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Infineon Technologies CY25482SXIT
- Part No.:
- CY25482SXIT
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY25482SXIT.pdf
- Description:
- IC SS CLOCK GENERATOR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,379
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Product details
Overview
CY25482SXIT from Cypress Semiconductor is a two-PLL programmable clock generator with spread spectrum capability, designed for EMI reduction in high-speed digital systems. It accepts 2.5 V/3.0 V/3.3 V external reference clocks (8–166 MHz), delivers three glitch-free outputs (3–166 MHz), supports center/down spread spectrum modulation (±0.125% to –5.0%), and operates in commercial temperature range (0°C to +70°C) with 2.25–3.60 V supply.
For engineers reviewing the CY25482SXIT datasheet, CY25482SXIT pinout, CY25482SXIT application, or CY25482SXIT equivalent, key selection criteria include its dual-PLL frequency synthesis, programmable drive strength (1.0–6.8 ns rise/fall), multifunction pins (FS0/FS1/SSON), and factory-programmable nonvolatile configuration for custom clock trees in PC and networking platforms.
Technical Context
The CY25482SXIT integrates two independent fractional-N PLLs enabling simultaneous generation of unrelated output frequencies from a single external reference clock-no crystal required. Its crossbar switch allows arbitrary assignment of XIN/EXCLKIN, PLL1, or PLL2 as source for each of three outputs.
Spread spectrum is implemented per-PLL with selectable lexmark or linear modulation profiles, and controlled via CLK2/SSON pin. Frequency switching between up to four preprogrammed settings is glitch-free when using output dividers, ensuring uninterrupted system timing during dynamic reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Clock Range | 8–166 MHz external LVCMOS reference; no crystal support (XIN/XOUT pins disabled) |
| Output Frequency Range | 3–166 MHz per output; synthesized via dual fractional-N PLLs |
| Spread Spectrum | Center-spread ±0.125% to ±2.50% or down-spread –0.25% to –5.0%; lexmark/linear profiles |
| Supply Voltage | 2.25–3.60 V; supports 2.5 V, 3.0 V, and 3.3 V operation |
| Output Drive Strength | Four settings: low (6.8 ns), mid-low (3.4 ns), mid-high (2.0 ns), high (1.0 ns) typical rise/fall |
| Operating Temperature | 0°C to +70°C (commercial grade); specified for stable timing in desktop and peripheral systems |
| Power Consumption | 14 mA typical active current (no load); 3 µA standby current in PD# = Low mode |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), surface-mount, 150 mil width, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EXCLKIN | Input | 2.5 V/3.0 V/3.3 V LVCMOS reference clock input (8–166 MHz); no crystal connection |
| 2 VDD | Power | Primary supply rail; configures internal logic voltage and output drive levels |
| 3 CLK1 | Output | Programmable clock output with optional spread spectrum; configurable drive strength |
| 4 REFOUT/FS0 | Output/Input | Reference clock output (no SS) or frequency select control input (FS0) |
| 5 PD#/OE/FS1 | Input | Three-mode control: power-down (active-low), output enable, or frequency select (FS1) |
| 6 CLK2/SSON | Output/Input | Programmable clock output with SS or spread spectrum ON/OFF control signal |
| 7 GND | Power | Digital ground reference for all I/O and internal circuitry |
| 8 DNU | Output | Do Not Use; internally unconnected; must be left floating or tied to GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual fractional-N PLLs | Enables independent synthesis of two unrelated output frequencies from one reference clock |
| Glitch-free frequency switching | Zero-cycle interruption during transitions between up to four preprogrammed output frequencies |
| Programmable spread spectrum | Reduces EMI peak emissions by modulating output clocks with user-selectable center/down profile |
| Multifunction I/O pins | REFOUT/FS0, PD#/OE/FS1, and CLK2/SSON reduce board routing complexity and increase design flexibility |
| Nonvolatile configuration | Factory-programmed .jed file stores PLL ratios, SSC parameters, drive strength, and pin functions permanently |
Applications
| Desktop Motherboard Clocking | Network Interface Card (NIC) |
|---|---|
Use Scenario: Generating CPU, memory, and PCIe reference clocks from a single 100 MHz system reference. IC Role / Device Role / Timing Role: Primary clock generator providing three synchronized, spread-spectrum-enabled outputs for noise-sensitive high-speed buses. Use Value: Eliminates need for multiple discrete oscillators; reduces EMI compliance risk on dense PCBs with tight layout constraints. | Use Scenario: Supplying 125 MHz Ethernet PHY clock and 25 MHz management interface clock in gigabit NIC designs. IC Role / Device Role / Timing Role: Dual-PLL synthesizer delivering isolated, jitter-controlled clocks with independent SSC enablement per output. Use Value: Meets IEEE 802.3 jitter limits while lowering radiated emissions without external filtering components. |
| USB 3.0 Host Controller | Industrial Embedded Gateway |
