Infineon Technologies CY29422FLXIT

Overview

CY29422FLXIT from Infineon Technologies (formerly Cypress) is a high-performance programmable fractional-N PLL-based oscillator with integrated crystal, supporting differential LVPECL/LVDS/HCSL/CML outputs from 15 MHz to 2.1 GHz. It features 150 fs typical integrated jitter (12 kHz–20 MHz), ±50 to ±275 ppm VCXO total pull range, and operates across 1.8 V/2.5 V/3.3 V supply rails at –40 °C to +105 °C ambient - deployed in OTN line cards, wireless infrastructure baseband timing, and high-speed ADC/DAC clocking.

For engineers reviewing the CY29422FLXIT datasheet, CY29422FLXIT pinout, CY29422FLXIT application, or CY29422FLXIT equivalent, key selection criteria include its field-programmable VCXO capability, I²C-configurable output standards, low-jitter performance at >150 MHz, and 8-pin LCC (5.0 × 3.2 mm) package compatibility with space-constrained telecom timing modules.

Technical Context

The CY29422FLXIT implements a fully integrated LC-VCO-based fractional-N PLL architecture with on-die crystal reference, eliminating external crystal load capacitors. Its digital configuration path includes OTP NVM for factory programming and volatile NVMCopy accessible via I²C for runtime tuning.

VCXO functionality is implemented through an analog voltage-controlled modulation pathway feeding the VCO core, enabling linear frequency pulling with programmable Kv slope, TPR, and modulation bandwidth - independent of crystal aging or temperature drift. Output drivers support reconfigurable differential standards without hardware change.

Key Specifications

Pinout & Package

Package: 8-pin LCC (5.0 × 3.2 mm), RoHS-compliant, lead-free, surface-mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable oscillator applications.

Compared with Si5341-B-GM and ICS8430I-01T, CY29422FLXIT uniquely balances single-output compactness, full I²C programmability, and VCXO flexibility - making it optimal for upgradeable telecom modules and calibrated instrumentation where footprint and adaptability are co-constrained.

Availability

CY29422FLXIT is available at Aetrix Electronics and suitable for OTN line card timing, wireless baseband synchronization, and high-speed data converter clocking requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY29422FLXIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, sensors, and secure connectivity solutions for automotive, industrial, and communications markets.

CY29422FLXIT belongs to Infineon's programmable clock oscillator product line, designed specifically to replace fixed-frequency crystals and discrete PLLs in high-speed communication infrastructure where field-adjustable timing precision is mandatory.

FAQ

What is the minimum I²C setup time required before the first command after power-up?

The CY29422FLXIT requires a minimum of 5 ms after VDD reaches its specified minimum voltage (e.g., 1.71 V for 1.8 V operation) before the first I²C access. This delay ensures internal power-on reset completion and NVMCopy initialization from OTP eFuse. Attempting earlier communication may result in NACK or undefined register behavior.

Can the VC pin be left unconnected if VCXO functionality is not used?

No - the VC pin must not be left floating. Per the datasheet, it must be externally tied to either VDD or GND to prevent noise injection into the VCO control path, which could degrade phase noise or cause frequency instability. This requirement applies regardless of VCXO enable/disable state in configuration registers.

Does CY29422FLXIT support spread-spectrum clocking (SSC)?

No - the CY29422FLXIT does not implement spread-spectrum modulation. Its architecture focuses on ultra-low jitter and precise VCXO control; SSC is neither listed in functional descriptions nor supported in the memory map. For EMI reduction, external modulation or alternative oscillators with SSC capability must be considered.

How is output frequency accuracy maintained over temperature and voltage variation?

Frequency accuracy relies on the stability of the internal fixed-frequency crystal reference and the digitally compensated fractional-N PLL loop. The VCXO Kv slope and TPR are characterized across –40 °C to +105 °C and 1.8–3.3 V, with calibration data stored in OTP NVM. No external compensation components are required - all temperature/voltage compensation is handled internally via factory-trimmed parameters.