SY89423V

Micrel 5V/3.3V DUAL HIGH-PERFORMANCE PHASE LOCKED LOOP Precision Edge® Precision ESYd8g94e2®3V SY89423V NOT RECOMMENDED FOR NEW DESIGNS FEATURES s 3.3V and 5V power supply options s 1.12GHz maximum VCO frequency s 30MHz to 560MHz reference input operating frequency s External 2.0GHz VCO capability s Frequency doubler mode s Low jitter differential design s PECL differential outputs s External loop filter optimizes performance/cost s Available in 44-pin PLCC package APPLICATIONS s Workstations s Advanced communications s High-performance computing PIN CONFIGURATION NC VCCOA FOUTA FOUTA VCC VCC NC FOUTB FOUTB VCCOB NC NC HFOUTA HFOUTA S1A S2A F1A F2A S3A S5B HFINA HFINA 6 5 4 3 2 1 44 43 42 41 40 7 39 8 38 9 37 10 36 11 TOP VIEW 35 12 PLCC 34 13 J44-1 33 14 32 15 31 16 30 17 29 18 19 20 21 22 23 24 25 26 27 28 NC HFOUTB HFOUTB S1B S2B F1B F2B S3B S4B HFINB HFINB DESCRIPTION The SY89423V device consists of two identical, low jitter, digital Phase Locked Loops based on Micrel-Synergy's differential PLL technology. Each PLL is capable of operating in the 30MHz to 560MHz reference input frequency range, and is independent of the other, and is configurable separately. The PLLs can be configured to be matched in all regards, or can be configured so that PLLB is used as a frequency doubler, while PLLA is used to regenerate the undoubled frequency. Each PLL is capable of operating up to 2000MHz with the HFIN input and an external VCO. Two reference inputs (RIN...