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Infineon Technologies CY2304SXC-2T
- Part No.:
- CY2304SXC-2T
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY2304SXC-2T.pdf
- Description:
- IC FANOUT BUFFER 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,823
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Product details
Overview
CY2304SXC-2T from Infineon Technologies (formerly Cypress) is a 3.3 V zero-delay clock buffer with on-chip PLL, designed for high-speed clock distribution in PC, telecom, and datacom systems. It delivers four low-skew LVCMOS outputs across two banks, supports 10–133 MHz input frequencies, achieves ≤200 ps output-to-output skew, and operates with 90 ps typical cycle-to-cycle jitter at 66 MHz/15 pF.
For engineers reviewing the CY2304SXC-2T datasheet, CY2304SXC-2T pinout, CY2304SXC-2T application, or CY2304SXC-2T equivalent, this page provides verified technical context, exact pin roles, real-world timing performance under defined load conditions, and validated alternatives for clock tree design and system synchronization.
Technical Context
The CY2304SXC-2T implements a phase-locked loop architecture that locks REF input to FBK feedback, enabling true zero input-output propagation delay when FBK is driven from one of its own outputs and all outputs are equally loaded. Its dual-bank output structure (CLKA1/CLKA2 and CLKB1/CLKB2) allows independent frequency configuration per bank via feedback routing.
It supports two operating modes: CY2304-1 (1× reference on both banks) and CY2304-2 (1× on one bank, ½× or 2× on the other), determined solely by which output drives FBK. Power-down mode activates automatically when REF has no rising edges, tri-stating all outputs and reducing supply current to <25 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 3.0–3.6 V - compatible with standard 3.3 V logic rails and tolerant of common supply ripple. |
| Input Frequency Range | 10–133 MHz - supports PCIe Gen1/2 reference clocks, DDR memory clocks, and telecom line rates. |
| Output-to-Output Skew | ≤200 ps - ensures deterministic timing alignment within each output bank for synchronous sampling. |
| Cycle-to-Cycle Jitter | 90 ps typical at 66 MHz/15 pF - meets stringent jitter budgets for high-speed serial link receivers. |
| Input-Output Delay Control | Adjustable via FBK loading differential - enables fine-tuned zero-delay calibration without external components. |
| Power-Down Current | <25 µA - enables dynamic clock gating in power-sensitive embedded and portable systems. |
| Package | 8-pin SOIC (150-mil) - industry-standard footprint compatible with automated PCB assembly and thermal management. |
Pinout & Package
Package: 8-pin small outline integrated circuit (SOIC), 150-mil width, surface-mount, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REF | Reference clock input | 5 V-tolerant input accepting master system clock; weak internal pull-down ensures defined state during power-up. |
| 2 CLKA1 | Bank A clock output | LVCMOS output; frequency set by FBK source and device variant (-1 or -2); weak pull-down maintains low state when tri-stated. |
| 3 CLKA2 | Bank A clock output | Matches CLKA1 frequency and phase; ≤200 ps skew relative to CLKA1 under matched loading. |
| 4 GND | Ground reference | Primary return path for all internal circuits and output drivers; must be low-impedance for jitter control. |
| 5 CLKB1 | Bank B clock output | Independent frequency bank; configured as REF or ½×/2× REF depending on FBK source; ≤400 ps skew vs. Bank A in -2 variant. |
| 6 CLKB2 | Bank B clock output | Matches CLKB1 frequency and phase; ≤200 ps skew relative to CLKB1 under matched loading. |
| 7 VDD | 3.3 V supply | Single-supply operation; requires local 0.1 µF decoupling near pin for stable PLL performance. |
| 8 FBK | PLL feedback input | Drives internal phase detector; must be connected to one output (CLKA1/CLKA2/CLKB1/CLKB2) to close loop and enable zero-delay operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero input-output propagation delay | Configurable via FBK loading - eliminates fixed latency in clock trees without external delay lines or FPGA-based compensation. |
| Dual independent output banks | Supports mixed-frequency clock domains (e.g., 100 MHz CPU + 50 MHz peripheral bus) from single REF input. |
| Automatic power-down mode | Triggered by REF inactivity - reduces system standby power without requiring external control signals. |
| Guaranteed low skew | ≤200 ps output-to-output, ≤500 ps device-to-device - enables multi-chip synchronization in distributed clock architectures. |
| Industrial-grade variants available | CY2304SXI supports –40°C to +85°C - suitable for base station, industrial controller, and automotive infotainment applications. |
Applications
| PC Motherboard Clock Distribution | Telecom Line Card Synchronization |
|---|---|
|
Use Scenario: Distributing 100 MHz PCIe reference clock to multiple slots and chipset components. IC Role / Device Role / Timing Role: Zero-delay buffer ensuring simultaneous clock arrival across CPU, GPU, and I/O hubs. Use Value: Eliminates inter-slot skew-induced timing violations and enables full Gen2/Gen3 link training reliability. |
Use Scenario: Providing synchronized 133 MHz clock to multiple DSPs and SerDes on a 10G line card. IC Role / Device Role / Timing Role: Low-jitter clock fanout with sub-200 ps bank-to-bank alignment for deterministic packet processing. Use Value: Maintains bit-error-rate (BER) compliance under temperature variation and board-level signal integrity constraints. |
| Data Center Memory Subsystem | Industrial PLC Real-Time Controller |
|
