BCM5208 ETC, BCM5208 Datasheet - Page 2

• Manufacturer Part Number: BCM5208
• Description: 10/100 BASE-TX QUAD TRANSCEIVER
• Manufacturer: ETC

The BCM5208 is a monolithic CMOS integrated circuit
containing four transceivers that each perform all the physical
layer interface functions for 10BASE-T Ethernet on CAT 3, 4, 5
unshielded twisted pair (UTP) cable, 100BASE-TX Ethernet on
CAT5 UTP cable, and 100BASE-FX Ethernet on 62.5/125-µm
multimode fiber optic cable.
The BCM5208 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 and
multisegment repeaters. 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 and repeater chips.
Broadcom and the Broadcom Logo are registered trademarks of Broadcom Corporation.
Quad- is a trademark of the Broadcom Corporation.
For more information please contact us at:
Phone: [phone], FAX: [phone]
Email: [e-mail]
Visit our web site at: www.broadcom.com
© 1999 BROADCOM CORPORATION
BCM5208.1PB3.15.99
RD+/-{1:4}
TD+/-{1:4}
SD+/-{1:4}
JTAG
CK25
BIAS
8
3
8
5
8
S/H
Generator
Generator
Detection
CRS/Link
TAP+BS
Clock
JTAG
Bias
Multimode
TX DAC
Correction
Baseline
Wander
B C M 5 2 0 8
ADC
Recovery
Clock
Equalizer
Adaptive
Digital
O V E R V I E W
Link Integrity
The BCM5208 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 BCM5208 may be connected to a
MAC or repeater controller through the MII on one side, and
connects directly to the network media on the other side (through
isolation transformers for UTP mode or fiber optic
transmitter/receiver components for FX modes).
In repeater mode, the MII ports may be bussed with other BCM5208
devices. Port multiplexing logic also allows the BCM5208 to be
optimized for multisegment repeater configurations.
Negotiation/
Registers
Auto-
MII
100BASE-T
10BASE-T
PCS
PCS
16215 Alton Parkway, P.O. Box 57013
Drivers
Control
LED
Mgmt
BROADCOM CORPORATION
MII
Irvine, California 92619-7013
4
4
4
4
4
4
20
16
4
4
4
4
4
4
16
4
TXD[3:0] {1:4}
TXEN {1:4}
TXER{1:4}
TXC
COL/RXEN {1:4}
RXC {1:4}
CRS {1:4}
RXDV {1:4}
RXER {1:4}
RXD[3:0] {1:4}
LNKLED {1:4}
COLLED {1:4}
100LED {1:4}
FDXLED {1:4}
XMTLED {1:4}
RCVLED {1:4}
MODES
MDC
MDIO