BCM52681E数据手册Broadcom中文资料规格书

描述 Description

The Broadcom® BCM52681E is an octal 10/100BASETX transceiver for Fast Ethernet switches. The device contains eight full-duplex 10BASE-T/100BASE-TX Fast Ethernet transceivers, each of which performs all of the physical layer interface functions for 10BASE-T Ethernet on categories 3, 4, or 5 unshielded twistedpair (UTP) cable and 100BASE-TX Fast Ethernet on Category 5 UTP cable. 100BASE-FX mode is supported through external fiber-optic transceivers. The BCM52681E is a highly integrated solution using 65 nm technology, combining digital adaptive equalizers, ADCs, phase-locked loops, line drivers, encoders, decoders, echo cancelers, crosstalk cancellers, and all other required support circuitry integrated into a single monolithic CMOS chip. The BCM52681E complies with the IEEE 802.3® specification, including the auto-negotiation subsections. The BCM52681E design results in robust performance over a broad range of operating scenarios. Problems inherent to mixed-signal implementations, such as analog offset and on-chip noise, are eliminated by employing field-proven digital adaptive equalization and digital clock recovery techniques

特性 Features

• 10BASE-T/100BASE-TX IEEE 802.3u-compliant
• Source Synchronous SMII (SSSMII)
• S3MII MAC Interface for connection to low-cost 10/100 switches
• Fully integrated digital adaptive equalizers
• 100BASE-FX capability
• 125 MHz clock generator and timing recovery
• HP auto-MDIX: Auto-negotiation or Forced
• Advanced cable plant diagnostics which detect cable plant impairments – Programmable serial LED pins – Programmable parallel LED pins – Robust cable ESD (CESD) tolerance – Low EMI emissions – Support for jumbo packets up to 18 KB in size – IEEE 1149.1 (JTAG) and NAND-chain ICT support – Compatible with 3.3V I/O– Package: 17 mm x 17 mm 256-pin FBGA
• Synchronous Ethernet support
• IEEE 802.3az-compliant support– Support for native Energy Efficient Ethernet ™ (EEE) MACs – Support for legacy non-EEE MAC using AutogrEEEn® mode
• Supports IEEE 1588™ 

应用 Application

• Routers
• Switches
• Servers
• Blade Servers
• Gaming Devices