MAXIM MAX3770CEE

The MAX3770 is a 2.125Gbps Fibre Channel repeater IC. The MAx3771 provides a pin-compatible solution for 1.063Gbps Fibre Channel. Both devices are optimized for use in Fibre Channel arbitrated-loop applications and operate from a 3.3V supply. The MAX3770 consists of a fully integrated phase-locked loop (PLL), CML input and output buffers, and a data latch. The PLL consists of a phase/frequency detector (PFD), a loop filter, and a voltage-controlled oscillator (VCO). The input and output signal buffers employ low-noise CML architecture and are terminated on-chip. The phase/frequency detector generates an output signal that reflects the phase relationship between the incoming data and the internal clock generated by the VCO. Data recovery is accomplished by feedback in the PLL, which drives the error voltage to zero, aligning the falling edge of the recovered clock to the center of the data eye. The fully integrated VCO contains an internal current reference and filter circuitry to minimize the influence of Vcc noise. The VCO is trimmed to 2.125GHz (MAX3770) and creates a clock output with frequency proportional to the control voltage applied by the loop filter. Data recovery is accomplished by using the recovered clock signal to latch the incoming data to the CML output buffers, significantly reducing the output jitter.

• Meet Fibre Channel Jitter Tolerance Requirements
• 3.0V to 3.6V Operation
• Internally Terminated Data and Clock IO
• Reference Clock Not Required
• Frequency Lock Indication
• Low Power Consumption: 215mW at 3.3V (MAX3770), 190mW at 3.3V (MAX3771)

• 2.125Gbps Fibre Channel Storage Area Networks
• 1.063Gbps Fibre Channel
• Fibre Channel Hubs
• Fibre Channel Storage Systems