10/100BASE-TX/FX Mini-Φ™ Transceiver
FEATURES
• Power Supply: 2.5V or 3.3V
• Integrated voltage regulator to allow operation from a single
supply source
• Power Consumption: <175 mW
• Unique energy detection circuit to enable intelligent power
management
• HP Auto-MDIX
• Cable leCM GROUPh indication
• Cable noise level indication
• Robust CESD tolerance
• Cable leCM GROUPh greater than 145 meters
• Well under 10 PPM defect ratio quality
• ±10% voltage tolerance
• Industrial temperature range (–40°C to 85°C) package options
available
• MII and RMII configurable
• IEEE 1149.1 (JTAG) scan chain support
• MII management via serial port
• Layout compatible with BCM5201
• 10BASE-T/100BASE-TX/FX IEEE 802.3u Fast Ethernet transceiver
• Glueless TX-to-FX media conversion
• 64-pin TQFP with 64-pin BGA package, 48-pin KML package;
RoHS 5/6 and 6/6 package options available
SUMMARY OF BENEFITS
• Low power and intelligent power management
• Increased active working time
• Prolonged battery life in active standby
• Increased reliability
• Improved ease of use and installation, reduced support cost
• Straight-through or crossover cables are accommodated, and such
accommodation is independent of installation
• Advanced cable diagnostic features to enable remote monitoring
and debug of cabling infrastructure
• Resistance to cable-sourced electrostatic discharge (CESD) to
reduce product destruction and product returns
• DSP-based Signi-PHY™ architecture to ensure performance over
temperature, voltage, and process variation
• Proven in over two billion Fast Ethernet ports
• Ease of manufacturing with JTAG support
• Fully integrated TX/FX PHY transceiver (MII/RMII-to-TX magnetics
or FX optics)
• Lower system cost
• Simplified system and board design
APPLICATIONS
• Servers - Network Controller - Sideband Interface (NC-SI) using
RMII interface
• Digital TV, PCMCIA/CardBus cards, LAN on motherboard (LOM), IP
phones, cable modems, set-top boxes and print servers, wireless
access points, and embedded telecom
Embedded 10/100 BASE-TX Application
OVERVIEW
BCM5221 Block Diagram
The BCM5221: Lowest-Power Fast Ethernet PHY
With a power dissipation of 175 mW, the BCM5221 is the industry’s
lowest-power Fast Ethernet PHY. It features an integrated voltage
regulator, and can be supplied by either a 2.5V or 3.3V power
source. In addition, the BCM5221 has several intelligent power-down
states that conserve power, yet allow products based on it to
automatically turn on when needed.
The BCM5221 includes a unique Intelligent Power-Management feature
that powers down the device if energy is not detected on the cable.
This feature is especially useful for portable and power-sensitive
applications such as laptop LAN card adapters. The BCM5221 allows
PCMCIA or CardBus adapters to remain plugged in and draw virtually
no energy even if the client is no longer connected to the network.
Because most laptop users do not remove their LAN PC card when
working remotely, this feature results in a noticeably extended
battery life for laptop computer users.
The BCM5221 can be set to periodically wake up at a user-defined
interval, allowing the product to initiate keep-alive traffic on
the network. For lowest power consumption, the BCM5221 can be put
in a power-off state (<2.5 mW).
Network Tolerance
The BCM5221 includes features that simplify the installation and
maintenance of local area networks. One such feature is the HP
AutoMDIX capability, which automatically detects and corrects
crossed cables. With HP Auto-MDIX, the installer does not need to
know what is on the other end of the network cable: the BCM5221
automatically switches its transmit and receive circuitry to
accommodate the link partner’s polarity.
CESD is a recently discovered phenomenon that occurs when an
electrically charged network cable is plugged into a networked
product, an issue becoming more prevalent with recent cable
installations. The BCM5221 has been designed and tested to
withstand over 5 KV of CESD which, unlike other transceivers,
prevents the device from being destroyed in a CESD event.
DSP-Based PHY Technology
The BCM5221 builds on Broadcom's proven DSP PHY design and full
custom circuit design techniques to create a highly integrated and
robust physical layer solution. DSP techniques allow the BCM5221 to
achieve high interoperability and to exhibit robust performance
across voltage (±10%), temperature (–40°C to 85°C), and process
variations. Broadcom's DSP-based, Digi- ™ technology has been
proven in the shipment of over two billion Fast Ethernet ports.
Broadcom's superior quality has resulted in a failure rate well
under 10 PPM.
Applications
Applications for the BCM5221 that take advantage of its low power
and high network tolerance:
• Servers - Network Controller - Sideband Interface (NC-SI) using
RMII interface
• Cable modems
• Digital TV
• Set-Top boxes
• PCMCIA/CardBus cards
• Print servers
• LAN on motherboard (LOM)
• Wireless Access Points (WAP)
• IP phones
• Embedded telecom
