General Description

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.

特性 Features

? 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

Applications

? Fail-safe clock protection