ADVANCE DATA SHEET
BCM5461S
5461S-DS03-R
16215 Alton Parkway�P.O. Box 57013•Irvine, California 92619-7013•Phone: 949-450-8700•Fax: 949-450-871012/09/03
10/100/1000BASE-T Gigabit Ethernet Transceiver
GENERAL DESCRIPTION
FEATURES
The BCM5461S consists of a triple-speed 1000BASE-T/
100BASE-TX/FX/10BASE-T Gigabit Ethernet transceiver
integrated into a single monolithic CMOS chip. The
device performs all physical-layer functions for
1000BASE-T, 100BASE-TX/FX, and 10BASE-T Ethernet
on standard Category 5 UTP cable. 10BASE-T can also
run on standard Category 3, 4, and 5 UTP. The
BCM5461S also has a serial interface for connection to
serial MAC interface and fiber modules. The BCM5461S
is a highly integrated solution combining digital adaptive
equalizers, ADCs, phase-locked loops, line drivers,
encoders, decoders, echo cancellers, crosstalk
cancellers, and all required support circuitry. Based on
Broadcom’s proven Digital Signal Processor technology,
the BCM5461S is designed to be fully compliant with
RGMII, GMII, MII, TBI, and RTBI, allowing compatibility
with industry-standard Ethernet MACs and switch
controllers.
The BCM5461S includes a shared SerDes/SGMII
interface that can be connected to an SGMII MAC or a
SerDes/fiber transceiver. The BCM5461S supports
100BASE-FX optical modules through the twisted pair.
GBIC mode provides SerDes-to-copper translation
capability.
Designed for reliable operation over worst-case
Category5 cable, the BCM5461S automatically
negotiates with its link partner to determine the highest
possible operating speed. The device detects and
corrects most common wiring problems. The digital
nature of the BCM5461S allows data to be brought out for
displaying cable diagnostics, such as attenuation and
return loss, using available software.
APPLICATIONS
�1000BASE-T SFP/GBIC modules
•100BASE-FX
•Single-channel Gigabit SerDes
•Gigabit Ethernet switches and uplinks
•Fiber-to-copper media converters
•Single-chip integrated triple-speed Ethernet
transceiver—MAC to magnetics:
-1000BASE-T IEEE 802.3ab
-100BASE-TX IEEE 802.3u
-10BASE-T IEEE 802.3
•IEEE 802.3z
•GMII, RGMII, SGMII, SerDes, TBI, RTBI, and MII
MAC interface options
•Line-side copper and fiber (1000SX/LX and 100FX)
interfaces
•SerDes-to-copper translation for GBIC and media
converter applications
•Automatic auto-sense mode automatically configures
for dual medium applications
•Integrated voltage regulators
•Trace matched output impedance
•Line-side loopback
•Low EMI emissions
•Cable plant diagnostic
•Robust CESD tolerance
•Support for jumbo packets up to 10 KB
•Detection and correction of pair swaps (MDI
crossover), pair skew, and pair polarity
•Auto-negotiation with next page support
•125-MHz clock generator and timing recovery
•JTAG support
•Low-power, 1.2V CMOS core
•2.5V or 3.3V CMOS I/O
•Devices packages: 128-pin MQFP , 117-pin BGA, and
100-pin FBGA
Note: The 100-pin FBGA package does not support
GMII, TBI, RGMII, 100FX, or RTBI
4/22/2004D3PMQ
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