquiry.
Power Supply and Clock Requirements
It adopts a dual power supply design. 3.3V powers the I/O peripheral circuits, and an internal LDO generates 1.0V core operating voltage to simplify peripheral power circuit design. Only one external 25MHz passive crystal oscillator is required as the system reference clock. Multiple low-power sleep modes and link power saving mechanisms reduce power consumption when ports are disconnected or idle. Dedicated LED pins are reserved for each port to indicate link status, connection speed and data activity.
Package and Mechanical Details
The package type is 88-pin MQFN with exposed thermal pad, with an overall dimension of 10mm × 10mm. Compared with the LQFP128 version of the same product line, its ultra-small form factor greatly saves PCB layout space. The Moisture Sensitivity Level is MSL 3, and reflow soldering must be finished within 168 hours after opening the vacuum moisture-proof package. The exposed pad on the bottom effectively lowers thermal resistance and improves heat dissipation during long-term continuous data forwarding.
Environmental and Compliance Standards
The operating ambient temperature ranges from 0 ℃ to +70 ℃. The product is lead-free and fully compliant with RoHS and REACH regulations without restricted hazardous substances. Optimized EMC design restrains electromagnetic interference, making it suitable for consumer electronics and light industrial network terminal equipment.
مجالات التطبيق النموذجية
5-port desktop mini unmanaged Gigabit switches and compact industrial switches with metal casing Internal switching core of home wireless routers, broadband gateways and IPTV set-top boxes Wired network switching unit for NVR video recorders and multi-channel IP camera monitoring hosts Smart home gateways, embedded data acquisition terminals and multi-port network expansion boards POS payment terminals, small office network distribution equipment and low-cost wired access modules
LXB Semicon supplies original Realtek RTL8367N‑VB‑CG 5-port Gigabit Ethernet switch IC with integrated PHY
