SY89312VMG-TR

SY89312V 3.3V/5V, 4GHz PECL/ECL ÷2 Clock Generator Precision Edge® General Description The SY89312V is an integrated ÷2 divider with differential clock inputs. It is functionally equivalent to the SY100EP32V but in an ultra-small 8-pin QFN package that features a 70% smaller footprint. The VBB pin, an internally generated voltage supply, is available for this device only. For single-ended input conditions, the unused differential input is connected to VBB as a switching reference voltage. VBB can also bias ACcoupled inputs. When used, decouple VBB and VCC via a 0.01µF capacitor and limit current sourcing or sinking to 0.5mA. When not in use, VBB should be left open. The reset pin is asynchronous and is asserted when it is high. Upon power-up, the internal flip-flops will be in a random state; the reset allows for the synchronous use of multiple SY89312Vs in a system. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Precision Edge Features • Guaranteed AC performance over temperature and voltage: • >4GHz fMAX input •