BCM5488 Broadcom, BCM5488 Datasheet - Page 2

• Manufacturer Part Number: BCM5488
• Description: Octal Port 10/100/1000Base-T Gigabit Ethernet Transceiver
• Manufacturer: Broadcom

The BCM5488 consists of eight complete 10/100/1000BASE-T Gigabit
Ethernet transceivers integrated on a single monolithic CMOS chip. The
BCM5488 is optimized for low power and small footprint size to enable
high-port density applications. By lowering system cost and reducing
power dissipation by nearly 30 percent, the BCM5488 enables a new
class of cost-effective Gigabit Ethernet equipment, driving the delivery
of Gigabit Ethernet bandwidth to the desktop.
The BCM5488 DSP-based architecture and advanced power
management techniques combine to achieve robust and low-power
operation over existing Category 5 twisted-pair wiring. The BCM5488
architecture not only meets the requirements of IEEE 802.3,
IEEE 802.3u, and IEEE 802.3ab but also maintains the industry’s
highest level of margin over IEEE requirements for echo, near-end
crosstalk (NEXT), and far-end crosstalk (FEXT). Low power is the key
to implementing high-density Gigabit Ethernet switches, and the
BCM5488 has the lowest power in the industry at less than 625 mW per
port. In addition, the BCM5488 has extremely low EMI emissions,
which reduces the design constraints required to meet EMI radiation
specifications.
The BCM5488 supports the RGMII, SGMII, and SerDes MAC
interfaces. The RGMII, SGMII, and serial SerDes interfaces are reduced-
pin-count (12, 6, and 4, respectively, versus 25) versions of the GMII.
The RGMII clock timing can be adjusted to eliminate the board trace
delays required by the RGMII specification. These reduced-pin-count
interfaces simplify design and lower system cost by reducing the number
of layers required to route high-density solutions. In addition, these
interfaces allow fewer pins at the MAC/switch, which reduces the MAC/
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
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© 2005 by BROADCOM CORPORATION. All rights reserved.
5488-PB00-R
®
, the pulse logo, QuadSquad™, Connecting everything
04/15/05
TRD{8} [4:1]+
TRD{7} [4:1]+
TRD{6} [4:1]+
TRD{5} [4:1]+
TRD{4} [4:1]+
TRD{3} [4:1]+
TRD{2} [4:1]+
TRD{1} [4:1]+
REFCLK[1]
REFCLK[2]
RDAC[1]
RDAC[2]
RESET
®
Auto -negotiation
Correction
Baseline
W ander
Clock Generator
Bias Generator
PGA
Reset
TX DAC
ADC
®
, and the Connecting everything
O V E R V I E W
Tim ing and Phase
Echo Canceler
Recovery
FFE
switch cost by enabling smaller die sizes than would be possible with full
GMII.
This device is another member of Broadcom’s 0.13-µm Gigabit Ethernet
copper PHY family, joining more than a dozen other quad and single
products. The 0.13-µm process is the optimal process that offers the best
performance, lowest cost, and lowest power for Gigabit Ethernet copper
solutions. Devices based on the 0.13-µm process offer an excellent long-
term cost curve, enabling better cost reduction over time (compared to
older technologies) without having to redesign or requalify a new part.
Each BCM5488 port is fully independent and has individual interface,
control, and status registers, and incorporates a number of advanced
features. A link-quality indicator LED gives installers an instant visual
indication if there are any problems with the wiring plant supporting
operation at the preferred speed. This includes physical wiring defects
that the BCM5488 cannot automatically correct for and channel
conditions such as excessive cable length and return loss, crosstalk, echo,
and noise. Broadcom’s CableChecker software can be used with the
device to provide remote management of the cable and a first level of
diagnostics and fault isolation.
The BCM5488 has the industry's highest tolerance to electrostatic
discharge (ESD). This prevents ESD damage not only during
manufacturing but also during CESD events in the field. CESD is an
ESD event that occurs when an electrically charged network cable is
plugged into a network port. This is an issue that has become more
prevalent with contemporary cable installations, and the BCM5488 can
tolerate well over 3kV of CESD.
MII Registers
Crosstalk
Canceler
DFE and
Decoder
Trellis
SGMII
LED Interface
Managem ent
Control
M II
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
SGOUT {8:1}+
SGIN{8: 1}+
SCLK {8:1}+
LED [1] {8:1}
LED[ 2]{8: 1}
LED[ 3]{8: 1}
LED[ 4]{8: 1}
MDIO[ 1]
MDC[2]
MDIO[2]
MDIO_SEL
PHYAD[ 4:0]
INTF_SEL[3:0]
MDC[1]