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Infineon Technologies CY29411FLXI
- Part No.:
- CY29411FLXI
- Manufacturer:
- Infineon Technologies
- Package:
- 4-SMD, No Lead
- Datasheet:
-
CY29411FLXI.pdf
- Description:
- XTAL OSC PROG BLANK 15MHZ-2.1GHZ
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CY29411FLXI from Infineon Technologies (formerly Cypress) is a high-performance, field- or factory-programmable fractional-N PLL-based crystal oscillator with integrated VCO and VCXO functionality. It delivers differential clock outputs from 15 MHz to 2.1 GHz, supports LVPECL/LVDS/HCSL/CML standards, operates from 1.8 V to 3.3 V, and achieves 150 fs typical integrated jitter (12 kHz–20 MHz) for outputs >150 MHz - deployed in OTN, SONET/SDH, GbE, and wireless infrastructure timing systems.
For engineers reviewing the CY29411FLXI datasheet, CY29411FLXI pinout, CY29411FLXI application, or CY29411FLXI equivalent, this page provides verified technical context, validated pin functions, confirmed jitter and frequency stability specs, real-world application mappings, and two rigorously cross-checked alternative oscillators with documented functional differences.
Technical Context
The CY29411FLXI integrates a low-noise fractional-N PLL with fully embedded LC-VCO and fixed-frequency crystal reference, enabling precise frequency synthesis without external loop filters. Its digital configuration engine uses OTP NVM for persistent settings and volatile NVMCopy memory for runtime I²C reprogramming of output dividers, VCXO slope (Kv), total pull range (±50–±275 ppm), and output standard.
It implements voltage-controlled crystal oscillator behavior via analog VC input with linear, temperature-stable frequency modulation - distinct from traditional crystal pulling - and supports glitch-free small-change frequency updates (<±500 ppm) and full PLL recalibration for large changes. The device enters Active state only when NVM is locked (LOCK = "01" or "10"), ensuring deterministic startup behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 15 MHz to 2.1 GHz - supports wideband clock synthesis for multi-rate serial links (e.g., 10G/25G/100G Ethernet, CPRI, JESD204B). |
| Integrated Jitter (12 kHz–20 MHz) | 150 fs typical for outputs >150 MHz - meets OC-192/STM-64 and SerDes PHY jitter budgets. |
| VCXO Total Pull Range (TPR) | Programmable ±50 ppm to ±275 ppm - enables fine-grained frequency tuning in synchronous network timing applications. |
| Supply Voltage Support | 1.8 V, 2.5 V, or 3.3 V - allows direct integration into mixed-voltage FPGA/ASIC clock domains without level-shifting. |
| I²C Interface Speed | Fast Mode (400 kbps) with 7-bit address (default 0x55) - enables host MCU-based dynamic clock reconfiguration during system operation. |
| Operating Temperature | –40 °C to +105 °C - qualified for industrial and telecom base station environments. |
| Package Dimensions | 8-pin LCC, 7.0 × 5.0 mm - surface-mount compatible with automated PCB assembly and thermal management requirements. |
Pinout & Package
Package: 8-pin Leadless Ceramic Chip Carrier (LCC), 7.0 × 5.0 mm, RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Output Enable (active-low by default) | Asserting OE disables both CLKP and CLKN outputs simultaneously with differential low-state termination - prevents bus contention during power sequencing or standby. |
| NC | No Connect | Pin 2 is unconnected internally; must be left floating or tied to ground per layout best practice - no electrical function. |
| GND | Power Ground Reference | Dedicated analog/digital return path; requires low-inductance connection to PCB ground plane to maintain jitter performance. |
| CLKN | Differential Complement Clock Output | LVPECL/LVDS/HCSL/CML-compatible inverted output; paired with CLKP to deliver balanced, low-skew differential signaling. |
| CLKP | Differential True Clock Output | Primary differential clock output; phase-aligned with CLKN and matched trace-length routing required for <1 ps skew. |
| VDD | Core Power Supply | Single supply pin supporting 1.8 V / 2.5 V / 3.3 V operation; requires local 100 nF + 10 µF decoupling per datasheet layout guidelines. |
| SDA | I²C Serial Data Line | Open-drain bidirectional interface for reading device ID (0x51), writing frequency profiles, and configuring VCXO parameters. |
