OVERVIEW
16
TD+/-{1:4}
TXD[3:0] {1:4}
TXEN {1:4}
TXER{1:4}
TXC
8
Multimode
TX DAC
Baseline
Wander
Correction
10BASE-T
PCS
4
4
4
COL/RXEN {1:4}
RXC {1:4}
CRS {1:4}
RXDV {1:4}
RXER {1:4}
RXD[3:0] {1:4}
100BASE-T
PCS
Digital
Adaptive
Equalizer
4
4
4
4
4
4
16
RD+/-{1:4}
8
S/H
ADC
CRS/Link
Detection
Auto-
Negotiation/
Link Integrity
LNKLED {1:4}
COLLED {1:4}
100LED {1:4}
FDXLED {1:4}
XMTLED {1:4}
RCVLED {1:4}
LED
Drivers
4
4
4
4
CK25
Clock
Generator
Bias
Generator
JTAG
TAP+BS
Clock
Recovery
BIAS
3
5
20
MODES
MDC
MDIO
JTAG
MII
Registers
MII
Mgmt
Control
The BCM5208R is a monolithic CMOS integrated circuit containing 4
transceivers that each perform all of the physical layer interface
functions for 10BASE-T Ethernet on Category 3, 4, 5 unshielded
twisted-pair (UTP) cable and 100BASE-TX Ethernet on Category 5 UTP
cable.
The BCM5208R employs the use of digital signal processing and full
custom circuit design techniques to create a highly integrated and robust
physical layer solution for Fast Ethernet switches. It complies fully with
the IEEE 802.3u physical layer Media Independent Interface (MII) and
auto-negotiation subsections, providing compatibility with all industry-
standard Fast Ethernet MAC chips.
The BCM5208R chip performs all the 4B5B, MLT3, NRZI, and
Manchester encoding and decoding; clock and data recovery; stream
cipher scrambling/descrambling; digital adaptive equalization; line
transmission; carrier sense; and link management functions. The
BCM5208R can be connected to a MAC through the MII on one side,
and directly to the network media on the other side (through isolation
transformers for UTP mode).
The BCM5208R is an easy cost-reduction path for 10/100 systems
originally designed with the BCM5208. The BCM5208R is a lower
power, lower cost alternative that can drop into most BCM5208 designs
without any hardware change.
Broadcom
®
, the pulse logo, and
Connecting everything
®
are trademarks of Broadcom Corporation and/
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5208R-PB03-R
04/01/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
BOARDCOM [ Broadcom Corporation. ]
