AD9548BCPZ-REEL7

Overview

The AD9548BCPZ-REEL7 is a quad/octal input network clock generator and synchronizer manufactured by Analog Devices Inc. It generates output clocks synchronized to up to four differential or eight single-ended external references using a digital PLL for jitter reduction. The device supports Stratum 2 stability in holdover mode and features hitless reference switchover with phase build-out. It operates over an industrial temperature range of −40°C to +85°C. Key electrical parameters include a maximum output frequency of 725 MHz, supply voltages of 1.71V to 3.465V, and an 88-lead LFCSP package.

Feature Summary

• Supports Stratum 2 stability in holdover mode with auto/manual holdover and reference switchover capabilities.
• Features a digital PLL with programmable loop bandwidth from 0.001 Hz to 100 kHz and 30-bit integer/10-bit fractional feedback dividers.
• Provides four pairs of clock outputs configurable as differential LVDS/LVPECL or single-ended CMOS, reaching up to 725 MHz.
• Includes on-chip EEPROM for storing multiple power-up profiles and software-controlled power-down.

Applications

• Network synchronization
• Cleanup of reference clock jitter
• GPS 1 pulse per second synchronization
• SONET/SDH clocks up to OC-192, including FEC
• Stratum 2 holdover, jitter cleanup, and phase transient control

Procurement Notes

Verify the component matches the 88-LFCSP (12x12) package and REEL7 tape-and-reel packaging format. Confirm the operating temperature range covers -40°C to +85°C and that the supply voltage specifications align with the system design requirements for DVDD and AVDD rails.

Selection Notes

Select this component for applications requiring high-precision network synchronization and jitter cleaning. Ensure the input reference frequencies fall within the 1 Hz to 750 MHz range. Consider the power dissipation characteristics, which can reach up to 1400 mW when all blocks are running, for adequate thermal management in the PCB layout.

Part Context

This part belongs to the AD9548 series of network clock generators. The BCPZ suffix indicates the lead-free RoHS-compliant variant in the LFCSP package. The REEL7 suffix specifies the reel packaging quantity and type used for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs if considering alternative clock synchronizers from other manufacturers.