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Infineon Technologies CY2544QC016T
- Part No.:
- CY2544QC016T
- Manufacturer:
- Infineon Technologies
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY2544QC016T.pdf
- Description:
- IC CLOCK GENERATOR 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,390
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Product details
Overview
CY2544QC016T from Cypress Semiconductor is a quad-PLL programmable clock generator with spread spectrum capability, designed for precise multi-frequency synthesis in timing-critical systems. It delivers nine programmable LVCMOS clock outputs (3–166 MHz), supports 1.8 V input reference and 2.5/3.0/3.3 V output bank supplies, and integrates Fractional-N PLLs for zero-PPM frequency error - deployed in PC motherboard clock trees and embedded networking controllers.
For engineers reviewing the CY2544QC016T datasheet, CY2544QC016T pinout, CY2544QC016T application, or CY2544QC016T equivalent, key selection criteria include its four independent PLLs, per-bank voltage-selectable outputs (1.8 V/2.5 V/3.0 V/3.3 V), glitch-free frequency switching via FS pins, and Lexmark/Linear spread spectrum modulation for EMI reduction.
Technical Context
The CY2544QC016T implements four fully integrated, independently configurable PLLs - PLL1–PLL4 - with PLL3 and PLL4 supporting center/down spread spectrum modulation. Input reference options include an 8–48 MHz crystal (XIN/EXCLKIN) or 8–166 MHz external clock (CLKIN), with 1.8 V LVCMOS logic compatibility for reference inputs.
Outputs are grouped into three voltage-isolated banks (Bank1: CLK1–CLK3; Bank2: CLK4–CLK6; Bank3: CLK7–CLK9), each powered by dedicated VDD_CLK_Bx supplies (1.8 V/2.5 V/3.0 V/3.3 V). Frequency selection uses three multifunction FS pins (FS0–FS2) to choose among eight preconfigured PLL states, enabling dynamic, glitch-free clock switching without system interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PLL Count | Four independent, programmable PLLs - enables simultaneous synthesis of unrelated frequencies from one reference source. |
| Output Count & Type | Nine LVCMOS clock outputs - supports mixed-voltage system timing with per-bank supply control. |
| Frequency Range | 3–166 MHz output range - covers PCIe, USB, SATA, and DDR clocking requirements without external dividers. |
| Spread Spectrum | Center spread ±0.125% to ±2.50%, down spread –0.25% to –5.0% - reduces EMI peak amplitude in FCC/CE-compliant designs. |
| Reference Inputs | Crystal: 8–48 MHz; External clock: 8–166 MHz at 1.8 V - ensures flexibility across legacy and high-speed timing architectures. |
| Fractional-N Synthesis | Zero-PPM frequency error achievable - eliminates long-term timing drift in precision data acquisition and telecom sync applications. |
| Operating Voltage | VDD = 2.5 V / 3.0 V / 3.3 V; VDD_CLK_Bx = 1.8 V / 2.5 V / 3.0 V / 3.3 V - enables coexistence with both low-power and high-performance logic domains. |
Pinout & Package
24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pin mapping validated per Cypress Document 001-12563 Rev. *M (CY2544-specific pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 12, 18, 19, 24 | GND | Power ground return paths for analog/digital domains and output banks - requires low-inductance PCB layout for jitter control. |
| 2, 6, 8, 11, 13, 15, 17, 20 | CLK1–CLK9 | Programmable LVCMOS clock outputs - CLK1/2/3 tied to VDD_CLK_B1; CLK4/5/6 to VDD_CLK_B2; CLK7/8/9 to VDD_CLK_B3. |
| 3, 14, 16, 22 | VDD_CLK_B1/B2/B3, VDD | Independent power rails - allows mixed-voltage operation and noise isolation between clock banks and core logic. |
| 4 | PD#/OE | Configurable active-low pin - selects between full-chip power-down (minimizing quiescent current) or per-output enable control. |
| 8, 9, 10, 15 | CLK3/FS0, OE/FS1, CLK4/FS2, CLK7/SSON | Multifunction pins - support frequency select (FS0–FS2), output enable, or spread spectrum ON/OFF control without external logic. |
| 21, 23, 24 | CLKIN, XOUT, XIN/EXCLKIN | Reference input interface - XIN/EXCLKIN accepts 8–48 MHz crystal or 1.8 V clock; CLKIN accepts 8–166 MHz 1.8 V reference. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent PLLs | Enables concurrent generation of up to four unrelated frequencies (e.g., 100 MHz PCIe, 125 MHz Ethernet, 200 MHz DDR, 25 MHz USB) from one crystal. |
