SCG4521 Overview
The SCG4521 is a mixed-signal phase locked loop generating LVPECL outputs from an intrinsically low jitter, voltage controlled, crystal oscillator. The LVPECL outputs may be disabled. The SCG4521 can lock to one of two external references, which is selectable using the SELAB input select pin.
SCG4521 Key Features
- Dual 19.44 MHz Input References
- Primary 155.52 MHz LVPECL Outputs with Disable Function
- Secondary 51.84 MHz CMOS Output
- Phase Locked Output Frequency Control
- Intrinsically Low Jitter Crystal Oscillator
- LOR & LOL Alarm
- Force Free Run Function
- Automatic Free Run operation on loss of both References A & B
- Input Duty Cycle Tolerant
- 3.3V dc Power Supply