AD9542BCPZ

Overview

The AD9542BCPZ is a quad-input, five-output dual digital phase-locked loop (DPLL) synchronizer and adaptive clock translator manufactured by Analog Devices Inc. It operates within a −40°C to +85°C temperature range in a 48-lead LFCSP package. The device accepts input frequencies from 2 kHz to 750 MHz and generates synchronized outputs up to 500 MHz. It utilizes two DPLLs with 24-bit fractional dividers and programmable digital loop filter bandwidths ranging from 10⁻⁴ Hz to 1850 Hz. Power consumption typically ranges from 445 mW to 813 mW depending on configuration, supplied by a single 1.8 V source.

Feature Summary

• Dual DPLL architecture supporting frequency translation and jitter cleaning for noisy references
• Five pairs of differential output pins configurable as LVDS, HCSL, or CML, or four single-ended outputs
• Programmable priority-based reference switching with automatic/manual holdover modes
• Supports embedded clock signals and autonomous initialization via external EEPROM

Applications

• SyncE jitter cleanup and synchronization
• Optical transport networks (OTN), SDH, and macro/small cell base stations
• JESD204B support for ADC and DAC clocking
• Stratum 2, Stratum 3e, and Stratum 3 holdover systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and revision status. Confirm that the required serial interface protocol (SPI or I²C) matches the system design constraints before procurement.

Selection Notes

Select this component when dual independent DPLLs are required for high-performance jitter cleaning and frequency synthesis. Ensure the application supports the 1.8 V supply voltage and accommodates the 48-lead LFCSP footprint. Verify that the input reference frequencies fall within the 2 kHz to 750 MHz operational range.

Part Context

This part belongs to the AD9542 series of clock synchronizers. It is distinct from the AD9544 and AD9545 models, which offer different feature sets such as IEEE 1588 support or additional output configurations. The BCPZ suffix indicates the lead-free LFCSP package variant.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate the AD9544 or AD9545 only if additional features like IEEE 1588 timestamping are required, noting differences in pinout and functionality.