SMII SMII SMII BCM5248 10/100BASE-TX OCTAL- TRANSCEIVER FEATURES SUMMARY OF BENEFITS Eight-port 10BASE-T/100BASE-TX/100BASE-FX Target usage: Fast Ethernet switches. transceiver Low-power dual-supply 2.5V/1.8V CMOS technology. HP Auto-MDIX automatically uncrosses cable pairs Smallest footprint per port available. Advanced CableChecker cable diagnostics software Measures 14 mm x 20 mm for eight ports. diagnoses and pinpoints cable faults to reduce supports calls Single-chip device contains eight independent Fast Ethernet Optimized for use with Broadcom s StrataSwitch Family transceivers. Cost effective process technology: 0.18u CMOS Performs all physical layer interface functions for 100BASE- TX full-duplex or half-duplex Ethernet on category 5 Serial Media Independent Interface (SMII) and Source unshielded twisted-pair (UTP) cable, 10BASE-T full-duplex or Synchronous SMII (SSSMII) half-duplex Ethernet on category 3, 4, or 5 UTP cable, and 100BASE-FX full-duplex or half-duplex on fiber optic cable. Fully programmable LED drivers and serial LED output Compliant with IEEE 802.3 standard. Low power: 200 mW per port IEEE 1149.1 (JTAG) scan chain support. Low-voltage core: 1.8V Fully customizable LED functions. Up to 8 LED signals per QFP or BGA package options port. Most widely deployed and reliable PHY architecture: Over a billion Broad- ports shipped 24-Port 10/100BASE-T Ethernet Switch Example STRATASWITCH GMII GMII BCM5461 BCM5461 Gigabit Gigabit EPIC EPIC EPIC PHY PHY BCM5248 BCM5248 BCM5248 OCTAL- OCTAL- OCTAL- Quad Quad Quad Quad Quad Quad Magnetics Magnetics Magnetics Magnetics Magnetics Magnetics RJ45 Stacked 2x6 RJ45 Stacked 2x6OVERVIEW TXD 3:0 Multimode TD+/- Xmt DAC TXEN TXD(1:8) TXER 10BASE-T SSYNC PCS TXC SSSMII TXC MII HP to COL Auto- SMII MDIX RXC SSSMII RSYNC CRS SSSMII RXC Digital RXDV 100BASE-X Adaptive RXD(1:8) PCS Equalizer ADC RXER RD+/- RXD 3:0 Cable Auto-Check SLED D0 Auto- Negotiation/ LED1 1:8 CRS/Link LED Link Integrity Detection Controller SD+/- LED2 1:8 LED CLK Clock Clock REF CLK Generator Recovery Bias BIAS Generator MDC MII MII Management JTAG Registers JTAG Control MDIO TAP+BS BCM5248 BCM5248 Reference Design The Broadcom BCM5248 is a single-chip device containing eight The BCM5248 contains an advanced cable diagnostic capability to independent Fast Ethernet transceivers. Each performs all of the physical detect shorts or opens in a UTP cable and the distance to the fault, layer functions for 100BASE-TX full- or half-duplex Ethernet on allowing system administrators to quickly determine the source of a category 5 UTP cable and 10BASE-T full- or half-duplex Ethernet on fault. Additionally, the BCM5248 can detect the length of a good, category 3, 4, or 5 UTP cable. The BCM5248 chip performs encoding operating link, which allows mapping of an entire physical cable plant. and decoding, clock and data recovery, digital adaptive equalization, line The BCM5248 includes support for HP Auto-MDIX which enables the transmission, carrier sense and link integrity monitoring, auto- transceiver to automatically detect and correct cable that is wired negotiation and SMII/SSSMII management functions. The BCM5248 is incorrectly. With the HP Auto-MDIX feature, all ports on a switch can compliant with the IEEE 802.3 standard. be connected to any other 10/100 port on any switch, hub, or network The BCM5248 offers alternative connection to fiber optic modules for interface card, using crossover or straight-through cables 100BASE-FX operation. The enhanced FX mode allows 100BASE-FX interchangeably. This makes installation, debugging, and maintenance operation without the use of signal detect pins. The standard FX mode of the network simpler and less expensive to the end user. allows 100BASE-FX operation with modules that require the PHY to In addition to two fully programmable LED driver pins per port, the use signal detect inputs to disable receive data in the absence of a BCM5248 also supports a serial LED driver output that can be used to received optical signal. drive up to eight LEDs per port, to indicate the status of link, speed, The BCM5248 can be connected to a switch controller through the SMII duplex, transmit or receive activity, or arbitrary functions programmed or SSSMII on one side and to the network media on the other side by the user. The BCM5248 is offered in a 128 PQFP and a 256-ball BGA through isolation transformers. The BCM5248 operates from 1.8 and package. 2.5V/3.3V power supplies the I/O operates at either 2.5V or 3.3V. Broadcom , the pulse logo, Connecting everything , and the Connecting everything logo are among the trademarks of Broadcom Corporation and/or its affiliates in the United States, certain other countries and/or the EU. Any other trademarks or trade names mentioned are the property of their respective owners. BROADCOM CORPORATION Phone: 949-450-8700 16215 Alton Parkway, P.O. Box 57013 Fax: 949-450-8710 Irvine, California 92619-7013 E-mail: info broadcom.com Web: www.broadcom.com 2006 by BROADCOM CORPORATION. All rights reserved. 5248-PB01-R 04/17/06