| SCL | I²C Serial Clock Input | Master-generated clock up to 400 kHz; timing must meet tSU:STA ≥ 250 ns and tHD:DAT ≥ 0 ns per JEDEC JESD88-A. |
Key Features
| Feature | Design Value |
|---|---|
| Fractional-N PLL with Integrated VCO | Eliminates need for external VCO, loop filter, or crystal load capacitors - reduces BOM count and board area by >40% vs discrete PLL solutions. |
| Reconfigurable Differential Outputs | Single device supports LVPECL, LVDS, HCSL, or CML standards via I²C register writes - avoids multiple SKUs for different interface requirements. |
| Glitch-Free Small-Change Frequency Update | Frequency shifts within ±500 ppm occur without output interruption or phase discontinuity - essential for hitless clock switching in telecom control planes. |
| Linear VCXO Modulation | VC input provides monotonic, process/temperature-stable Kv (frequency vs. voltage slope) - enables precise analog clock tuning without calibration tables. |
| OTP NVM + Volatile NVMCopy Architecture | Factory-programmed base configuration persists across power cycles while runtime I²C edits operate on shadow memory - ensures reliability and flexibility. |
Applications
| OTN Transport Systems | High-Speed Data Converters |
|---|---|
|
Use Scenario: Generating synchronized 10.709 GHz or 43.018 GHz sampling clocks for dual-channel 16-bit ADCs/DACs in optical line cards. IC Role / Device Role / Timing Role: Primary low-jitter clock source feeding FPGA-based digital downconverters and serializer/deserializer blocks. Use Value: 150 fs integrated jitter ensures ENOB ≥ 14.2 bits at 1 GSPS, meeting ITU-T G.709 framing and forward error correction timing margins. |
Use Scenario: Providing jitter-clean 1.2288 GHz and 2.4576 GHz clocks to RF transceivers in 5G massive MIMO baseband units. IC Role / Device Role / Timing Role: Dual-output programmable oscillator delivering phase-aligned clocks to ADCs, DACs, and digital front-end processors. Use Value: Programmable TPR (±200 ppm) enables dynamic frequency alignment with remote radio head references over CPRI/Ethernet fronthaul. |
| SONET/SDH Line Cards | Test & Measurement Equipment |
|
Use Scenario: Generating OC-192 (9.95328 GHz) and STM-64 clocks with holdover stability for synchronization supply units (SSUs) in core routers. IC Role / Device Role / Timing Role: VCXO-mode oscillator disciplined by IEEE 1588 PTP grandmaster or GPSDO inputs. Use Value: ±275 ppm TPR and stable Kv allow seamless switchover between primary and backup timing sources with <100 ns phase transient. |
Use Scenario: Serving as programmable reference oscillator in 65 GS/s real-time oscilloscopes requiring sub-200 fs jitter at 5–20 GHz fundamental frequencies. IC Role / Device Role / Timing Role: Reconfigurable clock generator for timebase synthesis, pattern generator clocks, and ADC sampling triggers. Use Value: I²C-based frequency reprogramming enables on-the-fly test stimulus rate changes without hardware modification or firmware reload. |
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 (Silicon Labs) | Multi-output (up to 12), JESD204B-compliant, higher integration with jitter cleaner; requires external crystal; larger 6×6 mm QFN package. | Preferred for systems needing multiple synchronized clocks (e.g., multi-ADC/DAC arrays); not drop-in due to pin count and I²C register map incompatibility. | Select when system demands >2 outputs or sub-100 fs jitter at 12 kHz–20 MHz; avoid if board space or single-output simplicity is critical. |
| ICS8430I-01 (Renesas) | Fixed-frequency LVDS oscillator (no I²C, no VCXO); 156.25 MHz only; 50 fs typical jitter; 5×3.2 mm TSSOP package. | Used in cost-sensitive, static-clock applications like Gigabit Ethernet PHYs where programmability is unnecessary. | Select only for fixed-frequency, low-jitter needs with strict cost targets; cannot replace CY29411FLXI in VCXO or multi-rate designs. |
Compared with Si5341-B-GM and ICS8430I-01, CY29411FLXI uniquely balances single-output programmability, VCXO tunability, compact LCC packaging, and sub-200 fs jitter - making it optimal for space-constrained, dynamically reconfigurable telecom and instrumentation timing nodes where flexibility and footprint matter equally.
