RTL8201CL
Datasheet
1. General Description
The RTL8201CL 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), 10Base-Tx Encoder/Decoder, and Twisted-Pair Media Access Unit
(TPMAU).
A PECL (Pseudo Emitter Coupled Logic) interface is supported to connect with an external 100Base-FX
fiber optical transceiver. The chip utilizes an advanced CMOS process to meet low voltage and low
power requirements. With on-chip DSP (Digital Signal Processing) technology, the chip provides
excellent performance under all operating conditions.
The RTL8201CL 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, it 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.
2. Features
The Realtek RTL8201CL is a Fast Ethernet PHYceiver with selectable MII or SNI interface to the MAC
chip. It provides the following features:
Supports repeater mode
Pin-to-pin compatible with the RTL8201BL
Adaptive Equalization
Supports MII and 7-wire SNI (Serial Network
Interface)
Network status LEDs
10/100Mbps operation
Full/half duplex operation
Twisted pair or fiber mode output
Auto-Negotiation
Flow control support
25MHz crystal/oscillator as clock source
IEEE 802.3/802.3u compliant
Supports IEEE 802.3u clause 28; 1.8V
operation with 3.3V IO signal tolerance
Supports power down mode
Low dual power supply, 1.8V and 3.3V; 1.8V
Supports operation under Link Down Power
is generated by an internal regulator
Saving mode
0.18µm CMOS process
48-pin LQFP package
Supports Base Line Wander (BLW)
compensation
Single-Chip/Port 10/100 Fast Ethernet PHYceiver
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Track ID: JATR-1076-21 Rev. 1.24
REALTEK [ Realtek Semiconductor Corp. ]
