The SY89871U is a 2.5V/3.3V LVPECL output precision clock divider capable of accepting a high-speed differential clock input (AC or DC-coupled) CML, LVPECL, HSTL or LVDS clock input signal and dividing down the frequency using a programmable divider ratio to create a frequencylocked lower speed version of the input clock (Bank B). Available divider ratios are 2, 4, 8, and 16. In a typical 622MHz clock system this would provide availability of 311MHz, 115MHz, 77MHz, or 38MHz auxiliary clock components. The differential input buffer has a unique internal termination design that allows access to the termination network through a VT pin. This feature allows the device to easily interface to different logic standards. A VREF-AC reference is included for AC-coupled applications. The SY89871U includes two phase-matched output banks. Bank A (QA) is a frequency-matched copy of the input. Bank B (QB0, QB1) is a divided down output of the input frequency. Bank A and Bank B maintain a matched delay independent of the divider setting.Two matched-delay outputs: - Bank A: undivided pass-through (QA) - Bank B: programmable divide by 2, 4, 8, 16 (QB0, QB1) Matched delay: all outputs have matched delay, independent of divider setting Guaranteed AC performance: >2.5GHz fMAX <250ps tr /tf <670ps tpd (matched delay) <15ps within-device skew Low jitter design - 231fs RMS phase jitter (Typ) Power supply 3.3V or 2.5V Unique patent-pending input termination and VT pin for DC- and AC- coupled inputs: any differential inputs (LVPECL, LVDS, CML, HSTL) TTL/CMOS inputs for select and reset 100K EP compatible LVPECL outputs Parallel programming capability Wide operating temperature range: -40°C to +85°C Available in 16-pin (3mm x 3mm) QFN package