bcm5478 Broadcom Corp., bcm5478 Datasheet

bcm5478

Manufacturer Part Number

bcm5478

Description

Octal-port 10/100/1000base-t Gigabit Ethernet Transceiver

Manufacturer

Broadcom Corp.

Datasheet

1.BCM5478.pdf (2 pages)

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OCTAL-PORT 10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER

•

Eight fully integrated 10BASE-T/100BASE-TX/1000BASE-T

Gigabit Ethernet transceivers

RGMII, SGMII, and SerDes MAC interface options

1-Gbps lineside SerDes with RGMII MAC interface

Fully compliant with IEEE 802.3, IEEE 802.3u, and

IEEE 802.3ab standards

0.13-micron CMOS—low power and cost

Supports copper or fiber in RGMII mode

Low power

• <600 mW per port

• Advanced power management

Trace-matched output impedance

Lineside loopback

Low EMI emissions

Cable plant diagnostics

• Cable plant analyzer function detects cable plant impairments.

• Link quality indication LED.

• Automatic detection and correction of wiring pair swaps, pair

• Automatic MDI/MDIX crossover at all speeds.

Robust cable-sourced electrostatic discharge (CESD) tolerance

Support for jumbo packets up to 10 KB

IEEE 1149.1 (JTAG) boundary scan

Package: 484-pin PBGA

skew, and pair polarity.

F E A T U R E S

BCM5478 System Diagram

Gigabit Ethernet

10/100/1000BASE-T

Transceiver

BCM5478

•

BCM5478

Low-power, octal-port integration enables single-row,

high-port density switches.

• Lowers system costs by eliminating PCB layers required for

• Reduced I/O pin requirements with RGMII (over 50%), SGMII

• Clock timing can be adjusted to eliminate board trace delays

• Lowers MAC/switch costs by reducing the number of pins

Provides compatibility with IEEE standard devices operating

at 10, 100, and 1000 Mbps at half-duplex and full-duplex.

Lowers system BOM cost and simplifies system design.

Eases system level debug.

Enables use of low-cost magnetics, even in high-density (48+)

designs.

Cable diagnostic function characterizes cable plant condition

and immediately indicates cabling issues.

• Prevents erroneous equipment return due to bad cable plants.

• Prevents manufacturing fallout due to bad cable plants.

Over 3 kV of CESD tolerance prevents equipment damage and

return.

Operates with larger packets for wider range of packet

protocol support and improved efficiency.

Ease of manufacturing with JTAG support, simplified power

supply, and multiple MAC interfaces.

routing high-density solutions.

(over 75%), and SerDes (over 80%).

required by the RGMII specification.

required to interface with the PHY.

S U M M A R Y O F B E N E F I T S

Related parts for bcm5478

bcm5478 Summary of contents

Page 1

... Over CESD tolerance prevents equipment damage and return. • Operates with larger packets for wider range of packet protocol support and improved efficiency. • Ease of manufacturing with JTAG support, simplified power supply, and multiple MAC interfaces. BCM5478 System Diagram BCM5478 BCM5478 10/100/1000BASE-T Gigabit Ethernet Transceiver ...

Page 2

... Low power is the key to implementing high-density Gigabit Ethernet switches, and the BCM5478 has the lowest power in the industry at less than 600 mW per port. In addition, the BCM5478 has extremely low EMI emissions, which reduces the design constraints required to meet EMI radiation specifications ...

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