BCM5401 - 10/100/1000BASE-T Gigabit Ethernet Transceiver

10/100/1000BASE-T Gigabit Ethernet Transceiver

The BCM5401 is a second-generation 10/100/1000BASE-T Gigabit Ethernet transceiver for Category 5 unshielded twisted-pair (UTP) wiring. Based on the field proven architecture of the BCM5400, it provides lower power, enhanced cable reach, improved bit error rate performance, and advanced testability and diagnostics over firstgeneration transceivers. The device provides a complete GMII-tomagnetics solution for 10BASE-T, 100BASE-TX, and 1000BASE-T. It also provides a TBI-to-magnetics (10-bit interface) solution for designs using fiber Gigabit Ethernet ASICS. All necessary support circuitry is integrated, including the magnetic hybrid and an on-chip clock generator to provide a low-jitter, 125-MHz system clock.

Low power is achieved through the use of 0.22 CMOS technology that operates the internal analog circuitry at 2.5V and the digital logic at 1.8V, and through dynamic power management that disables unused portions of the Digital Signal Processor (DSP) architecture when not needed. A special Wake on LAN mode is included to support the lowpower requirements for PC adapters and LAN on motherboard (LOM) applications.

  • Fully integrated 10BASE-T/100BASE-TX/1000BASE-T Gigabit Ethernet transceiver
  • Digital Signal Processor (DSP) based design offering robust, fully adaptive performance and simplified board design
  • Provides robust operation at 1000 Mbps on existing CAT 5 cable plants.
  • Dynamically senses and adapts to changes in the channel conditions of the cable plant.