O V E R V I E W
TXD [3:0]
4
TXEN
TXER
TXD [1:0]
TXEN
Multimode
Xmt DAC
12
TD+/-
TXC
MII to
RMII
10BASE-T
PCS
Baseline
Wander
Correction
REF_CLK
Auto
MDIX
COL
RXC
or
100BASE-X
PCS
CRS
SMII
CRS_DV
RX_ER
RXDV
Digital
Adaptive
Equalizer
RD+/-
SD+/-
ADC
RXER
RXD[1:0]
2
RXD[3:0]
4
Auto-
Negotiation/
Link Integrity
CRS/Link
Detection
2
Clock
Generator
Clock
Recovery
RFF_CLK
BIAS
Bias
Generator
MDC
MII
Registrers
MII
Mgmt
Control
JTAG
TAP+BS
JTAG
5
MDIO
The Broadcom® BCM5226 is a single-chip device containing six
independent Fast Ethernet transceivers. Each performs all the physical
layer interface functions for 100BASE-TX full-duplex or half-duplex
Ethernet on Category 5 twisted-pair cable and 10BASE-T full or half-
duplex Ethernet on Category 3, 4 or 5 cable. Each port may also be
configured for 100BASE-FX full or half-duplex transmission over fiber-
optic cabling when paired with an external fiber-optic line transceiver.
The BCM5226 operates from a 2.5V power supply, which dramatically
lowers total power consumption compared to 3.3V and 5V designs. The
BCM5226 I/O operates at either 2.5V or 3.3V, for compatibility with
3.3V designs.
The BCM5226 is the first 10/100 Ethernet transceiver to incorporate the
Hewlett-Packard auto-Media Dependent Interface Crossover (Auto-
MDIX) feature. Originally specified in the IEEE 802.3ab Gigabit
Ethernet standard for Category 5 cable, the Auto-MDIX feature enables
the transceiver to automatically detect and correct a crossed cable. This
allows system installation and maintenance personnel to use crossover or
straight-through cables interchangeably, regardless of whether the cable
is attached to another switch, network interface card or repeater. This
capability eliminates incorrect connections due to cable mismatch,
making it easier and less expensive to install and operate 10/100 Ethernet
switches.
The BCM5226 chip performs 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 integrity monitoring, auto-
negotiation and RMII management functions.
The BCM5226 can be connected to a switch controller through the RMII
on one side and connects directly to the network media on the other side
through isolation transformers for UTP modes or fiber-optic transceiver
components for FX mode. The BCM5226 is compliant with the IEEE
802.3 standard.
The BCM5226R supports RMII, and is available in a 160-pin plastic
quad flatpack package (PQFP); the BCM5226R supports SMII, and is
available in a 128-pin PQFP.
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
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
© 2004 by BROADCOM CORPORATION. All rights reserved.
5226-PB06-R
04/07/04