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Infineon Technologies CY25100ZXIFT
- Part No.:
- CY25100ZXIFT
- Manufacturer:
- Infineon Technologies
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CY25100ZXIFT.pdf
- Description:
- IC FANOUT BUFFER 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
CY25100ZXIFT from Cypress Semiconductor is a field-programmable spread spectrum clock generator (SSCG) IC designed to reduce electromagnetic interference in high-speed digital systems. It synthesizes and modulates clock outputs using an integrated PLL, supports 3–200 MHz SSCLK output, ±0.25%–±2.5% center or –0.5%––5.0% down spread, and operates at 3.3 V in 8-pin TSSOP.
For engineers reviewing the CY25100ZXIFT datasheet, CY25100ZXIFT pinout, CY25100ZXIFT application, or CY25100ZXIFT equivalent, this page delivers verified technical context, real-world EMI reduction use cases, validated pin functions, and precise configuration parameters for industrial and commercial timing designs.
Technical Context
The CY25100ZXIFT implements a proprietary PLL architecture with programmable modulation control, enabling frequency synthesis and real-time spread spectrum modulation at a fixed 31.5 kHz modulation frequency across its full 3–200 MHz output range. Its dual-clock architecture provides both a non-modulated REFCLK (identical to input frequency) and a modulated SSCLK output.
Configuration is stored in on-chip Flash memory, supporting up to 100 field reprogramming cycles. Input options include 8–30 MHz fundamental crystals (with programmable 12–60 pF internal load capacitance) or 8–166 MHz external reference clocks. The device supports user-selectable PD# (power-down) or OE (output enable) functionality on Pin 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 3 MHz to 200 MHz SSCLK; enables compatibility with PCIe, USB, DDR, and video interfaces. |
| Spread Spectrum Modulation | 31.5 kHz fixed modulation frequency; ±0.25%–±2.5% center or –0.5%––5.0% down spread; directly reduces peak EMI by spreading energy across bandwidth. |
| Input Frequency Support | 8–30 MHz crystal or 8–166 MHz clock input; eliminates need for external buffer or level-shifting in most host clock domains. |
| Crystal Load Capacitance | Programmable 12–60 pF in 0.5 pF steps on XIN/XOUT; replaces external load caps and simplifies crystal matching. |
| Cycle-to-Cycle Jitter | 90–260 ps (measured); meets timing margin requirements for synchronous interfaces up to 166 MHz. |
| Supply Voltage | 3.13–3.45 V; compatible with standard 3.3 V rail without regulation overhead. |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade embedded and automotive infotainment applications. |
Pinout & Package
Package: 8-pin TSSOP (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Power supply input | 3.3 V main supply; requires local 0.1 µF bypass capacitor. |
| 2 XOUT | Crystal oscillator output | Drives crystal in fundamental mode; floats when external clock used on XIN. |
| 3 XIN/CLKIN | Crystal or reference clock input | Accepts 8–30 MHz crystal or 8–166 MHz clock; internal biasing enabled. |
| 4 PD#/OE | Configurable control input | Factory-programmed as active-low power-down (PD#) or active-high output enable (OE). |
| 5 VSS | Ground reference | Dedicated analog/digital ground return; must be low-impedance connection. |
| 6 REFCLK | Non-spread reference output | Buffered copy of input frequency; programmable enable/disable; phase-aligned to input. |
| 7 SSCLK | Spread spectrum clock output | Main modulated output; duty cycle 45–55%; slew rate optimized for 3–200 MHz operation. |
| 8 SSON# | Spread spectrum enable | Active-low control; asserts modulation when pulled low; high-Z when unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Field-programmable Flash memory | Up to 100 reprogramming cycles; enables late-stage design iteration and BOM flexibility without hardware change. |
| Integrated crystal load capacitors | 12–60 pF programmable in 0.5 pF steps; eliminates external capacitors and PCB layout sensitivity. |
| Low cycle-to-cycle jitter | As low as 90 ps (166 MHz, REFCLK off); preserves setup/hold margins in high-speed synchronous logic. |
| Dual-output architecture | Independent REFCLK (non-modulated) and SSCLK (modulated) outputs; supports mixed-signal timing domains. |
| Configurable power control | Single pin (Pin 4) supports either PD# (PLL/crystal shutdown) or OE (output disable); reduces system-level control lines. |
Applications
| PCIe Gen2/3 Clocking | Industrial HMI Display Timing |
|---|---|
Use Scenario: Clock distribution for PCIe root complex and endpoint devices requiring EMI compliance in compact enclosures. IC Role / Device Role / Timing Role: Primary spread spectrum clock generator providing synchronized 100 MHz SSCLK and clean 100 MHz REFCLK to SerDes PHYs. Use Value: Reduces 100 MHz harmonic peaks by >10 dB, eliminating need for ferrite beads or shielding cans in Class B emissions testing. |
Use Scenario: Timing source for LCD controller and touch processor in factory-floor HMIs exposed to variable ambient temperature. IC Role / Device Role / Timing Role: Industrial-grade SSCG delivering stable 27 MHz SSCLK to display interface and 27 MHz REFCLK to MCU timer peripherals. Use Value: Maintains <200 ps cycle-to-cycle jitter across –40°C to +85°C while meeting CISPR 22 radiated emission limits. |
| USB 3.0 Hub Reference | Automotive Infotainment SoC Clock |
Use Scenario: EMI-sensitive USB 3.0 hub design operating near RF modules in consumer docking stations. IC Role / Device Role / Timing Role: Generates 125 MHz SSCLK for USB PHY and 125 MHz REFCLK for hub controller, both derived from single 25 MHz crystal. Use Value: Achieves 12 dB peak EMI reduction at 125 MHz and harmonics without altering PCB stack-up or adding filtering components. |
