The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output. A unique FailSafe Input (FSI) protection prevents metastable output conditions when the input clock voltage swing drops significantly below 100mV or input is removed. 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 800mV, 100Kcompatible LVPECL with fast rise/fall times guaranteed to be less than 270ps. The SY89228U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89228U is part of Micrel’s high-speed, Precision Edge® product line.Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVPECL output Fail-Safe Input – Prevents oscillations when input is invalid Guaranteed AC performance over temperature and supply voltage: DC-to >1.0GHz throughput < 1500ps Propagation Delay (In-to-Q) < 270ps 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 800mV LVPECL output 46% to 54% Duty Cycle(÷ 3) 47% to 53% Duty Cycle(÷ 5) 2.5V ±5% or 3.3V ±10% supply voltage -40°C to +85°C industrial temperature range Available in 16-pin (3mm x 3mm) QFN package