The RTL8201BL is a single-port PHYceiver with an MII (Media Independent Interface). It implements all 10/100M Ethernet Physical-layer functions including the Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA), Twisted Pair Physical Medium Dependent Sublayer (TP-PMD), 10Base-Tx Encoder/Decoder and Twisted Pair Media Access Unit (TPMAU). A PECL interface is supported to connect with an external 100Base-FX fiber optical transceiver. The chip is fabricated with an advanced CMOS process to meet low voltage and low power requirements.

The RTL8201BL can be used as a Network Interface Adapter, MAU, CNR, ACR, Ethernet Hub and Ethernet Switch. Additionally, it can be used in any embedded system with an Ethernet MAC that needs a twisted pair physical connection or fiber PECL interface to external 100Base-FX optical transceiver module.

• Supports MII interface
• Supports 7-wire SNI (Serial Network Interface)
• Supports 10/100Mbps operation
• Supports half/full duplex operation
• Support of twisted pair or Fiber mode output
• IEEE 802.3/802.3u compliant
• Supports IEEE 802.3u clause 28 auto negotiation
• Supports power down mode
• Supports operation under Link Down Power Saving mode
• Supports Base Line Winder (BLW) compensation
• Supports repeater mode
• Speed/duplex/auto negotiation adjustable
• Utilizes DSP technology
• 3.3V operation with 5V IO signal tolerance
• Low operation power consumption
• Low power and dual supply 3.3V and 2.5V can be supported by the internal regulator function in conjunction with external power PNP transistor
• Adaptive Equalization
• 25MHz crystal/oscillator as clock source
• Fiber PECL interface support
• Multiple network status LED support
• Flow control ability support to co-work with MAC (by MDC/MDIO)
• 0.25µ CMOS process
• 48-pin LQFP package

• Network interface adapters and Ethernet hubs/switches
• Ethernet MAC-embedded systems that need twisted-pair physical connection, such as those for ADSL/cable modem routers and IA gateways