Use Scenario: Providing 100 MHz USB 3.0 reference and 24 MHz USB 2.0 auxiliary clock from one 25 MHz system oscillator. IC Role / Device Role / Timing Role: Frequency translator and spread-spectrum modulator for USB timing domains requiring <1 ps RMS jitter. Use Value: Achieves USB-IF certification with single-chip solution; avoids clock domain crossing issues via dedicated PLL paths. | Use Scenario: Delivering 50 MHz ARM core clock, 33.33 MHz Ethernet MAC clock, and 16.67 MHz CAN controller clock in fanless gateway units. IC Role / Device Role / Timing Role: Programmable clock hub supporting mixed-voltage SoC peripherals with configurable drive strength for long trace routing. Use Value: Enables single-BOM support across commercial and industrial temperature variants via nonvolatile register programming. |
Equivalent & Alternatives
Cypress CY25482SXIT has two verified drop-in alternatives with documented functional overlap and known trade-offs in voltage support, package, or feature set.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-D-GM | Four-output, I²C-programmable; requires external EEPROM; supports 1.8 V–3.3 V; higher integration but larger QFN32 package | Used where multi-output flexibility and field reprogramming are required; not suitable for space-constrained SOIC layouts | Select if system needs post-deployment clock reconfiguration or >3 outputs; avoid if SOIC footprint and one-time programming are mandatory |
| ICS8430I-01T | Two-output, fixed-frequency LVDS/LVPECL; no spread spectrum; 3.3 V only; lower jitter (<0.3 ps RMS) but no frequency agility | Deployed in legacy telecom line cards where deterministic low-jitter clocks outweigh EMI reduction needs | Select for ultra-low-jitter applications with static clock trees; avoid when spread spectrum or frequency select functionality is required |
Compared with Si5338A-D-GM and ICS8430I-01T, CY25482SXIT uniquely balances SOIC-8 footprint, factory-programmable spread spectrum, and dual-PLL agility-making it optimal for cost-sensitive, EMI-regulated PC and peripheral designs where field reprogramming is unnecessary.
Availability
CY25482SXIT is available at Aetrix Electronics and suitable for desktop motherboard clocking, network interface card (NIC) timing, and USB 3.0 host controller reference generation requiring stable component supply and guaranteed long-term manufacturability.
Supply support for CY25482SXIT 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 CY254xx family targets cost-optimized, EMI-conscious clock generation in PC, networking, and portable systems-designed for factory-programmed simplicity over field configurability, with emphasis on jitter performance and spread-spectrum flexibility.
FAQ
Is CY25482SXIT compatible with a crystal oscillator input?
No. Unlike CY25402/CY25422, CY25482SXIT lacks crystal oscillator circuitry: Pin 1 is EXCLKIN (external clock only), and Pin 8 is DNU-not XOUT. It requires a buffered 2.5 V/3.0 V/3.3 V LVCMOS reference clock (8–166 MHz). Crystal-based designs must use CY25402 or CY25422 instead.
What does "DNU" on Pin 8 mean, and how should it be handled?
"DNU" stands for "Do Not Use." Pin 8 is internally unconnected and must not be soldered to any net. Best practice is to leave it floating or tie it to GND with a 0 Ω resistor for mechanical stability-never connect to VDD or signal lines, as this may cause latch-up or undefined behavior per Cypress design guidelines.
Can spread spectrum be enabled independently on CLK1 and CLK2 outputs?
Yes. Each PLL (PLL1 → CLK1, PLL2 → CLK2) has independent spread spectrum control. CLK2/SSON pin selects global SSC enable/disable, but individual PLL registers determine whether each output applies center-spread, down-spread, or no modulation-verified in Cypress's CY25482 configuration software and .jed file generation flow.
Does CY25482SXIT support I²C or SPI configuration after soldering?
No. CY25482SXIT is factory-programmed with one-time programmable (OTP) memory. Configuration is locked at manufacturing via a .jed file; no serial interface exists for in-system reprogramming. All settings-including PLL ratios, SSC profiles, drive strength, and pin functions-are immutable after programming.
CY25482SXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Spread Spectrum Clock Generator
- PLL:
- Yes with Bypass
- Input:
- LVCMOS, Crystal
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:3
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 166MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.25V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
CY25482SXIT FAQ
1.How can I place an order for CY25482SXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY25482SXIT 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 CY25482SXIT reliable?
The price and inventory of CY25482SXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY25482SXIT is usually 5 days.
3.What payment methods are accepted for CY25482SXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY25482SXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY25482SXIT?
CY25482SXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY25482SXIT 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 CY25482SXIT?
For technical support, including CY25482SXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY25482SXIT requirements.
6.How does Aetrix verify that CY25482SXIT is sourced from the original manufacturer or authorized distributors?
All CY25482SXIT 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 CY25482SXIT meets industry standards.
7.What is the process for return or replacement of CY25482SXIT?
All CY25482SXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY25482SXIT, 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 CY25482SXIT part is unused and in its original packaging.
Return procedure for CY25482SXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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