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Infineon Technologies CY25701FJXC
- Part No.:
- CY25701FJXC
- Manufacturer:
- Infineon Technologies
- Category:
- Programmable Timers and Oscillators
- Package:
- 4-SMD, J-Lead
- Datasheet:
-
CY25701FJXC.pdf
- Description:
- IC OSC XTAL PROG 4-JE
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
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Product details
Overview
CY25701FJXC from Cypress Semiconductor is a programmable high-frequency crystal oscillator with integrated PLL, supporting both spread-spectrum (SSXO) and no-spread (XO) modes. It delivers 10–166 MHz output clock frequencies, ±0.25% to ±2.0% center spread or –0.5% to –4.0% down spread, 31.5 kHz modulation frequency, and 85 ps typical cycle-to-cycle jitter at 133 MHz - used for EMI reduction in PC motherboard clock trees.
For engineers reviewing the CY25701FJXC datasheet, CY25701FJXC pinout, CY25701FJXC application, or CY25701FJXC equivalent, key selection criteria include programmable spread percentage, SSCLK output enable control, 3.3V operation, JE package compatibility, and factory/field-programmable configuration for EMC-compliant timing in consumer and networking systems.
Technical Context
The CY25701FJXC integrates a proprietary PLL to synthesize output frequencies from an embedded crystal, enabling precise 10–166 MHz clock generation without external components. Its modulation engine applies deterministic 31.5 kHz frequency deviation with user-selectable center or down spread profiles.
Configuration is stored in nonvolatile memory and programmed via CY3672 kit or third-party programmers (BP Microsystems, HiLo). The OE pin provides asynchronous output enable/disable with ≤350 ns response time, while output drive meets 12 mA source/sink capability into 15 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 10–166 MHz - covers PCIe, USB, SATA, and DDR reference clocks |
| Spread Spectrum Modulation | 31.5 kHz fixed frequency - ensures consistent EMI reduction across full output range |
| Center Spread Range | ±0.25% to ±2.0% - enables fine-tuned EMI suppression for FCC/CE compliance |
| Down Spread Range | –0.5% to –4.0% - targets harmonic-rich digital interfaces like video pixel clocks |
| Cycle-to-Cycle Jitter | 85 ps typical at 133 MHz - meets PCI Express Gen1/Gen2 clock jitter requirements |
| Supply Voltage | 3.3 V ±10% - compatible with standard I/O voltage domains in modern SoC platforms |
| Operating Temperature | –20°C to +70°C - supports commercial-grade desktop, peripheral, and gateway applications |
Pinout & Package
Package: 4-pin Plastic JE (10.2 × 5.6 mm), surface-mount, Pb-free, commercial temperature grade (–20°C to +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OE | Output Enable control input | Active-HIGH CMOS-level signal; disables SSCLK output to high-impedance state when low |
| 2 VSS | Ground reference | Power supply return path for internal PLL and output buffer; requires local 0.1 µF decoupling |
| 3 SSCLK | Modulated clock output | CMOS-compatible 3.3V output driving up to 15 pF; delivers programmed frequency and spread profile |
| 4 VDD | Power supply input | 3.3V ±10% supply; must ramp monotonically with TPU ≤ 500 ms for reliable startup |
Key Features
| Feature | Design Value |
|---|---|
| Field-programmable spread mode | Enables switching between SSXO and XO operation post-manufacture using CY3672 kit or distributor programming |
| Integrated PLL with crystal | Eliminates need for external PLL IC or crystal oscillator module - reduces BOM count and layout area |
| Asynchronous OE control | Supports dynamic clock gating during system sleep states without PLL relock delay |
| Low-jitter SSCLK output | 85 ps typical cycle-to-cycle jitter at 133 MHz ensures timing margin for high-speed serial links |
| Pb-free JE package | RoHS-compliant 4-pin plastic JE footprint matches legacy oscillator footprints for drop-in replacement |
Applications
| PC Motherboard Clock Tree | Network Interface Card (NIC) |
|---|---|
Use Scenario: Provides primary reference clock for CPU, chipset, and peripheral controllers on ATX/mATX motherboards. IC Role / Device Role / Timing Role: Programmable SSXO generating 100 MHz PCIe REFCLK and 133 MHz FSB clock with ±0.5% center spread. Use Value: Reduces radiated emissions at 100/200/300 MHz harmonics to pass CISPR 22 Class B without added shielding or ferrites. | Use Scenario: Supplies synchronized clock to Gigabit Ethernet PHY and MAC layers in enterprise NICs. IC Role / Device Role / Timing Role: XO-mode (±0.0%) 125 MHz clock for IEEE 802.3ab compliance; SSXO mode enabled during EMI debug. Use Value: Eliminates need for separate XO and SSXO parts - single BOM item supports both production and compliance test configurations. |
| Consumer Set-Top Box | Industrial Gateway Controller |
