AD9554-1BCPZ-REEL7

Overview

The AD9554-1BCPZ-REEL7 is a quad digital phase-locked loop (DPLL) clock translator manufactured by Analog Devices Inc. It provides jitter cleanup and synchronization for systems including SONET/SDH and synchronous Ethernet. The device features four reference inputs and four differential clock outputs, supporting frequencies from 430 kHz to 941 MHz. It operates on a 1.8 V supply with typical current consumption of 513 mA. Key specifications include programmable loop bandwidths from 0.1 Hz to 4 kHz and support for ITU-T G.8262 and GR-1244 Stratum 3 standards.

Feature Summary

• Quad DPLL architecture with 4x4 crosspoint allowing any reference input to drive any PLL
• Supports adaptive clocking for dynamic adjustment of feedback dividers in OTN mapping/demapping
• Four differential outputs configurable as HCSL, LVDS-compatible, or LVPECL-compatible
• Integrated holdover circuitry maintains low jitter output even when all references fail

Applications

• Network synchronization including synchronous Ethernet and SDH to OTN mapping
• SONET/SDH clocks up to OC-192, including FEC
• Stratum 3 holdover, jitter cleanup, and phase transient control
• Cable infrastructure and data communications

Procurement Notes

Verify the package type matches the 56-lead LFCSP-WQ (8 mm × 8 mm) specification. Confirm the operating temperature range covers -40°C to +85°C. Ensure the supply voltage requirements align with the 1.8 V nominal operation parameters defined in the datasheet.

Selection Notes

Select this component for applications requiring multiple independent clock domains with high stability. The quad DPLL structure supports flexible reference routing. Verify that the required output frequency range falls within the 430 kHz to 941 MHz limit for simultaneous unique VCO operation.

Part Context

This part belongs to the AD9554 family of multiservice line card adaptive clock translators. It is designed to replace multiple discrete clock components, reducing system complexity. The device integrates digital control loops and analog PLLs to provide robust clock generation and distribution.

Replacement Considerations

For single or dual DPLL versions, refer to the AD9557 or AD9559 respectively. These alternatives offer similar functionality with fewer channels.