Synchronous Clock Generators

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. The unit has a fast acquisition time of about 1.5 seconds and it is tolerant of different reference duty cycles. The SCG4521 provides two types of output Logic The primary output is a differential LVPECL output at 155.52 MHz. The secondary output is a CMOS output at 51.84 MHz that is derived from the LVPECL output. Both outputs are phase aligned to the selected input reference. The SCG4521 includes an alarm output that indicates deviations from normal operation. If a Loss- of-Reference (LOR) or Loss-of-Lock (LOL) is detected the alarm with indicate the need for a reference rearrangement. If both references A and B are absent the module will enter Free Run operation. The FRstatus pin will indicate that the module is in Free Run operation. Frequency stability during Free Run operation is guaranteed to ±20 ppm. Additionally the Free Run mode may be entered manually. The package dimensions are 1” x 1” x .45” on a 6 layer FR4 board with castellated pins. Parts are assembled using high temperature solder to withstand 63/37 alloys, 180°C surface mount reflow processes. By Connor-Winfield VCXOs
SCG4521 's PackagesSCG4521 's pdf datasheet



SCG4521 Pinout, Pinouts
SCG4521 pinout,Pin out
This is one package pinout of SCG4521,If you need more pinouts please download SCG4521's pdf datasheet.

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