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BCM5461S

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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

Advance Data Sheet BCM5461S

12/09/03

Broadcom Corporation

Document5461S-DS03-RPage v

ABLE

ONTENTS

Section 1: Functional Description......................................................................................1

Overview.......................................................................................................................................................1

Modes of Operation.....................................................................................................................................2

Copper Mode..........................................................................................................................................2

Fiber Mode..............................................................................................................................................2

SGMII Mode............................................................................................................................................2

GBIC Mode.............................................................................................................................................2

Gigabit Media Independent Interface.........................................................................................................3

Media Independent Interface.......................................................................................................................4

Reduced Gigabit Media Independent Interface.........................................................................................4

10-Bit Interface.............................................................................................................................................4

Reduced 10-Bit Interface.............................................................................................................................4

Serial GMII Interface.....................................................................................................................................4

SerDes Interface (Complies with IEEE 802.3, Clauses 36 and 37)...........................................................5

Management Interface.................................................................................................................................6

Encoder.........................................................................................................................................................6

Decoder.........................................................................................................................................................6

Carrier Sense................................................................................................................................................7

Link Monitor..................................................................................................................................................7

Digital Adaptive Equalizer...........................................................................................................................8

Echo Canceler..............................................................................................................................................8

Crosstalk Canceler.......................................................................................................................................8

Analog-to-Digital Converter........................................................................................................................8

Clock Recovery/Generator..........................................................................................................................9

Baseline Wander Correction.......................................................................................................................9

Multimode TX Digital-to-Analog Converter................................................................................................9

Stream Cipher...............................................................................................................................................9

Wire Map and Pair Skew Correction.........................................................................................................10

Automatic MDI Crossover.........................................................................................................................10

10/100BASE-T Forced Mode Auto-MDIX..................................................................................................11

Auto-Negotiation........................................................................................................................................11

Copper Mode........................................................................................................................................11

4/22/2004D3PMQ

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