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The AD9544BCPZ is a clock synthesizer/jitter eliminator, mainly used in 5G timing transmission, high precision synchronization and phased array radar application scenarios ‌. The AD9544BCPZ's 10 clock outputs are synchronized with one of up to four input reference voltage sources. A digital phase-locked loop (DPLL) reduces timing jitter associated with an external voltage reference source. With a digital control loop and hold circuit, a low jitter output signal can be continuously generated even if all reference inputs fail.

The AD9544BCPZ is available in a 48-pin LFCSP (7 mm x 7 mm) package with a temperature rating ranging from −40°C to +85°C.

The AD9544BCPZ has the following features:

Dual-channel DPLL synchronizes the physical layer clock from 1 Hz to 750 MHz, providing frequency conversion for a high-noise reference source and jitter purification

Complies with ITU-T G.8262 and Telcordia GR-253

Telcordia GR-1244, ITU-T G.812, G.813, G.823, G.824, and G.825 are supported

Continuous frequency monitoring and reference validation with frequency deviations as low as 50 ppb

The two DPLLS have 24-bit decimal dividers and 24-bit programmable modules

Programmable digital loop filter bandwidth: 10−4 Hz to 1850 Hz

Automatic and manual hold and reference switching provides zero latency, no interruptions or phase additions

Priority based programmable reference switching with manual, automatic recovery and automatic non-recovery modes

5 pairs of clock output pins, each available as differential LVDS/HCSL/CML or 2 single-ended outputs (1 Hz to 500 MHz)

2 differential or 4 single-ended input reference voltage sources

Cross-point multiplexers interconnect reference inputs to the PLL

Support for embedded (modulated) input/output clock signals

Fast DPLL lock mode

Provides internal functionality that combines the low phase noise of a crystal oscillator or crystal oscillator with the frequency stability and accuracy of a TCXO or OCXO

External EEPROM support for autonomous initialization

1.8V single power supply with internal regulation

Built-in temperature monitor/alarm and temperature compensation for enhanced zero latency performance

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