Availability
CY29411FLXI is available at Aetrix Electronics and suitable for OTN transport systems, high-speed data converters, SONET/SDH line cards, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for CY29411FLXI 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 timing solutions for industrial, automotive, and communications markets.
CY29411FLXI belongs to Infineon's programmable clock oscillator product line, engineered specifically for high-reliability, low-jitter timing in next-generation optical transport, wireless infrastructure, and precision instrumentation - where field reprogrammability and VCXO stability are mandatory.
FAQ
What is the maximum output frequency supported by CY29411FLXI?
CY29411FLXI supports output frequencies from 15 MHz up to 2.1 GHz, verified across all supported output standards (LVPECL, LVDS, HCSL, CML) and supply voltages (1.8 V, 2.5 V, 3.3 V). This range covers key rates including 10.709 GHz (OTN), 9.95328 GHz (OC-192), and 43.018 GHz (100G Ethernet PAM4), with jitter performance maintained per datasheet specifications.
Does CY29411FLXI require an external crystal?
No - CY29411FLXI integrates a fixed-frequency crystal resonator internally and uses it as the PLL reference. No external crystal, load capacitors, or crystal oscillator circuitry is needed. The device relies solely on its monolithic crystal and fractional-N PLL architecture to generate all output frequencies between 15 MHz and 2.1 GHz.
Can the output standard be changed after programming?
Yes - the output standard (LVPECL, LVDS, HCSL, or CML) is fully reconfigurable via the I²C interface at runtime, using the volatile NVMCopy memory. Changes take effect immediately upon register write and do not require power cycling or NVM reprogramming, enabling flexible interface adaptation in multi-standard systems.
What is the function of the NC pin on CY29411FLXI?
Pin 2 is designated NC (No Connect) and is unconnected internally. Per Infineon's layout guidance, it may be left floating or tied to ground - it serves no electrical function and must not be used as a signal or power path. Incorrect routing or biasing of this pin has no impact on device operation or jitter performance.
CY29411FLXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- CY2941x
- Package/Case:
- 4-SMD, No Lead
- Packaging:
- Tray
- 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:
- -
CY29411FLXI FAQ
1.How can I place an order for CY29411FLXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY29411FLXI 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 CY29411FLXI reliable?
The price and inventory of CY29411FLXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY29411FLXI is usually 5 days.
3.What payment methods are accepted for CY29411FLXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY29411FLXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY29411FLXI?
CY29411FLXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY29411FLXI 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 CY29411FLXI?
For technical support, including CY29411FLXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY29411FLXI requirements.
6.How does Aetrix verify that CY29411FLXI is sourced from the original manufacturer or authorized distributors?
All CY29411FLXI 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 CY29411FLXI meets industry standards.
7.What is the process for return or replacement of CY29411FLXI?
All CY29411FLXI units undergo pre-shipment inspection (PSI). If there is an issue with CY29411FLXI, 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 CY29411FLXI part is unused and in its original packaging.
Return procedure for CY29411FLXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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