AD9550BCPZ-REEL7

Overview

The AD9550BCPZ-REEL7 is an integer-N clock translator manufactured by Analog Devices Inc. It converts preset standard input frequencies to standard output frequencies using a phase-locked loop (PLL). The device accepts a single-ended CMOS reference input ranging from 8 kHz to 200 MHz and generates two independent output clocks with maximum frequencies up to 810 MHz for LVPECL/LVDS modes or 200 MHz for CMOS mode. It operates on a single 3.3 V supply, consuming less than 450 mW under most conditions. The component is housed in a 32-LFCSP-WQ (5x5) package.

Feature Summary

• Supports frequency translation from 15 preset input frequencies to 52 preset output frequency pairs via pin-programmable control pins.
• Features an integrated voltage-controlled oscillator (VCO) operating between 3350 MHz and 4050 MHz.
• Outputs are independently programmable as LVPECL, LVDS, or single-ended CMOS logic levels.
• Exceeds Telcordia GR-253-CORE jitter generation, transfer, and tolerance specifications.

Applications

• Cost-effective replacement for high-frequency VCXO, OCXO, and SAW resonators
• Wireline applications including Ethernet, T1/E1, SONET/SDH, GPON, and xDSL
• Wireless infrastructure base stations
• Test and measurement equipment

Procurement Notes

Verify the REEL7 suffix indicates tape-and-reel packaging containing 1500 units per manufacturer specification. Confirm RoHS compliance status through official documentation prior to procurement. Ensure ESD precautions are observed during handling due to moisture sensitivity classification.

Selection Notes

Select this component when a low-cost, fixed-ratio frequency translation solution is required without digital programming interfaces. Verify that the specific input-to-output frequency pair matches one of the 52 preconfigured hardware settings defined by the A and Y control pins. Ensure the application supports the required loop filter external components for optimal jitter performance.

Part Context

This part belongs to the AD9550 series of clock translators designed for wireline communications. It serves as a specialized alternative to discrete crystal oscillators, offering flexible frequency conversion within a compact footprint while maintaining strict jitter requirements for synchronous data transmission systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate compatibility based on package dimensions, pinout configuration, and electrical specifications if considering alternative manufacturers.

FAQ

How is the frequency translation ratio configured?

The frequency translation ratio is configured via hardware connections to the A3-A0 and Y5-Y0 control pins, which select from 15 preset input frequencies and 52 preset output frequency combinations.

What is the maximum output frequency for CMOS mode?

The maximum output frequency for CMOS mode is 200 MHz. Higher frequencies require LVPECL or LVDS output configurations, which support up to 810 MHz.

Does the device require an external loop filter?

Yes, external components (R, C1, C2) must be connected between Pin 16 (FILTER) and Pin 17 (LDO) to set the PLL loop bandwidth and optimize jitter performance.