AD9554-1BCPZ

Overview

The AD9554-1BCPZ is a quad digital phase-locked loop (DPLL) clock translator manufactured by Analog Devices Inc. It features four reference inputs and four differential clock outputs, packaged in a 56-lead LFCSP. The device supports input frequencies up to 1000 MHz and generates output clocks ranging from 430 kHz to 941 MHz. Operating voltages include VDD at 1.8 V (max 1.89 V) or 1.5 V (max 1.53 V), with VDD_SP supporting up to 2.625 V. Typical supply current is 513 mA at 1.8 V. Output drivers are configurable as HCSL, LVDS-compatible, or LVPECL-compatible.

Feature Summary

• Quad DPLL architecture with a 4x4 crosspoint allowing any reference input to drive any PLL.
• Supports GR-1244 Stratum 3 stability in holdover mode and smooth reference switchover.
• Adaptive clocking for dynamic adjustment of feedback dividers in OTN mapping/demapping applications.
• Programmable loop bandwidths from 0.1 Hz to 4 kHz for SyncE compatibility.

Applications

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

Procurement Notes

Verify the package type matches the 56-LFCSP-WQ (8x8 mm) specification. Confirm that the operating voltage requirements align with the 1.5 V or 1.8 V VDD rails and the 2.625 V maximum for VDD_SP. Ensure thermal management accounts for power dissipation up to 1.2 W under full load conditions.

Selection Notes

Select this component when a quad-channel solution is required for multiservice line cards. The AD9554-1 provides one output per PLL; for designs requiring two outputs per PLL, consider the AD9554 variant. Verify that the input frequency range of 2 kHz to 1000 MHz covers the system's reference sources.

Part Context

The AD9554-1 is part of the AD9554 family of clock translators. It differs from the standard AD9554 by providing a single differential output per PLL channel rather than two. This specific configuration suits applications where fewer output channels are needed but quad-reference flexibility remains critical.

Replacement Considerations

The AD9554 is a related part within the same family but offers two outputs per PLL instead of one. For single or dual DPLL versions, the AD9557 or AD9559 may be appropriate alternatives depending on channel count requirements.