SY89231U

SY89231U 3.2GHz Precision, LVDS ÷3, ÷5 Clock Divider General Description The SY89231U is a precision, low jitter 3.2GHz ÷3, ÷5 clock divider with a LVDS output. The differential input includes Micrel’s unique, 3-pin internal termination architecture that allows the input to interface to any differential signal (AC- or DCcoupled) as small as 100mV (200mVPP) without any level shifting or termination resistor networks in the signal path. The outputs are 325mV, 100Kcompatible LVDS with fast rise/fall times guaranteed to be less than 200ps. The SY89231U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY89231U is part of Micrel’s high-speed, Precision ® Edge product line. All support documentation can be found on Micrel’s web site at: www.micrel.com. Precision Edge ® Features Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVDS output Guaranteed AC performance over temperature and supply voltage: – DC-to >3.2GHz throughput – <810ps Propagation Delay (In-to-Q) – <200ps Rise/Fall times Ultra-low jitter design: – <1psRMS random jitter – <1psRMS cycle-to-cycle jitter – <10psPP total jitter (clock) – <0.7psRMS MUX crosstalk induced jitter Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS) Wide input voltage range VCC to GND 325mV LVDS output 45% to 55% Duty Cycle (÷ 3) 47% to 53% Duty Cycle (÷ 5) 2.5V ±5% supply voltage -40°C ...