| Per-bank output voltage control | Three isolated VDD_CLK_Bx supplies allow CLK1–CLK3 to drive 1.8 V FPGA I/O while CLK7–CLK9 supply 3.3 V microcontroller peripherals. |
| Glitch-free frequency switching | Hardware-managed divider reconfiguration during FS pin transitions prevents clock domain misalignment in real-time systems. |
| One-time programmable NVM | Stores custom PLL coefficients, spread spectrum profiles, drive strength, and crystal load capacitance - eliminates boot-time configuration overhead. |
| Lexmark/Linear SSC modulation | Field-selectable spread profiles meet varying EMI compliance targets - Lexmark for narrowband suppression, Linear for broadband attenuation. |
Applications
| PC Motherboard Clock Distribution | Network Switch Timing Subsystem |
|---|---|
|
Use Scenario: Generating synchronized clocks for CPU, PCIe, SATA, and USB controllers on ATX motherboards with shared 25 MHz crystal. IC Role / Device Role / Timing Role: Primary clock generator providing nine phase-aligned, voltage-matched outputs with spread spectrum applied to high-frequency clocks to pass CISPR 22 Class B. Use Value: Replaces discrete clock buffers and multiple oscillators - reduces BOM count by 4+ components and lowers system-level EMI by >10 dB at 100–300 MHz. |
Use Scenario: Delivering deterministic clocking to multi-port Gigabit Ethernet PHYs, packet processor, and management MCU in Layer 2 switches. IC Role / Device Role / Timing Role: Central timing hub distributing 125 MHz (GMII), 25 MHz (management bus), and 100 MHz (PCIe control) with independent jitter filtering per bank. Use Value: Enables single-crystal synchronization across heterogeneous silicon - eliminates inter-chip skew and simplifies board-level timing closure. |
| Industrial PLC Backplane Controller | Medical Imaging Data Acquisition |
|
Use Scenario: Providing isolated, low-jitter clocks to FPGA-based motion control logic, ADC interfaces, and CAN FD transceivers in harsh EMC environments. IC Role / Device Role / Timing Role: Programmable clock source with spread spectrum enabled only on high-frequency outputs (e.g., 100 MHz FPGA fabric clock), leaving critical 10 MHz sampling clocks unmodulated. Use Value: Meets IEC 61000-4-3 radiated immunity requirements while preserving timing integrity for real-time servo loops. |
Use Scenario: Synchronizing high-speed ADCs (125 MSPS), FPGA processing pipelines, and DDR3 memory interfaces in portable ultrasound systems. IC Role / Device Role / Timing Role: Zero-PPM Fractional-N synthesis ensures sub-picosecond jitter accumulation over multi-second image capture windows. Use Value: Eliminates timing-induced image artifacts (e.g., ghosting, banding) caused by clock drift in time-of-flight signal processing. |
Equivalent & Alternatives
CY2544QC016T alternatives provide comparable quad-PLL architecture with trade-offs in voltage support, spread spectrum options, and programmability.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT5V41001NLGI | Quad PLL with 1.8 V/2.5 V/3.3 V support; no built-in spread spectrum - requires external modulation circuitry. | Lacks integrated EMI reduction; suitable where system-level filtering suffices and NVM programming is unnecessary. | Select when spread spectrum is handled elsewhere and field reprogramming is not required. |
| Si5341-A02A-GM | 12-output, multi-loop clock generator with integrated jitter cleaners; supports JESD204B; requires external EEPROM for configuration. | Higher channel count and ultra-low jitter (<100 fs), but larger footprint and higher cost - over-specified for basic multi-clock synthesis. | Choose for JESD204B-compliant data converters or sub-50 fs jitter requirements; avoid for cost-sensitive consumer timing. |
Compared with IDT5V41001NLGI and Si5341-A02A-GM, CY2544QC016T uniquely combines on-chip spread spectrum, one-time programmable NVM, and per-bank voltage control in a compact 24-pin QFN - making it optimal for cost-constrained, EMI-sensitive embedded systems requiring fixed, production-ready timing configurations.
