GD16585 - Giga

GD16585 Transmitter MUX

GD16585 is a 9.95328 Gbit/s transmitter chip for use in SDH STM-64 and SONET OC-192 optical communication systems. GD16585 integrates all the main functions of the transmitter, which is clock generation, PLL circuits and multiplexer in a single monolithic IC. Hence only an external loop filter and a VCXO are required. The main functions of GD16585 are shown .

Features

l On-chip low noise VCO with a wide tuning range. Automated capture of the VCO frequency by a true phase and frequency detector. Retiming of MUX stage output with 10 GHz clock. Clock failure detection NLDET. Phase nulling circuit for easy interfacing with the system ASIC. 16:1 MUX with differential 622 Mbit/s LVDS data inputs. CML data input with 50 Ω internal load termination. LVDS compatible data and clock inputs with 100 Ω internal load termination. 622 MHz clock output for counter clocking. 155 MHz or 622 MHz reference clock input (selectable). Dual supply operation: -5.2 V and +3.3 V Low.