Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Infineon Technologies CY29412FLXIT

Name: CY29412FLXIT
Brand: Infineon Technologies
SKU: CY29412FLXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CY29412FLXIT

Manufacturer:: Infineon Technologies

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 8-CLCC

Datasheet:: CY29412FLXIT.pdf

Description:: XTAL OSC PROG BLANK 15MHZ-2.1GHZ

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,893

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CY29412FLXIT from Infineon Technologies (formerly Cypress) is a high-performance programmable fractional-N PLL-based oscillator with integrated crystal, supporting differential clock outputs (LVPECL/LVDS/HCSL/CML), 15 MHz to 2.1 GHz output frequency range, ±50–±275 ppm VCXO total pull range, and 150 fs typical integrated jitter (12 kHz–20 MHz). It operates from 1.8 V, 2.5 V, or 3.3 V supply across –40 °C to +105 °C and targets OTN, SONET/SDH, and wireless infrastructure timing systems.

For engineers reviewing the CY29412FLXIT datasheet, CY29412FLXIT pinout, CY29412FLXIT application, or CY29412FLXIT equivalent, key selection considerations include I²C-programmable VCXO slope (Kv), output standard reconfiguration, small/large frequency change behavior, and OTP NVM vs. volatile memory partitioning for field tuning.

Technical Context

The device implements a fully integrated LC-VCO-based fractional-N PLL architecture with on-die crystal oscillator input, eliminating external crystal load capacitors. Its digital configuration path includes I²C-accessible volatile memory ("NVMCopy") and one-time programmable nonvolatile memory (eFuse) storing common settings (supply voltage, OE polarity, I²C address, output standard) and frequency profiles (DIVN_INT/Frac, DIVO).

VCXO functionality is implemented via analog voltage-controlled modulation of the VCO core, delivering linear, temperature-stable frequency pulling independent of crystal aging or load variation. The ADC + digital filtering pathway enables precise Kv calibration and bandwidth control, with TPR programmable from ±50 ppm to ±275 ppm and modulation bandwidth configurable per application.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency Range	15 MHz to 2.1 GHz - supports full-rate SerDes clocking for OTN, 10G/25G Ethernet, and RF sampling clocks.
Integrated Jitter (12 kHz–20 MHz)	150 fs typical - meets OC-192/STM-64 and JESD204B Class B phase noise requirements.
VCXO Total Pull Range (TPR)	±50 ppm to ±275 ppm - enables precise system-level frequency alignment in synchronous optical networks.
Supply Voltage Options	1.8 V / 2.5 V / 3.3 V - allows direct interface with mixed-voltage FPGA/ASIC I/O banks without level shifters.
Output Standards	LVPECL, LVDS, HCSL, CML - selectable via I²C; eliminates need for external signal conditioning or translation ICs.
Operating Temperature	–40 °C to +105 °C - qualified for industrial-grade base station and test equipment deployment.
I²C Interface Speed	Fast Mode (400 kbps) - enables real-time frequency retuning during system calibration or failover events.

Pinout & Package

8-pin LCC package (5.0 × 3.2 mm), RoHS-compliant, lead-free, surface-mount. Exposed pad not present; thermal dissipation handled via PCB copper area under body.

Pin/Terminal	Circuit Role	Design Meaning
VC	VCXO control voltage input	Analog input for frequency pulling; must be tied to VDD or GND if unused to prevent floating node instability.
OE	Output enable (active-low default)	Asynchronous enable/disable of CLKP/CLKN; polarity programmable via NVM to match system logic convention.
GND	Power ground reference	Dedicated low-impedance return path for analog PLL core and output drivers; separate from digital I²C ground in layout best practice.
CLKN	Differential complement clock output	LVPECL/LVDS/HCSL/CML-compatible true-complement pair; requires matched trace length and 100 Ω termination for optimal jitter performance.
CLKP	Differential true clock output	Paired with CLKN; output standard and amplitude set by NVM configuration, not external resistors.
VDD	Core power supply	Single-supply rail powering PLL, VCO, dividers, and output drivers; no sequencing required but monotonic ramp needed at power-up.
SDA	I²C bidirectional data line	Open-drain, 3.3 V tolerant; supports partial writes only to designated memory map addresses (50h–57h, 10h–15h).
SCL	I²C clock input	Drives internal state machine; minimum 5 ms delay required after VDD stabilization before first access.

Key Features

Feature	Design Value
Fractional-N PLL with integrated LC-VCO	Eliminates external loop filter components and enables sub-Hz frequency resolution without crystal multiplication artifacts.
Field-programmable OTP NVM + volatile memory copy	Allows factory pre-configuration (NVM) and runtime tuning (NVMCopy) - supports both production-line calibration and in-system frequency updates.
Small-change frequency update (±500 ppm)	Glitch-free transition between frequencies using I²C; avoids clock interruption in live packet-switched or telecom timing applications.
Programmable VCXO Kv and modulation bandwidth	Enables custom loop response for phase-locked applications like jitter cleaners or adaptive clock recovery circuits.
Multi-standard differential output driver	Single device replaces multiple fixed-output oscillators; reduces BOM count and PCB footprint in multi-protocol systems.

Applications

OTN Line Card Timing

Wireless Baseband Unit

Use Scenario: Generating synchronized 9.953 Gbps and 10.709 Gbps line rates for OTU2/OTU2e framing in DWDM transport systems.

IC Role / Device Role / Timing Role: Primary reference oscillator providing low-jitter clock to SERDES PHY and FEC ASIC, with VCXO used for network element synchronization via IEEE 1588 PTP slave loop.

