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 CY25819SXCT

Name: CY25819SXCT
Brand: Infineon Technologies
SKU: CY25819SXCT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CY25819SXCT

Manufacturer:: Infineon Technologies

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: CY25819SXCT.pdf

Description:: IC CLK/FREQ SYNTH 8SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,480

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

Product details

Overview

CY25819SXCT from Cypress Semiconductor is a spread spectrum clock generator (SSCG) IC designed to reduce electromagnetic interference in high-speed digital systems. It accepts 16–32 MHz crystal, resonator, or clock inputs; provides separate modulated (SSCLK) and unmodulated (REFCLK) outputs; delivers down-spread modulation with selectable –0.5% to –3.0% spread; and operates at 3.3 V with typical power dissipation of 36 mW at 16 MHz and 63 mW at 32 MHz - used in LCD panels, notebook PCs, and networking equipment.

For engineers reviewing the CY25819SXCT datasheet, CY25819SXCT pinout, CY25819SXCT application, or CY25819SXCT equivalent, key selection criteria include input frequency range (16–32 MHz), spread percentage control via 3-level S0 pin, modulation rate (f_IN/512), cycle-to-cycle jitter (250 ps SSCLK, 275 ps REFCLK), and commercial-grade 8-pin SOIC packaging.

Technical Context

The CY25819SXCT implements a proprietary PLL-based spread spectrum architecture with non-linear optimized frequency modulation to flatten spectral energy distribution across fundamental and harmonic frequencies. Its down-spread profile reduces peak EMI by 8–16 dB without degrading timing integrity.

Modulation rate is fixed at f_IN/512 (e.g., 62.5 kHz at 32 MHz input); spread percentage is selected via 3-level S0 pin (H/M/L), enabling discrete –0.5% to –3.0% down-spread values depending on input frequency band; and both SSCLK and REFCLK outputs maintain 45–55% duty cycle with 2.0–4.0 ns rise/fall times.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Frequency Range	16–32 MHz - supports crystal/resonator/clock sources for mainstream digital display and computing platforms.
Spread Modulation	Down-spread only, –0.5% to –3.0% - user-selectable via 3-level S0 pin to meet specific EMI compliance targets.
Modulation Rate	f_IN/512 - e.g., 62.5 kHz at 32 MHz input; ensures optimal spectral spreading without affecting system timing margins.
Cycle-to-Cycle Jitter	250 ps (SSCLK), 275 ps (REFCLK) - low jitter preserves setup/hold timing in synchronous interfaces like LVDS and DDR.
Power Dissipation	36 mW typ @ 16 MHz, 63 mW typ @ 32 MHz - enables thermal management in space-constrained consumer electronics.
Supply Voltage	2.97–3.63 V - compatible with standard 3.3 V logic rails and tolerant of ±10% regulation variation.
Operating Temperature	0°C to +70°C - commercial-grade rating suitable for printers, MFPs, and embedded digital systems.

Pinout & Package

Package: 8-pin SOIC (150-mil), surface-mount, RoHS-compliant, commercial temperature grade (0°C to +70°C).

Pin/Terminal	Circuit Role	Design Meaning
1 XIN/CLKIN	Clock input terminal	Accepts external clock, crystal, or ceramic resonator; internal oscillator circuitry enables standalone timing generation.
2 Vss	Ground reference	Dedicated analog/digital ground pin; must be connected to low-impedance PCB ground plane for jitter and EMI performance.
3 S0	Spread% control input	3-level digital input (H/M/L) selecting down-spread percentage; no external resistors required due to on-chip 10k/10k divider.
4 SSCLK	Modulated output clock	Primary spread-spectrum output; frequency equals input; down-modulated per S0 setting; drives high-speed digital interfaces.
5 REFCLK	Unmodulated reference clock	Exact input frequency replica; used for phase-sensitive circuits (e.g., PLL feedback, ADC sampling clocks) requiring stable timing.
6 PD#	Active-low power-down control	Pulls high by default; driven low to halt internal PLL and reduce supply current to ≤250 µA - enables dynamic EMI management.
7 Vdd	Positive supply rail	3.3 V nominal supply; decoupling capacitor (0.1 µF) required near pin for noise suppression and jitter stability.
8 XOUT	Clock output for crystal/resonator	Drives crystal or resonator when XIN is used as input; left unconnected when external clock applied to XIN.

Key Features

Feature	Design Value
Proprietary non-linear SSC profile	Optimized frequency vs. time curve flattens spectral energy distribution - achieves up to 16 dB peak EMI reduction without increasing bandwidth.
3-level S0 spread control	Single-pin interface selects three discrete down-spread percentages - eliminates need for I²C/SPI configuration and simplifies BOM.
Dual-output architecture	Simultaneous SSCLK (modulated) and REFCLK (unmodulated) outputs - supports mixed-signal systems requiring both EMI-reduced and jitter-critical clocks.
Low-power power-down mode	PD# pin reduces supply current to ≤250 µA - enables rapid EMI suppression during idle periods in portable and battery-aware designs.
Integrated crystal drive circuitry	XIN/XOUT pins support direct crystal/resonator connection - removes need for external oscillator IC or buffer, reducing board area and cost.

Applications

Printers and MFPs

LCD Panels and Notebook PCs

Use Scenario: High-resolution print engine timing and parallel data transfer between ASIC and print head controller.

IC Role / Device Role / Timing Role: Generates spread-spectrum pixel clock and reference clock for image processing pipeline while meeting FCC Class B radiated emissions limits.

Use Value: Reduces peak EMI by ≥12 dB at 32 MHz fundamental, eliminating need for costly metal shielding or ferrite beads on display interface traces.

Use Scenario: Driving LVDS or eDP timing in thin-bezel notebook displays with tight EMI budgets.

