AD9545BCPZ

Overview

The AD9545BCPZ is a quad-input, ten-output dual digital phase-locked loop (DPLL) synchronizer and jitter cleaner manufactured by Analog Devices Inc. It supports physical layer clock synchronization from 1 Hz to 750 MHz with frequency translation capabilities. The device features two independent DPLLs equipped with 24-bit fractional dividers and auxiliary numerically controlled oscillators for IEEE 1588 Version 2 servo feedback. It operates on a single 1.8 V supply within a 48-lead LFCSP package rated for temperatures between −40°C and +85°C.

Feature Summary

• Dual DPLL architecture supporting 1 Hz to 750 MHz input frequencies with programmable digital loop filter bandwidths ranging from 10^-4 Hz to 1850 Hz.
• Ten output channels configurable as five differential pairs (LVDS/HCSL/CML) or four single-ended outputs operating up to 500 MHz.
• Integrated auxiliary NCOs providing resolution below 1.37 × 10^-12 Hz for precise Phase Time Protocol (PTP) applications.
• Supports automatic and manual holdover modes with priority-based reference switching for zero-delay, hitless operation.

Applications

• Global positioning system (GPS), PTP (IEEE 1588), and synchronous Ethernet (SyncE) jitter cleanup
• Optical transport networks (OTN) and synchronous digital hierarchy (SDH)
• Macro and small cell base station clocking including Stratum 2, 3e, and 3 holdover
• JESD204B support for analog-to-digital converter (ADC) and digital-to-analog converter (DAC) clocking

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging type and reel specifications. Confirm that the component meets RoHS compliance standards required for the target assembly process. Ensure the selected variant matches the exact voltage and temperature range requirements of the design.

Selection Notes

Select this component when designing systems requiring dual independent DPLLs for high-performance synchronization. Verify that the application requires support for ITU-T G.8262 and Telcordia GR-253 standards. Ensure the design accommodates the 48-lead LFCSP footprint and provides adequate thermal management for the specified power dissipation levels.

Part Context

This part belongs to the AD9545 family of clock synchronizers designed for service provider packet networks. It is distinct from other devices in the series by its specific combination of quad inputs and ten outputs. The component is intended for infrastructure equipment requiring robust timing distribution and noise reduction.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official manufacturer documentation for cross-reference information before considering alternative components.

FAQ

What is the maximum input frequency supported by the AD9545?

The AD9545 supports physical layer clock synchronization for input frequencies up to 750 MHz.

How many output channels does the AD9545 provide?

The device provides ten clock outputs, which can be configured as five differential pairs or four single-ended outputs.

Does the AD9545 support IEEE 1588 Version 2?

Yes, the device includes two independent programmable auxiliary NCOs suitable for IEEE 1588 Version 2 servo feedback in PTP applications.