BCM5238_04

BCM5238 ® 10/100BASE-TX OCTAL-Φ™ TRANSCEIVER FEATURES • • • • • • • • • • • • • Single-chip, eight-port Fast Ethernet transceiver Low-power 1.8V CMOS technology Serial Media Independent Interface (SMII) Source Synchronous SMII (SSSMII) HP Auto-MDIX automatic crossover Supports 10BASE-T Polarity Correction Compatible with 2.5V I/O and 3.3V I/O Fully integrated digital adaptive equalization Up to 150 meters of error-free operation Full-duplex support Interrupt output capability 128-pin PQFP or 256-ball BGA package Proven Broadcom proprietary all-DSP Digi-Φ™ architecture SUMMARY OF BENEFITS • Target usage: Fast Ethernet switches. • Lowest per port power solution available:< 215 milliwatts per port. • Smallest footprint per port available. • Measures 14 mm ∞ 20 mm for eight ports. • Single-chip device contains eight independent Fast Ethernet transceivers. • Performs all physical layer interface functions for 100BASETX full-duplex or half-duplex Ethernet on Category 5 unshielded twisted-pair (UTP) cable and 10BASE-T full or half-duplex Ethernet on Category 3, 4, or 5 UTP cable. • Compliant with IEEE 802.3 standard. • IEEE 1149.1 (JTAG) scan chain support. • Two LED indicator pins per port. BCM5421 Gigabit PHY BCM5421 Gigabit PHY BCM5238 OCTAL-Φ SMII Quad Magnetics Quad Magnetics Quad Magnetics BCM5238 OCTAL-Φ 24-Port 10/100BASE-T Ethernet Switch Example SMII Quad Magnetics Quad Magnetics BCM5238 OCTAL-Φ SMII Quad Magnetics OVERVIEW TXD [3:0] 4 TD+/Multimode Xmt DAC 10BASE-T PCS Auto-MDIX TXEN TXER TXC 8 TXD{1:8} SSYNC SSMII_TXC COL RXC 100BASE-X PCS Digital Adaptive Equalizer CRS RXDV RXER RXD[3:0] 4 MII to SMII 8 SSMII_RSYNC SSMII_RXC RXD{1:8} RD+/- ADC AutoNegotiation/ Link Integrity LED Controller Clock Generator Clock Recovery DTE Power Detection 2 INTR/SLED_DO LED1{1:8} LED2{1:8} 2 S3MII_DIS/SLED_CLK RFF_CLK BIAS Bias Generator MDC JTAG 5 JTAG TAP+BS MII Registrers MII Mgmt Control MDIO The Broadcom BCM5238 is a single-chip device containing eight independent Fast Ethernet transceivers. Each performs all the physical layer functions for 100BASE-TX full- or half-duplex Ethernet on Category 5 UTP cable and 10BASE-T full- or half-duplex Ethernet on Category 3, 4, or 5 UTP cable. The BCM5238 chip performs encoding and decoding, clock and data recovery, digital adaptive equalization, line transmission, carrier sense and link integrity monitoring, autonegotiation and RMII/SMII management functions. The BCM5238 is compliant with the IEEE 802.3 standard. The BCM5238 can be connected to a switch controller through the SMII or SSSMII on one side and to the network media on the other side through isolation transformers. The BCM5238 operates from 1.8 and 2.5V/3.3V power supplies; the I/O operates at either 2.5V or 3.3V. The BCM5238 includes support for HP Auto-MDIX, which enables the transceiver to automatically detect and correct miswired cable. With the HP Auto-MDIX feature, all ports on a switch can be connected to any other 10/100 port on any switch, hub, or network interface card, using crossover or straight-through cables interchangeably. This makes installation, debugging, and maintenance of the network simpler and less expensive to the end user. The BCM5238 is offered in a 128-pin PQFP or 256-ball BGA package and supports two LED indicators per port. Broadcom®, the pulse logo, and Connecting everything® are trademarks of Broadcom Corporation and/ or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the property of their respective owners. ® BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 © 2004 by BROADCOM CORPORATION. All rights reserved. 5238-PB07-R 07/19/04 Phone: 949-450-8700 Fax: 949-450-8710 E-mail: info@broadcom.com Web: www.broadcom.com