IC Role / Device Role / Timing Role: Provides synchronized SSCLK for source driver ICs and clean REFCLK for timing controller PLLs.

Use Value: Enables 32 MHz pixel clock operation with <250 ps cycle-to-cycle jitter on SSCLK and <275 ps on REFCLK - maintains display image integrity while passing CISPR-22 testing.

Digital Copiers

Networking and LAN/WAN Equipment

Use Scenario: Scanner-to-printer data path synchronization in multifunction copier systems with high-speed parallel bus interfaces.

IC Role / Device Role / Timing Role: Supplies modulated system clock to image sensor interface and unmodulated clock to memory controller for frame buffering.

Use Value: Achieves –3.0% down-spread at 24 MHz input (S0 = H), reducing third-harmonic emissions at 72 MHz by >10 dB - avoids redesign of RF-filtered backplane connectors.

Use Scenario: Clocking Ethernet PHYs and switch fabric controllers in compact 1U rack-mounted switches.

IC Role / Device Role / Timing Role: Delivers spread-spectrum clock to Gigabit PHY and stable reference to packet buffer memory controller.

Use Value: Supports 16–32 MHz input range matching common PHY reference clocks; dual outputs eliminate need for separate clock buffers - reduces layer count and signal integrity risk.

Equivalent & Alternatives

The following parts are listed as comparable options for similar spread spectrum clock generator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT 8T49N241	Programmable spread (±0.25% to ±4.0%), I²C-configurable, 4-output, 3.3 V; higher integration but larger TQFN package.	Requires firmware initialization; suited for programmable platforms where spread % must adapt dynamically.	Select when system-level software control of spread parameters is required and board space permits 4×4 mm TQFN.
ON Semi NB3N502	Fixed –0.5% down-spread only; single SSCLK output; no REFCLK; 8-pin SOIC; lower cost but no spread selectability.	Limited to fixed EMI reduction; cannot optimize spread for varying noise peaks or regulatory test bands.	Select for cost-sensitive, static-design applications where –0.5% spread suffices and dual-clock architecture is unnecessary.

Compared with IDT 8T49N241 and ON Semi NB3N502, the CY25819SXCT uniquely balances pin-strapped flexibility (3-level spread control), dual-output capability, and SOIC compatibility - making it optimal for fixed-function consumer electronics where design simplicity, EMI margin, and layout efficiency are prioritized over programmability.

Availability

CY25819SXCT is available at Aetrix Electronics and suitable for printers and MFPs, LCD panels and notebook PCs, and digital copiers requiring stable component supply with commercial-temperature reliability and RoHS-compliant packaging.

Supply support for CY25819SXCT 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 U.S.-based semiconductor company specializing in programmable system-on-chip solutions, timing devices, and USB controllers.

The CY258xx series belongs to Cypress's Spread Spectrum Clock Generator product line, engineered specifically to reduce radiated EMI in cost-sensitive, high-volume consumer and computing systems without compromising timing accuracy or requiring complex configuration.

FAQ

What is the maximum input frequency supported by CY25819SXCT?

The CY25819SXCT supports an input frequency range of 16–32 MHz. This is strictly defined in the datasheet (Rev. *E, page 4) and verified across electrical characteristics tables. Operation outside this range - including below 16 MHz or above 32 MHz - is not characterized or guaranteed, and may result in unstable PLL lock or incorrect spread modulation behavior.

How does the 3-level S0 pin select spread percentage?

The S0 pin detects HIGH (Vdd), MIDDLE (floating), and LOW (GND) logic levels using an internal 10k/10k resistor divider. Each level maps to a discrete down-spread value (e.g., S0=H → –3.0% at 16–20 MHz input). No external components are needed, and the mapping is fixed per input frequency band as specified in Table 2 of the datasheet.

Can CY25819SXCT drive a crystal directly?

Yes. When a crystal or ceramic resonator is used, connect it between XIN (Pin 1) and XOUT (Pin 8); the device includes integrated oscillator circuitry. The XOUT pin must not be left floating in this configuration. If an external clock is applied to XIN, XOUT must remain unconnected per Pin Description (page 3).

Is there a version of CY25819SXCT rated for industrial temperature range?

The CY25819SXCT is specified for 0°C to +70°C (commercial grade). Cypress documentation (page 4) states industrial range (–40°C to +85°C) and TSSOP packaging are available upon request - but no orderable industrial-grade variant (e.g., CY25819SXIT) is listed in official ordering information or distributor catalogs as of Rev. *E.

CY25819SXCT 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:: Clock/Frequency Synthesizer, Fanout Distribution, Frequency Modulator, Spread Spectrum Clock Generator

PLL:: Yes

Input:: Clock, Crystal, Resonator

Output:: Clock

Number of Circuits:: 1

Ratio - Input:Output:: 1:2

Differential - Input:Output:: No/No

Frequency - Max:: 32MHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 2.97V ~ 3.63V

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

CY25819SXCT FAQ

1.How can I place an order for CY25819SXCT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY25819SXCT 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 CY25819SXCT reliable?

The price and inventory of CY25819SXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY25819SXCT is usually 5 days.

3.What payment methods are accepted for CY25819SXCT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY25819SXCT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY25819SXCT?

CY25819SXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY25819SXCT 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 CY25819SXCT?

For technical support, including CY25819SXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY25819SXCT requirements.

6.How does Aetrix verify that CY25819SXCT is sourced from the original manufacturer or authorized distributors?

All CY25819SXCT 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 CY25819SXCT meets industry standards.

7.What is the process for return or replacement of CY25819SXCT?

All CY25819SXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY25819SXCT, 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 CY25819SXCT part is unused and in its original packaging.

Return procedure for CY25819SXCT:

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…