BCM5226
®
10/100BASE-TX/FX HEX-Φ™ TRANSCEIVER
FEATURES
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Single-chip six-port Fast Ethernet transceiver
HP Auto-MDIX
Low-power 2.5V CMOS technology
Compatible with 2.5V I/O and 3.3V I/O
Reduced Media Independent Interface (RMII)
Serial Media Independent Interface (SMII)
Fully integrated digital adaptive equalization
On-chip multimode transmit waveshaping
Edge-rate control eliminates external filters
Integrated baseline wander correction
Full-duplex support
Twisted-pair or fiber support on any or all ports
Interrupt output capability
Loopback mode for diagnostics
160-pin PQFP (BCM5226R)
128-pin PQFP (BCM5226S)
Proven Broadcom proprietary DSP Digi-Φ™ architecture
SUMMARY OF BENEFITS
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Target usage: Fast Ethernet switches.
Low power < 300 milliwatts per port.
Auto-MDIX detects and corrects cabling errors.
Provides robust performance over a broad range of operating
conditions.
Single-chip device contains six independent Fast Ethernet
transceivers.
Performs all 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.
Permits transmission over fiber-optic cabling when paired
with an external fiber-optic transceiver.
Compliant with IEEE 802.3 standard.
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IEEE 1149.1 (JTAG) scan chain support.
Quad BCM5208 Versus HEX BCM5226 Comparison
6 Active PHY components
+ 6 MACs including switch fabric
4 Active SMII PHY components
+ SMII MACs embedded in switch chip
Switch Fabric and System Logic
QUAD MAC
QUAD MAC
Switch Fabric with Embedded MACs
24x16=384 MII Pins
24x2=48 SMII Pins
BCM5208
Port 1
BCM5208
Port 24
BCM5226
Port 1
BCM5226
BCM5226
BCM5226
Port 24
OVERVIEW
TXD [3:0]
4
TD+/-
Multimode
Xmt DAC
10BASE-T
PCS
TXEN
TXER
TXC
12
TXD [1:0]
TXEN
Auto
MDIX
Baseline
Wander
Correction
MII to
RMII
or
SMII
REF_CLK
COL
RXC
100BASE-X
PCS
Digital
Adaptive
Equalizer
CRS
RXDV
RXER
RXD[3:0]
2
4
CRS_DV
RX_ER
RXD[1:0]
RD+/-
ADC
SD+/-
2
CRS/Link
Detection
Auto-
Negotiation/
Link Integrity
RFF_CLK
Clock
Generator
Clock
Recovery
BIAS
Bias
Generator
MDC
JTAG
5
JTAG
TAP+BS
MII
Registrers
MII
Mgmt
Control
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 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 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 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
© 2004 by BROADCOM CORPORATION. All rights reserved.
5226-PB06-R
04/07/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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