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| BCM5208 PRODUCT Brief OF BENEFITS BCM5208 10/100BASE-TX QUAD-TM TRANSCEIVER BCM5208 FEATURES SUMMARY * The Broadcom * * * * * * * * * * * * * * * * * BCM5208 is a Quad- 10/100BASET Transceiver that contains four 10BASE-T/100BASE-TX transceivers 10BASE-T/100BASE-TX/FX IEEE 802.3u-compliant Full-duplex Support in All Modes IEEE 802.3u-compliant Auto-Negotiation Media Independent Interface (MII) for Each Port Shared MII Serial Management Interface Fully-integrated Digital Adaptive Equalizers 125 MHz Clock Generator and Timing Recovery Integrated Multimode Transmit Wave Shaping Integrated Baseline Wander Correction Carrier Integrity Monitor on Each Port Port Switching for Multisegment Repeaters MII Repeater Mode Support in All Modes LED Status Pins Loop-back Mode for Diagnostics IEEE 1149.1 (JTAG) Support 3.3V Power Supply 208-Pin PQFP Package (R) * Fully-integrated TX/FX Quad PHY Transceiver (MII to TX Magnetics/FX Optics) * Increases system port density * Decreases system cost per port * Simplifies system and board design * Reduces power consumption * On-chip Multimode Transmit Wave Shaping * Eliminates need for external filters * Minimizes EMI * Flexible Ethernet PHY Solution: * 10BASE-T, 100BASE-TX or 100BASE-FX full* duplex Suited for both Ethernet switch and repeater products * Digital Adaptive Equalization and Clock Recovery * Increases SNR by 3dB over ideal analog equalizers * Robust performance in harsh noise environments and * * over sub-standard cable Immune to on-chip noise and crosstalk Insensitive to variations in process, temperature and voltage 24-Port 10/100BASE-T Ethernet Switch Example MAC BCM5208 10/100BASE-TX QUAD-TM Transceiver MAC MAC MAC Switching Engine Switch Module MP MAC Memory Logic BCM5208 10/100BASE-TX QUAD-TM Transceiver MAC MAC MAC BCM5208 OVERVIEW 16 TD+/-{1:4} TXD[3:0] {1:4} TXEN {1:4} TXER{1:4} TXC 8 Multimode TX DAC Baseline Wander Correction 10BASE-T PCS 4 4 4 COL/RXEN {1:4} RXC {1:4} CRS {1:4} RXDV {1:4} RXER {1:4} RXD[3:0] {1:4} 100BASE-T PCS Digital Adaptive Equalizer 4 4 4 4 4 4 16 RD+/-{1:4} 8 S/H ADC SD+/-{1:4} CRS/Link Detection 8 Clock Generator Bias Generator JTAG TAP+BS Clock Recovery AutoNegotiation/ Link Integrity LNKLED {1:4} COLLED {1:4} 100LED {1:4} FDXLED {1:4} XMTLED {1:4} RCVLED {1:4} LED Drivers 4 4 4 4 CK25 BIAS 3 5 20 MODES MDC MDIO JTAG MII Registers MII Mgmt Control The BCM5208 is a monolithic CMOS integrated circuit containing four transceivers that each perform all the physical layer interface functions for 10BASE-T Ethernet on CAT 3, 4, 5 unshielded twisted pair (UTP) cable, 100BASE-TX Ethernet on CAT5 UTP cable, and 100BASE-FX Ethernet on 62.5/125-m multimode fiber optic cable. The BCM5208 employs the use of digital signal processing and full custom circuit design techniques to create a highly integrated and robust physical layer solution for Fast Ethernet switches and multisegment repeaters. It complies fully with the IEEE 802.3u physical layer Media Independent Interface (MII) and autonegotiation subsections, providing compatibility with all industry-standard Fast Ethernet MAC and repeater chips. The BCM5208 chip performs all the 4B5B, MLT3, NRZI, and Manchester encoding and decoding; clock and data recovery; stream cipher scrambling/descrambling; digital adaptive equalization; line transmission; carrier sense and link management functions. The BCM5208 may be connected to a MAC or repeater controller through the MII on one side, and connects directly to the network media on the other side (through isolation transformers for UTP mode or fiber optic transmitter/receiver components for FX modes). In repeater mode, the MII ports may be bussed with other BCM5208 devices. Port multiplexing logic also allows the BCM5208 to be optimized for multisegment repeater configurations. Broadcom and the Broadcom Logo are registered trademarks of Broadcom Corporation. Quad- is a trademark of the Broadcom Corporation. For more information please contact us at: Phone: 949-450-8700, FAX: 949-450-8710 Email: info@broadcom.com Visit our web site at: www.broadcom.com (c) 1999 BROADCOM CORPORATION BCM5208.1PB3.15.99 BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 |
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