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Product Overview

The VSC8504-02 is a low-power, quad-port Gigabit Ethernet transceiver with four SerDes interfaces for quad-port dual media capability. It also includes an integrated quad port two-wire serial multiplexer (MUX) to control SFPs or PoE modules. It has a low electromagnetic interference (EMI) line driver, and integrated line side termination resistors that conserve both power and printed circuit board (PCB) space.

The VSC8504-02 includes dual recovered clock outputs to support Synchronous Ethernet applications. Programmable clock squelch control is included to inhibit undesirable clocks from propagating and to help prevent timing loops. The VSC8504-02 also supports a ring resiliency feature that allows a 1000BASE-T connected PHY port to switch between master and slave timing without having to interrupt the 1000BASE-T link.

Key Features

This section lists the main features and benefits of the VSC8504-02 device.

Low Power

? Low power consumption of approximately 425 mW per port in 1000BASE-T mode, 200 mW per port

in 100BASE-TX mode, 225 mW per port in 10BASE-T mode, and less than 115 mW per port in

100BASE-FX and 1000BASE-X modes

? ActiPHY? link down power savings

? PerfectReach? smart cable reach algorithm

? IEEE 802.3az-2010 Energy Efficient Ethernet idle power savings

Advanced Carrier Ethernet Support

? Recovered clock outputs with programmable clock squelch control and fast link failure indication

(<1 ms; worst-case <3 ms) for G.8261 Synchronous Ethernet applications

? Ring resiliency for maintaining linkup integrity when switching between 1000BASE-T master and

slave timing

? Supports IEEE 802.3bf timing and synchronization standard

? Integrated quad two-wire serial mux to control SFP and PoE modules

? Support for IEEE 802.3ah unidirectional transport for 100BASE-FX and 1000BASE-X fiber media

Wide Range of Support

? Compliant with IEEE 802.3 (10BASE-T, 100BASE-TX, 1000BASE-T, 100BASE-FX, and

1000BASE-X) specifications

? Support for >16 kB jumbo frames in all speeds with programmable synchronization FIFOs

? Supports Cisco QSGMII v1.3, Cisco SGMII v1.9, 1000BASE-X MACs, IEEE 1149.1 JTAG boundary

scan, and IEEE 1149.6 AC-JTAG

? Available in a low-cost, 256-pin BGA package with a 17 mm × 17 mm body size

Flexibility

? VeriPHY? cable diagnostics suite provides extensive network cable operating conditions and status

? Patented, low EMI line driver with integrated line side termination resistors

? Four programmable direct-drive LEDs per port with adjustable brightness levels using register

controls; bi-color LED support using two LED pins

? Serial LED interface option

? Extensive test features including near end, far end, copper media connector, SerDes MAC/media

loopback, and Ethernet packet generator with CRC error counter to decrease time-to-market