SY89200U

SY89200U Ultra-Precision 1:8 LVDS Fanout Buffer with Three ÷1/÷2/÷4 Clock Divider Output Banks Revision 6.0 General Description The SY89200U is a 2.5V precision, high-speed, integrated clock divider and LVDS fanout buffer capable of handling clocks up to 1.5GHz. Optimized for communications applications, the three independently controlled output banks are phase matched and can be configured for pass through (÷1), ÷2 or ÷4 divider ratios. The differential input includes Micrel’s unique, 3-pin input termination architecture that allows the user to interface to any differential signal path. The low-skew, low-jitter outputs are LVDS-compatible with extremely fast rise/fall times guaranteed to be less than 150ps. The EN (enable) input guarantees that the ÷1, ÷2 and ÷4 outputs will start from the same state without any runt pulse after an asynchronous master rest (MR) is asserted. This is accomplished by enabling the outputs after a fourclock delay to allow the counters to synchronize. The SY89200U is part of Micrel’s Precision Edge® product family. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Functional Block Diagram Precision Edge® Features Three low-skew LVDS output banks with programmable ÷1, ÷2 and ÷4 divider options Three independently programmable output banks Guaranteed AC performance over temperature and voltage: − Accepts a clock frequency up to 1.5GHz − <900ps IN-to-OUT propagation delay − <150ps rise/fall time − <50...