Microsemi Corporation ZL30122GGG

Description
The ZL30122 is a lowjitter line card synchronizer that synchronizes with standard telecom system references and synthesizes a wide variety of protected telecom line interface clocks that are compliant with Telcordia GR253CORE and ITUT G.813. It provides three reference inputs which support clock frequencies with any multiples of 8 kHz up to 77.76 MHz in addition to 2 kHz. The ZL30122 also provides three sync inputs for output frame pulse alignment and generates several styles of output frame pulses with selectable pulse width, polarity, and frequency.

Features
Synchronizes with standard telecom system references and synthesizes a wide variety of protected telecom line interface clocks that are compliant with Telcordia GR253CORE and ITUT G.813
Internal APLL provides standard output clock frequencies up to 622.08 MHz with jitter <3 psRMS suitable for GR253CORE OC12 and G.813 STM16 interfaces
Programmable output synthesizer generates clock frequencies from any multiple of 8 kHz up to 77.76 MHz in addition to 2 kHz
Digital Phase LockedLoop (DPLL) provides all the features necessary for generating SONET/SDH compliant clocks including automatic hitless reference switching, automatic mode selection (locked, freerun, holdover), and selectable loop bandwidth
Provides 3 reference inputs which support clock frequencies with any multiples of 8 kHz up to 77.76 MHz in addition to 2 kHz
Provides 3 sync inputs for output frame pulse alignment
Generates several styles of output frame pulses with selectable pulse width, polarity, and frequency
Configurable input to output delay, and output to output phase alignment
Flexible input reference monitoring automatically disqualifies references based on frequency and phase irregularities
Supports IEEE 1149.1 JTAG Boundary Scan

Applications
SONET/SDH line cards
Telecom equipment
Test and measurement equipment