53128-DS07-R
Corporate Headquarters: San Jose, CA April 6, 2016
Data Sheet
BCM53128
Multiport Gigabit Ethernet Switches
GENERAL DESCRIPTION
The Broadcom
®
BCM53128 is a highly integrated,
cost-effective unmanaged-smart gigabit switch. The
switch design is based on the field-proven, industry-
leading ROBO architecture. This device combines
all the functions of a high-speed switch system
including packet buffers, PHY transceivers, media
access controllers (MACs), address management,
port-based rate control, and a non-blocking switch
fabric into a single 65-nm CMOS device. Designed
to be fully compliant with the IEEE 802.3™ and
IEEE 802.3x specifications, including the MAC-
control PAUSE frame, the BCM53128 provides
compatibility with all industry-standard Ethernet,
Fast Ethernet, and Gigabit Ethernet (GbE) devices.
The BCM53128 has a rich feature set suitable for
not only standard GbE connectivity for desktop and
laptop PCs, but also for next-generation gaming
consoles, set-top boxes, networked DVD players,
and home theater receivers. It is also specifically
designed for next generation SOHO/SMB routers
and gateways.
The BCM53128 contains eight full-duplex 10/100/
1000BASE-TX Ethernet transceivers.
The BCM53128 provides 70+ on-chip MIB counters
to collect receive and transmit statistics for each
port.
The BCM53128 is available in commercial
temperature (C-Temp) and industrial temperature (I-
Temp) rated packages. The BCM53128 is provided
in a 256-pin eLQFP (28 mm x 28 mm) package.
FEATURES
• Nine 10/100/1000 media access controllers
• Eight port 10/100/1000BASE-T/Tx transceivers
• One GMII/RGMII/MII/RvMII/TMII/RvTMII
interface for an in-band management port (IMP)
for connection to a CPU/management entity
without PHY
• IEEE 802.1p, MAC, Port, TOS, and DiffServ QoS
for four queues, plus two time sensitive queues
• Port-based VLAN
• IEEE 802.1Q-based VLAN with 4K entries
• MAC-based trunking with automatic link failover
• Port-based rate control
• Port mirroring
• BroadSync
®
HD for IEEE 802.1AS support
– Timestamp tagging at MAC interface
– Time-aware egress scheduler
• DOS attack prevention
– Support IPv6
• IGMP snooping, MLD snooping support
• Green mode support
• Spanning tree support (multiple spanning trees–
up to eight)
• Loop detection for unmanaged configurations
with Broadcom’s patented LoopDTech™
technology
• CableChecker™ with unmanaged mode support
• Double tagging/QinQ
• IEEE 802.az EEE (Energy Efficient Ethernet)
support
• IEEE 802.3as support
• IEEE 802.3x programmable per-port flow control
and backpressure, with IEEE 802.1x support for
secure user authentication
• EEPROM, MDC/MDIO, and SPI Interfaces
• Serial Flash Interface for accessing embedded
8051 processor
• 4K entry MAC address table with automatic
learning and aging
• 192 KB packet buffer
• 256 multicast group support
• Jumbo frame support up to 9720 bytes
• Serial and parallel LED interface
• 1.2V for core and 3.3V for I/O
• JTAG support
• 256 eLQFP