ZL30407 ZL30407QCG1 ZARLINK Semiconductor QFP80 Clock Timing Integrated Circuits IC

SONET/SDH, Stratum IC 155.52MHz 1 Output 80-LQFP (14x14)

Description:

The ZL30407 Clock Timing Integrated Circuits IC is a Network Element Phase-Locked Loop designed to synchronize SDH and SONET systems. In addition, it generates multiple clocks for legacy PDH equipment and provides timing for STBUS and GCI backplanes.

The ZL30407 operates in NORMAL (LOCKED), HOLDOVER and FREE-RUN modes to ensure that in the presence of jitter, wander and interruptions to the reference signals, the generated clocks meet international standards. The filtering characteristics of the PLL are hardware or software selectable and they do not require any external adjustable components. The ZL30407 uses an external 20 MHz Master Clock Oscillator to provide a stable timing source for the HOLDOVER operation. The ZL30407 operates from a single 3.3 V power supply and offers a 5 V tolerant microprocessor interface.

Specification:IC PLL SONET/SDH CLK MULT 80LQFP

Applications

• Synchronization for SDH and SONET Network Elements

• Clock generation for ST-BUS and GCI backplanes

Environmental & Export Classifications

Ordering Information

ZL30407QCC 80 Pin LQFP Trays

ZL30407QCG1 80 Pin LQFP* Trays, Bake & Drypack *Pb Free Matte Tin -40°C to +85°C

Features:

• Meets requirements of GR-253 for SONET Stratum 3 and SONET Minimum Clocks (SMC)

• Meets requirements of GR-1244 for Stratum 3

• Meets requirements of G.813 Option 1 and 2 for SDH Equipment Clocks (SEC)

• Generates clocks for ST-BUS, DS1, DS2, DS3, OC-3, E1, E3, STM-1 and 19.44 MHz • Holdover accuracy of 4x10 -12 meets GR-1244 Stratum 3E and ITU-T G.812 requirements

• Continuously monitors both references for frequency accuracy exceeding ±12 ppm

• Provides “hit-less” reference switching • Compensates for Master Clock Oscillator accuracy

• Automatically detects frequency of both reference clocks and synchronizes to any combination of 8 kHz, 1.544 MHz, 2.048 MHz and 19.44 MHz reference frequencies

• Allows Hardware or Microprocessor control

• Pin compatible with ZL30410, ZL30402 and MT90401

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