BCM5238

Features:

*Single-chip, eight-port Fast Ethernet transceiver
*Low-power 1.8V CMOS technology
*Serial Media Independent Interface (SMII)
*Source Synchronous SMII (SSSMII)
*HPAuto-MDIX automatic crossover
*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 PQFPor 256-ball BGApackage
*Proven Broadcom proprietary all-DSPDigi-(TM) architecture




Description

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, auto-negotiation and SMII / SSSMII management functions. The BCM5238 is compliant with the IEEE 802.3 standard.

The BCM5238 can be connected to a switch controller through the SMII on one side and to the network media on the other side through isolation transformers. The BCM5238 operates from a 1.8V core voltage, with transformer center taps connected to either 2.5V or 3.3V. The I/O operates at either 2.5V or 3.3V.