Spesifikasi
RTL8365MB‑VC‑CG is a Layer 2 manageable 4+1 port Gigabit Ethernet switch controller produced by Realtek, integrating four built-in 10/100/1000M PHY transceivers, non-blocking switching fabric and on-chip packet buffer SRAM within a single chip, optimized for cost-effective compact network equipment design.
Definisi Nomor Bagian
RTL8365MB represents the core 4 copper PHY ports plus one expandable uplink GMAC port switch model. VC stands for the hardware version with complete RGMII/MII interface configuration and full register management functions. CG refers to 128-pin LQFP surface mount package with exposed thermal pad, factory default tape-and-reel packaging for automated SMT assembly.
Core Port and Protocol Specifications
This chip integrates four independent RJ45 network ports with native Gigabit PHY circuits, fully compliant with IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3ab 1000BASE-TX and IEEE 802.3az Energy Efficient Ethernet standards. All ports support auto-negotiation of transmission speed and duplex mode. Full duplex mode is available at 10M, 100M and 1000M rates, while half duplex only works under 10M and 100M operating conditions. Each port embeds Auto-MDI/MDIX automatic cable pin sequence correction function, eliminating the need to distinguish straight-through and crossover network cables. One reserved extended GMAC uplink interface supports flexible switching between RGMII and MII modes, which can connect main control processors, wireless router SoC or external fiber optical transceivers to realize optical fiber network uplink expansion. It adopts wire-speed non-blocking store-and-forward forwarding architecture and supports jumbo frame transmission up to 9216 bytes. The on-chip MAC address lookup table can store up to 8K address entries, supporting automatic address learning, aging and static binding, with 128KB built-in packet buffer memory to guarantee stable data forwarding under burst traffic scenarios.
Management and QoS Functional Features
It supports port-based VLAN, 802.1Q tagged VLAN, port isolation as well as broadcast and multicast storm suppression. The built-in 8-level hardware QoS priority queuing mechanism sorts data forwarding priority based on port number, 802.1p VLAN tag and DSCP field, ensuring low-latency preferential transmission for voice, video and critical service data. Other configurable functions include port mirroring, bidirectional ingress and egress bandwidth rate limiting, spanning tree protocol to prevent Layer 2 network loops, and cable diagnostic function for detecting cable open circuit, short circuit and cable length faults. System configuration parameters can be automatically loaded from external EEPROM upon power-on initialization. Upper-level MCU can implement register reading, writing and function configuration via the SMI serial management bus.
Desain Catu Daya dan Jam
The chip applies multi-group power supply framework. 3.3V supplies power to I/O peripheral circuits, internal integrated LDO generates dedicated 1.0V core voltage and PHY working voltage, greatly simplifying peripheral power circuit layout. Only one external 25MHz passive crystal oscillator is required to provide the system reference clock source. Multiple low-power sleep modes and link idle power saving mechanisms are embedded to reduce overall power consumption when ports are disconnected or in idle status. Each network port corresponds to independent LED indicator pins to display link connection status, transmission rate and data activity.
Informasi Kemasan dan Mekanis
Package form is 128-pin LQFP quad flat leaded package with exposed thermal pad. Moisture Sensitivity Level is MSL 3, and reflow soldering must be finished within 168 hours after opening the vacuum moisture-proof packaging bag. The bottom exposed thermal pad effectively reduces thermal resistance and improves heat dissipation efficiency during long-term high-load continuous data forwarding, promoting long-term stable operation of the chip.
Standar Lingkungan dan Kepatuhan
Operating ambient temperature ranges from 0 ℃ to +70 ℃. The product is fully lead-free and complies with RoHS and REACH environmental protection standards without containing restricted hazardous substances. Optimized EMC electromagnetic interference suppression design enhances anti-interference performance, adapting to consumer network terminals and light industrial control network working environments.
Skenario Aplikasi Umum
5-port desktop managed and unmanaged Gigabit switches and mini industrial Ethernet switches Home broadband wireless routers, gateway devices and IPTV set-top box internal switching core NVR video recording hosts and multi-channel IP camera monitoring system wired network processing unit Intelligent building wiring equipment, protocol conversion gateways and embedded multi-port network expansion boards Small office network distribution terminals, PoE switch main control switching chips and low-cost wired access modules
LXB Semicon supplies original Realtek RTL8365MB‑VC‑CG 4+1 port Layer 2 managed Gigabit Ethernet switch IC
