Product Summary

The RTL8225 is a single-chip/single-port PHYceiver with an MII (Media Independent Interface)/SNI (Serial Network 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), with an auto crossover detection function, 10Base-Tx Encoder/Decoder, and Twisted-Pair Media Access Unit (TPMAU). The RTL8225 can be used for applications such as those for a Network Interface Adapter, MAU (Media Access Unit), CNR (Communication and Network Riser), ACR (Advanced Communication Riser), an Ethernet hub, and an Ethernet switch. In addition, the RTL8225 can be used in any embedded system with an Ethernet MAC that needs a UTP physical connection or Fiber PECL interface to an external 100Base-FX optical transceiver module.

Parametrics

RTL8225 absolute maximum ratings: (1)Supply Voltage: 3.0V to 3.6V; (2)Storage Temperature: -55℃ to 125℃.

Features

RTL8225 features: (1)Pin-to-pin compatible with the RTL8201BL; (2)Supports MII and 7-wire SNI (Serial Network Interface); (3)10/100Mbps operation; (4)Full/half duplex operation; (5)Twisted pair or fiber mode output; (6)Auto-Negotiation; (7)Supports power down mode; (8)Supports operation under Link Down Power Saving mode; (9)Supports Base Line Wander (BLW) compensation; (10)Supports auto crossover detection (new RTL8201CP function); (11)Supports repeater mode; (12)Adaptive Equalization; (13)Network status LEDs; (14)Flow control support; (15)25MHz crystal/oscillator as clock source; (16)IEEE 802.3/802.3u compliant; (17)Supports IEEE 802.3u clause 28; 1.8V operation with 3.3V IO signal tolerance; (18)Low dual power supply, 1.8V and 3.3V; 1.8V is generated by an internal regulator; (19)0.18μm CMOS process; (20)48-pin LQFP package.

Diagrams

RTL8225 block diagram