CY29422FLXI

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY29422FLXI is a high-performance programmable oscillator from the CY2941x/CY2942x series, manufactured by Infineon Technologies (formerly Cypress Semiconductor). It features a fractional-N PLL with a fully integrated VCO and supports output frequencies from 15 MHz to 2.1 GHz. The device operates on supply voltages of 1.8 V, 2.5 V, or 3.3 V within an ambient temperature range of –40 °C to +105 °C. It provides differential clock outputs in LVPECL, LVDS, HCSL, or CML standards, with typical integrated jitter performance of 150 fs (12 kHz to 20 MHz offset) for frequencies above 150 MHz. The component includes VCXO functionality with a tunable total pull range from ±50 ppm to ±275 ppm and utilizes an I²C interface for configuration.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Supports flexible output frequency tuning from 15 MHz to 2.1 GHz using a fractional-N PLL architecture.
• Offers reconfigurable differential clock outputs compatible with LVPECL, LVDS, HCSL, and CML standards via I²C.
• Integrates VCXO functionality allowing voltage-controlled frequency modulation with adjustable pull ranges.
• Features low-noise PLL design optimized for integrated crystal applications with excellent jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Optical Transport Network (OTN) systems
• SONET/SDH networking infrastructure
• High-speed data converters

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the ordering suffix matches the required package type and configuration mode. The 'FLXI' designation indicates a field-programmable variant housed in an 8-pin LCC package suitable for industrial temperature ranges. Confirm specific factory programming requirements if a fixed-frequency solution is preferred over field configurability.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a wide frequency range up to 2.1 GHz is required alongside low jitter performance. Ensure the system design accommodates the specific termination requirements for the chosen output standard (LVPECL, LVDS, HCSL, or CML). Verify that the available supply voltage aligns with the device's 1.8 V, 2.5 V, or 3.3 V operating ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the CY2941x/CY2942x family of high-performance programmable oscillators. The CY2942x sub-series specifically utilizes a compact 5.0 × 3.2 mm 8-pin LCC package, distinguishing it from the larger 7.0 × 5.0 mm package used in the CY2941x series. Both series share identical electrical characteristics and functional capabilities.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the same package and footprint include other CY29422 variants such as CY29422LXIxxxT for factory-configured needs. Cross-series substitution with CY29412 devices requires accounting for the larger 7.0 × 5.0 mm package dimensions.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the default I²C address for the CY29422FLXI?

The default I²C device address is 55h. This address is programmable via the I²C interface.

How does the device handle frequency changes after NVM locking?

After the Non-Volatile Memory (NVM) is locked, the output frequency can still be modified using Small Change commands (within ±500 ppm) or Large Change commands (greater than ±500 ppm) through the I²C interface without requiring reprogramming of the NVM.

Is specific power supply sequencing required for startup?

No specific sequencing is required between input signals and the VDD supply. The device only requires a monotonic VDD ramp within specified limits to start up correctly.