Use Scenario: Drives HDMI transmitter, video decoder, and audio codec in HD media players. IC Role / Device Role / Timing Role: Down-spread 74.25 MHz clock for HDMI pixel rate with –2.0% modulation to suppress 74/148/222 MHz peaks. Use Value: Achieves >10 dB peak EMI reduction at critical harmonics, avoiding costly re-spin of metal shielding cans. | Use Scenario: Synchronizes dual ARM Cortex-A9 cores and Gigabit Ethernet switch fabric in DIN-rail mounted gateways. IC Role / Device Role / Timing Role: Dual-output-capable timing source (via external fanout buffer) delivering 100 MHz and 125 MHz clocks. Use Value: Enables single-point clock distribution with matched skew and jitter performance across heterogeneous subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT XUH030100.000000I | Fixed 100 MHz XO; no spread spectrum or programmability; ±20 ppm stability; 2.5V/3.3V selectable | Only suitable where EMI reduction is handled externally or not required | Select only if fixed frequency and zero spread are acceptable and lower cost outweighs flexibility loss |
| Si510-AC100M0000 | Programmable I2C-based XO/VCXO; 10–945 MHz range; ±7 ppm stability; no built-in SSXO function | Requires external SSC generator or FPGA-based modulation for EMI control | Choose when multi-frequency agility or voltage-controlled tuning is needed over integrated spread spectrum |
Compared with IDT XUH030100.000000I and Si510-AC100M0000, CY25701FJXC uniquely integrates field-programmable SSXO functionality in a JE-packaged oscillator - eliminating external modulation circuitry while maintaining pin compatibility with legacy 4-pin clock modules.
Availability
CY25701FJXC is available at Aetrix Electronics and suitable for PC motherboard design, network interface card development, and consumer set-top box manufacturing requiring stable component supply and field-programmable EMI tuning.
Supply support for CY25701FJXC 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
Cypress Semiconductor (now part of Infineon Technologies) designs high-performance timing, memory, and programmable logic solutions for computing, communications, and industrial markets.
CY25701FJXC belongs to Cypress's SSXO product line, engineered specifically to replace discrete crystal + PLL + modulator assemblies with a single-programmable oscillator for EMI-sensitive digital systems.
FAQ
What programming tools are required to configure CY25701FJXC spread settings?
CY25701FJXC is programmed using the CY3672 Programming Kit with CY3613 socket adapter for JEC packages. Field programming is also supported by authorized Cypress distributors using BP Microsystems or HiLo Systems programmers. No in-system programming capability exists - configuration must be performed before soldering.
Does CY25701FJXC require an external crystal?
No. CY25701FJXC integrates a precision MEMS or quartz crystal within the JE package. The device uses this embedded resonator as the PLL reference - no external crystal, load capacitors, or trimming components are needed, simplifying layout and reducing bill-of-materials.
How does OE pin behavior affect system power sequencing?
The OE pin operates asynchronously: asserting OE low places SSCLK in high-impedance state within 350 ns, independent of VDD ramp status. This allows safe clock gating during power-down sequences without waiting for PLL lock or supply stabilization - critical for ACPI S3/S4 state transitions.
Can CY25701FJXC operate at 2.5V?
No. CY25701FJXC is specified only for 3.3V ±10% operation (3.0–3.6V). Attempting 2.5V operation results in undefined PLL behavior, failure to lock, or excessive jitter. For dual-voltage systems, use a dedicated 3.3V LDO rail or select a pin-compatible 2.5V oscillator such as the Si510 series.
CY25701FJXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 4-SMD, J-Lead
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Oscillator, Crystal
- Count:
- -
- Frequency:
- 10MHz ~ 166MHz
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 50 mA
- Operating Temperature:
- -20°C ~ 70°C
- Supplier Device Package:
- 4-JE
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
CY25701FJXC FAQ
1.How can I place an order for CY25701FJXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY25701FJXC 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 CY25701FJXC reliable?
The price and inventory of CY25701FJXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY25701FJXC is usually 5 days.
3.What payment methods are accepted for CY25701FJXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY25701FJXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY25701FJXC?
CY25701FJXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY25701FJXC 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 CY25701FJXC?
For technical support, including CY25701FJXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY25701FJXC requirements.
6.How does Aetrix verify that CY25701FJXC is sourced from the original manufacturer or authorized distributors?
All CY25701FJXC 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 CY25701FJXC meets industry standards.
7.What is the process for return or replacement of CY25701FJXC?
All CY25701FJXC units undergo pre-shipment inspection (PSI). If there is an issue with CY25701FJXC, 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 CY25701FJXC part is unused and in its original packaging.
Return procedure for CY25701FJXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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