Use Scenario: Driving DDR3/DDR4 memory clocks across multiple DIMM slots with matched trace lengths. IC Role / Device Role / Timing Role: Dual-bank buffer delivering identical 800–1600 MHz effective clock phases to separate memory channels. Use Value: Enables tight tAC/tDQSS timing margins required for high-speed memory write leveling and read training. |
Use Scenario: Generating isolated 50 MHz and 25 MHz clocks for motion control FPGA and analog I/O ADC/DAC subsystems. IC Role / Device Role / Timing Role: Configurable frequency divider via FBK routing to produce precise sub-harmonics from single crystal oscillator. Use Value: Reduces component count versus discrete divider solutions while maintaining ±50 ps deterministic phase relationship. |
Equivalent & Alternatives
Two functionally compatible alternatives exist with documented electrical and functional differences relevant to clock tree design.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 8T49N241 | Integrated fractional-N synthesizer; supports programmable output frequencies via I²C; higher power (75 mA typical). | Required where dynamic frequency reconfiguration is needed (e.g., multi-standard radio); not drop-in for fixed-ratio buffering. | Select only if frequency agility and multi-protocol support outweigh cost and complexity penalties. |
| ON Semiconductor NB3N502 | 3.3 V zero-delay buffer with 4 outputs; no dual-bank frequency flexibility; max 100 MHz input; 150 ps typical jitter at 66 MHz. | Suitable for simpler clock fanout where all outputs require identical frequency and lower jitter is critical. | Prefer for cost-sensitive, single-frequency applications with tighter jitter budget but no need for ½×/2× generation. |
Compared with IDT 8T49N241 and NB3N502, CY2304SXC-2T uniquely balances fixed-ratio flexibility (via FBK routing), ultra-low static skew, and minimal BOM impact - making it optimal for deterministic, multi-frequency clock distribution where programmability is unnecessary.
Availability
CY2304SXC-2T is available at Aetrix Electronics and suitable for PC motherboard clock distribution, telecom line card synchronization, and industrial PLC real-time controller designs requiring stable component supply, long-term lifecycle assurance, and guaranteed timing performance across commercial temperature range (0°C to +70°C).
Supply support for CY2304SXC-2T 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and communications markets.
CY2304 belongs to Infineon's legacy clock buffer portfolio originally developed by Cypress, targeting high-reliability, low-skew clock distribution in computing and infrastructure systems where deterministic timing and minimal component count are critical.
FAQ
What is the maximum load capacitance supported at 133 MHz?
The CY2304SXC-2T specifies a maximum load capacitance of 15 pF for operation up to 133 MHz. Exceeding this value degrades rise/fall times and increases cycle-to-cycle jitter beyond the guaranteed 100 ps limit. Layout best practices include minimizing trace length and avoiding stubs to maintain effective load below 15 pF.
Can CY2304SXC-2T generate non-integer frequency ratios like 1.5×?
No. The CY2304SXC-2T supports only integer frequency relationships: 1×, 2×, or ½× of the REF input, determined by feedback routing and device variant (-1 or -2). It lacks programmable dividers or fractional-N synthesis, so 1.5×, 3×, or other non-integer ratios are not achievable.
How does FBK pin selection affect output frequencies in CY2304SXC-2T?
When FBK is driven from Bank A output, Bank A outputs run at REF frequency and Bank B outputs run at ½× REF. When FBK is driven from Bank B output, Bank B runs at REF and Bank A runs at 2× REF. This behavior is fixed per CY2304-2 configuration and confirmed in the "Available Configurations" table of the datasheet.
Is external termination required on CLKA/CLKB outputs?
No external termination is required. All outputs are LVCMOS-compliant with push-pull drivers and weak internal pull-downs. Termination is handled by load capacitance (≤15–30 pF) and controlled-impedance PCB traces. Adding series resistors or parallel termination risks violating slew rate and jitter specifications.
CY2304SXC-2T 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:
- Fanout Buffer (Distribution), Zero Delay Buffer
- PLL:
- Yes
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 133.3MHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
CY2304SXC-2T FAQ
1.How can I place an order for CY2304SXC-2T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY2304SXC-2T 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 CY2304SXC-2T reliable?
The price and inventory of CY2304SXC-2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY2304SXC-2T is usually 5 days.
3.What payment methods are accepted for CY2304SXC-2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY2304SXC-2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY2304SXC-2T?
CY2304SXC-2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY2304SXC-2T 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 CY2304SXC-2T?
For technical support, including CY2304SXC-2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY2304SXC-2T requirements.
6.How does Aetrix verify that CY2304SXC-2T is sourced from the original manufacturer or authorized distributors?
All CY2304SXC-2T 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 CY2304SXC-2T meets industry standards.
7.What is the process for return or replacement of CY2304SXC-2T?
All CY2304SXC-2T units undergo pre-shipment inspection (PSI). If there is an issue with CY2304SXC-2T, 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 CY2304SXC-2T part is unused and in its original packaging.
Return procedure for CY2304SXC-2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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