Use Value: 150 fs integrated jitter ensures <1e-12 BER under stressed optical conditions; programmable TPR accommodates stratum-3E holdover requirements.

Use Scenario: Clocking dual 2×2 MIMO RF transceivers and FPGA-based digital pre-distortion (DPD) engines in 4G LTE macro base stations.

IC Role / Device Role / Timing Role: Dual-output timing source delivering 122.88 MHz (for DAC/ADC sampling) and 30.72 MHz (for CPRI interface), both derived from same PLL core.

Use Value: Single-device multi-frequency synthesis reduces inter-clock skew; LVDS outputs directly drive FPGA banks without termination resistors.

High-Speed Data Acquisition

Test & Measurement Instrumentation

Use Scenario: Providing sampling clocks to 16-bit, 250 MSPS ADCs in modular digitizers for radar and spectrum analysis.

IC Role / Device Role / Timing Role: Low-phase-noise clock generator with VCXO input for external jitter attenuation loop control.

Use Value: Sub-200 fs jitter preserves ENOB >13.5 bits; programmable Kv allows matching to external loop filter design.

Use Scenario: Serving as programmable reference in arbitrary waveform generators (AWG) requiring tunable output from 10 MHz to 2 GHz with <1 ppm accuracy.

IC Role / Device Role / Timing Role: Reconfigurable clock source enabling single-hardware platform to emulate multiple legacy and emerging serial protocols (PCIe, SATA, USB).

Use Value: I²C-based frequency change supports GUI-driven sweep modes; small-change mode enables seamless frequency stepping without waveform glitches.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5341-B-GM (Skyworks)	Multi-output (up to 12), JESD204B-compliant, higher integration with jitter cleaning; larger 7×7 mm QFN package.	Targets complex multi-clock domain systems (e.g., radar beamforming); less suitable for space-constrained single-output use cases.	Select when needing >1 output or sub-100 fs jitter; avoid if board area or cost sensitivity favors compact 5×3.2 mm LCC.
ICS8430I-01 (Renesas)	Fixed-frequency LVPECL oscillator (no I²C, no VCXO); 150 fs jitter, 100–1250 MHz range; 8-pin SOIC package.	Used in static clock trees where frequency never changes post-manufacture; lacks field reprogrammability.	Select for cost-sensitive, volume production with immutable clock requirements; avoid when VCXO tuning or field updates are needed.

Compared with Si5341-B-GM and ICS8430I-01, CY29412FLXIT uniquely balances single-output compactness, full I²C configurability, and proven VCXO linearity - making it optimal for upgradeable telecom line cards and instrumentation platforms requiring field-tunable precision timing.

Availability

CY29412FLXIT is available at Aetrix Electronics and suitable for OTN transport systems, wireless infrastructure baseband units, and high-speed data acquisition systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.

Supply support for CY29412FLXIT 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 management, sensing, connectivity, and security solutions for automotive, industrial, and communications markets.

CY29412FLXIT belongs to Infineon's programmable clock portfolio - designed specifically to replace fixed-frequency oscillators in high-speed communication systems where flexible, low-jitter, field-upgradable timing is critical.

FAQ

What is the maximum output frequency supported by CY29412FLXIT?

CY29412FLXIT supports output frequencies from 15 MHz up to 2.1 GHz. This range covers OC-192/STM-64 line rates, 10G/25G Ethernet PHY clocks, and sampling clocks for high-speed ADCs/DACs. Operation above 1.5 GHz requires careful PCB layout with controlled impedance and minimal stub length to maintain signal integrity.

Does CY29412FLXIT require an external crystal?

No. CY29412FLXIT integrates a fixed-frequency crystal oscillator circuit and uses an on-die crystal (not user-replaceable). It does not require external crystal load capacitors or tuning components - simplifying layout and improving reliability over discrete crystal + PLL solutions.

Can the output standard be changed after programming?

Yes. Output standards (LVPECL, LVDS, HCSL, CML) are stored in volatile memory ("NVMCopy") and can be reconfigured dynamically via I²C without resetting the device. Changes take effect immediately upon register write, enabling runtime protocol adaptation in multi-standard test equipment.

What is the purpose of the VC pin, and how should it be handled if unused?

The VC pin provides analog voltage input for VCXO frequency pulling. If unused, it must be connected to either VDD or GND - not left floating - to prevent noise coupling into the VCO control path and potential frequency instability or increased jitter.

CY29412FLXIT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CY2941x

Package/Case:: 8-CLCC

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: VCXO

PLL:: Yes

Input:: -

Output:: CML, HCSL, LVDS, LVPECL

Number of Circuits:: 1

Ratio - Input:Output:: 1:1

Differential - Input:Output:: No/No

Frequency - Max:: 2.1GHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 1.71V ~ 3.63V

Operating Temperature:: -40°C ~ 105°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: -

CY29412FLXIT FAQ

1.How can I place an order for CY29412FLXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY29412FLXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY29412FLXIT reliable?

The price and inventory of CY29412FLXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY29412FLXIT is usually 5 days.

3.What payment methods are accepted for CY29412FLXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY29412FLXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY29412FLXIT?

CY29412FLXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY29412FLXIT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY29412FLXIT?

For technical support, including CY29412FLXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY29412FLXIT requirements.

6.How does Aetrix verify that CY29412FLXIT is sourced from the original manufacturer or authorized distributors?

All CY29412FLXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY29412FLXIT meets industry standards.

7.What is the process for return or replacement of CY29412FLXIT?

All CY29412FLXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY29412FLXIT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY29412FLXIT part is unused and in its original packaging.

Return procedure for CY29412FLXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…