Use Scenario: Clock source for multimedia SoC in automotive head units where EMC test margins are critical. IC Role / Device Role / Timing Role: Provides 166 MHz SSCLK to video encoder and 166 MHz REFCLK to audio DSP, both locked to same 16.6 MHz crystal. Use Value: Enables pass-fail compliance with ISO 11452-2 (absorber-lined chamber) at 166 MHz fundamental with no layout redesign. |
Equivalent & Alternatives
Cypress CY25100ZXIFT has two verified drop-in alternatives with documented functional trade-offs:
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 8T49N241 | Higher integration: includes dual PLLs, I²C programming, and 4 outputs; 2.5 V/3.3 V support; no internal crystal load caps. | Requires external crystal load capacitors and I²C host firmware; better suited for multi-clock domain systems. | Select when needing >2 outputs or dynamic spread adjustment; avoid if minimizing BOM count and firmware dependency is priority. |
| ON Semi NB3N502 | Fixed 0.5% down-spread only; no field programming; 8-pin SOIC only; higher typical jitter (150 ps @ 100 MHz). | No configuration flexibility; limited to pre-defined spread settings; not suitable for iterative EMI tuning. | Select for cost-sensitive, high-volume production where spread is fixed and field reprogramming is unnecessary. |
Compared with IDT 8T49N241 and ON Semi NB3N502, CY25100ZXIFT uniquely balances field programmability, integrated crystal tuning, and industrial temperature support - making it optimal for EMI-limited designs requiring post-silicon optimization without added complexity.
Availability
CY25100ZXIFT is available at Aetrix Electronics and suitable for PCIe clocking, industrial HMI timing, USB 3.0 reference generation, and automotive infotainment SoC clocking requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for CY25100ZXIFT 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) is a fabless semiconductor company specializing in programmable system-on-chip (PSoC), memory, and timing solutions for industrial, automotive, and consumer electronics.
The CY25100 belongs to Cypress's Spread Spectrum Clock Generator product line, engineered specifically to reduce radiated emissions in high-speed digital systems without compromising timing integrity or requiring board-level redesign.
FAQ
What is the maximum crystal frequency supported by CY25100ZXIFT?
The CY25100ZXIFT supports fundamental-mode AT-cut crystals from 8 MHz to 30 MHz. Operation outside this range is not guaranteed, and exceeding 30 MHz may cause oscillator startup failure or instability due to parasitic mode excitation. Crystals must meet R1 ≤ 25 Ω and drive level ≤ 2 mW per manufacturer spec.
Can CY25100ZXIFT generate both center-spread and down-spread simultaneously?
No. The CY25100ZXIFT supports only one spread mode per configuration: either center-spread (±0.25% to ±2.5%) or down-spread (–0.5% to –5.0%). The mode is selected during programming and cannot be changed dynamically. SSON# only enables or disables modulation-not the type of spread.
Is external programming hardware required to configure CY25100ZXIFT?
Yes. Field-programmable CY25100ZXIFT requires the Cypress CY3672 programmer with CY3690 (TSSOP) socket adapter. Programming must occur before soldering; in-circuit programming is not supported. Factory-programmed units ship with configuration fused and ready for immediate use.
How does the programmable crystal load capacitance affect oscillator stability?
The internal 12–60 pF load capacitance array matches crystal CL specification (CL = (CXIN + CXOUT)/2 + CP). Incorrect setting causes frequency error or startup delay. For example, a 16 pF crystal with 2 pF PCB parasitics requires CXIN = CXOUT = 30 pF. Mismatch by >2 pF risks >100 ppm frequency deviation or intermittent oscillation.
CY25100ZXIFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Fanout Buffer (Distribution), Spread Spectrum Clock Generator
- PLL:
- Yes
- Input:
- CMOS, Crystal
- Output:
- CMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:2
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 200MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.13V ~ 3.45V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TSSOP
CY25100ZXIFT FAQ
1.How can I place an order for CY25100ZXIFT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY25100ZXIFT 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 CY25100ZXIFT reliable?
The price and inventory of CY25100ZXIFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY25100ZXIFT is usually 5 days.
3.What payment methods are accepted for CY25100ZXIFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY25100ZXIFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY25100ZXIFT?
CY25100ZXIFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY25100ZXIFT 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 CY25100ZXIFT?
For technical support, including CY25100ZXIFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY25100ZXIFT requirements.
6.How does Aetrix verify that CY25100ZXIFT is sourced from the original manufacturer or authorized distributors?
All CY25100ZXIFT 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 CY25100ZXIFT meets industry standards.
7.What is the process for return or replacement of CY25100ZXIFT?
All CY25100ZXIFT units undergo pre-shipment inspection (PSI). If there is an issue with CY25100ZXIFT, 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 CY25100ZXIFT part is unused and in its original packaging.
Return procedure for CY25100ZXIFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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