Availability
CY2544QC016T is available at Aetrix Electronics and suitable for PC motherboard design, industrial PLC backplanes, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for CY2544QC016T 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 high-precision timing solutions for industrial, automotive, and computing markets.
CY2544 belongs to Cypress's programmable clock generator product line, engineered to replace multiple fixed-frequency oscillators and clock buffers in complex digital systems - targeting EMI reduction, BOM simplification, and flexible frequency provisioning.
FAQ
What is the maximum output frequency supported by CY2544QC016T?
The CY2544QC016T supports a maximum output frequency of 166 MHz across all nine clock outputs. This is confirmed in the AC Electrical Specifications section of the official datasheet (Document 001-12563 Rev. *M), where tOH/tOL timing parameters are characterized up to 166 MHz under 3.3 V VDD and 3.3 V VDD_CLK_Bx conditions.
Does CY2544QC016T require external configuration hardware?
No - CY2544QC016T features one-time programmable (OTP) nonvolatile memory. Once programmed (e.g., via Cypress's CY3672 programmer or authorized service), it operates autonomously without external EEPROM, I²C interface, or boot-time configuration. Factory-programmed units ship ready for immediate use.
Can spread spectrum be disabled per output, or is it global?
Spread spectrum is applied per-PLL, not per-output. Only PLL3 and PLL4 support spread spectrum modulation; outputs sourced from PLL1 or PLL2 (e.g., CLK5) remain unmodulated. The SSON function on CLK7 pin enables/disables spread spectrum globally for both PLL3 and PLL4 simultaneously.
Is the 24-pin QFN package RoHS-compliant and lead-free?
Yes - CY2544QC016T is manufactured in a RoHS-compliant, lead-free 24-pin QFN package (package code QC016), as specified in the Ordering Information section of Document 001-12563 Rev. *M. The "Q" prefix denotes lead-free, halogen-free, and green-compliant packaging per JEDEC J-STD-020 standards.
CY2544QC016T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 24-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Generator
- PLL:
- Yes with Bypass
- Input:
- LVCMOS, Crystal
- Output:
- Clock
- Number of Circuits:
- 4
- Ratio - Input:Output:
- 1:9
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 166MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.25V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-QFN (4x4)
CY2544QC016T FAQ
1.How can I place an order for CY2544QC016T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY2544QC016T 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 CY2544QC016T reliable?
The price and inventory of CY2544QC016T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY2544QC016T is usually 5 days.
3.What payment methods are accepted for CY2544QC016T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY2544QC016T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY2544QC016T?
CY2544QC016T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY2544QC016T 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 CY2544QC016T?
For technical support, including CY2544QC016T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY2544QC016T requirements.
6.How does Aetrix verify that CY2544QC016T is sourced from the original manufacturer or authorized distributors?
All CY2544QC016T 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 CY2544QC016T meets industry standards.
7.What is the process for return or replacement of CY2544QC016T?
All CY2544QC016T units undergo pre-shipment inspection (PSI). If there is an issue with CY2544QC016T, 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 CY2544QC016T part is unused and in its original packaging.
Return procedure for CY2544QC016T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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