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Skyworks Solutions Inc. SL2309SC-1T
- Part No.:
- SL2309SC-1T
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL2309SC-1T.pdf
- Description:
- IC BUFFER 140MHZ 9CH 3.3V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
SL2309SC-1T from Silicon Laboratories is a 16-pin SOIC Zero Delay Buffer (ZDB) IC that distributes one reference clock to nine synchronized outputs with ≤140 ps cycle-to-cycle jitter, ≤150 ps output-to-output skew, and operation up to 100 MHz (standard drive, 30 pF load) at 3.3 V. It serves as a low-power clock distribution solution in PC motherboards and network routers.
For engineers reviewing the SL2309SC-1T datasheet, SL2309SC-1T pinout, SL2309SC-1T application, or SL2309SC-1T equivalent, key selection criteria include its PLL-bypass mode for non-zero-delay operation, dual-bank tri-state control via S1/S2 pins, and verified compatibility with 15–30 pF loads across commercial temperature range (0°C to 70°C).
Technical Context
The SL2309SC-1T integrates an on-chip SpreadThru™ PLL that locks to CLKIN and uses CLKOUT as internal feedback, enabling zero-input-to-output delay when load matching is applied. Its two independent clock banks (A and B, four outputs each) plus CLKOUT are controlled by S1 and S2 select inputs, supporting tri-state, PLL bypass, or full PLL-enabled modes.
It features weak internal pull-up (250 kΩ) on S1/S2 and weak pull-down (250 kΩ) on all clock I/Os, operates at 3.3 V ±10%, and draws ≤26 mA at 66 MHz - all confirmed in active PLL mode with CL = 0. Input frequency detection forces Hi-Z outputs and <12 µA shutdown current if CLKIN is DC or floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 10–100 MHz (standard drive, 30 pF load); enables reliable clock fanout in PCIe Gen1 and DDR1 systems. |
| Cycle-to-Cycle Jitter | ≤150 ps max (66 MHz, 15 pF, standard drive); ensures timing margin compliance in synchronous digital interfaces. |
| Output-to-Output Skew | ≤150 ps max (all outputs equally loaded); supports simultaneous sampling across multiple ASIC/FPGA domains. |
| Supply Voltage | 3.3 V ±10%; regulated internally to 1.8 V for PLL stability - eliminates need for external LDO in 3.3 V rail designs. |
| Power Consumption | 26 mA max at 66 MHz (S2=S1=1); reduces thermal load in dense server backplanes and MFP timing modules. |
| Temperature Range | 0°C to 70°C (Commercial grade); validated for use in printers, workstations, and consumer DTV platforms. |
| Package | 16-pin SOIC (150-mil); compatible with standard reflow profiles and legacy PCB assembly lines. |
Pinout & Package
SL2309SC-1T is housed in a 16-pin SOIC (150-mil) package with 1.27 mm pitch, 10.3 mm × 7.5 mm body size, and JEDEC MS-012AC compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLKIN | Reference clock input | Weak internal 250 kΩ pull-down; accepts LVCMOS-compatible 3.3 V clock; triggers shutdown if DC/floating. |
| 2–3,14–15 CLKA1–CLKA4 | Bank A clock outputs | Four buffered outputs; tri-statable via S1/S2; matched impedance (32 Ω typ) for standard drive. |
| 6–7,10–11 CLKB1–CLKB4 | Bank B clock outputs | Four buffered outputs; independently controllable from Bank A; same drive strength and loading specs. |
| 4,13 VDD | Power supply | Dual 3.3 V supply pins; require local 0.1 µF ceramic decoupling per pin, placed adjacent to package. |
| 5,12 GND | Ground | Dual ground pins; must be connected to solid ground plane to minimize power/ground bounce. |
| 8 S2, 9 S1 | Select control inputs | Weak 250 kΩ pull-up to VDD; decode bank enable/tri-state/PLL bypass per Table 2 in datasheet Rev 2.0. |
| 16 CLKOUT | PLL feedback output | Internal PLL feedback node; load must match Bank A/B outputs to achieve zero delay; adds ~2 pF parasitic capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| SpreadThru™ PLL architecture | Passes spread-spectrum modulation (SSCG) from input to all outputs without degradation in spread % or profile - critical for EMI reduction in DTV and PC platforms. |
| Dual-bank tri-state control | S1/S2 pins enable selective disabling of Bank A, Bank B, or both - cuts dynamic power by >50% when only four clocks are needed. |
| PLL bypass mode | S2=1, S1=0 disables PLL and routes CLKIN directly to all outputs - provides deterministic 1.5–8.7 ns propagation delay for timing-critical debug or legacy system integration. |
| Load-adaptive zero-delay tuning | Varying CLKOUT load vs. Bank A/B loads adjusts input-to-output delay - allows fine-tuning of clock alignment without external delay lines or FPGA-based deskew. |
| Input frequency detection | Automatically forces all outputs to Hi-Z and shuts down PLL if CLKIN is static or missing - prevents metastability in downstream logic and reduces system-level fault propagation. |
Applications
| Printers & MFPs | PCs and Workstations |
|---|---|
Use Scenario: Synchronizing print engine timing, scanner ADC sampling, and USB 2.0 interface clocks within a single-board multifunction peripheral. IC Role / Device Role / Timing Role: Zero-delay clock buffer distributing 25 MHz system clock to ASIC, image processor, and USB PHY with matched skew. Use Value: Eliminates inter-chip setup/hold violations across mixed-speed domains while maintaining <150 ps skew between scan-line capture and data transfer paths. | Use Scenario: Fanout of 100 MHz front-side bus (FSB) reference clock to northbridge, memory controller, and PCI Express root complex in desktop motherboards. IC Role / Device Role / Timing Role: Low-jitter ZDB ensuring phase-aligned clock delivery under varying load conditions across multi-layer PCB traces. Use Value: Enables stable FSB operation at rated speed without requiring trace-length matching or external termination resistors on clock nets. |
| Routers and Switches | Digital TVs |
Use Scenario: Distributing 125 MHz Ethernet PHY reference clock to multiple MAC controllers and packet buffer interfaces in Layer 3 switches. IC Role / Device Role / Timing Role: Clock distribution hub with tri-state capability to isolate unused ports during low-power link states. Use Value: Reduces idle power by 22 mA (vs. full-enable) while preserving fast wake-up latency due to no PLL relock requirement. | Use Scenario: Driving HDMI transmitter pixel clock, audio codec master clock, and video decoder core clock from a single crystal oscillator in HD set-top boxes. IC Role / Device Role / Timing Role: Spread-spectrum-capable ZDB passing SSC-modulated 74.25 MHz clock to meet FCC Class B EMI limits. Use Value: Achieves 6–10 dB EMI reduction across 150–1000 MHz band without adding external filtering components or redesigning layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zero-delay clock buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT 5V2310APG | 10-pin TSSOP; 3.3 V only; max 133 MHz; no PLL bypass; fixed 8-output configuration. | Lacks S1/S2 control and CLKOUT feedback tuning - unsuitable for zero-delay calibration or partial bank disable. | Choose only if board space is constrained and full feature set of SL2309SC-1T is unnecessary. |
| ON Semiconductor NB3N502MNR2G | 8-pin SOIC; 3.3 V; 2-output; no PLL; fixed non-zero delay (~3 ns); no tri-state or spread-spectrum support. | Provides basic fanout only - cannot replace SL2309SC-1T in systems requiring 9 outputs, skew control, or EMI reduction. | Select only for cost-sensitive, low-pin-count applications where jitter <200 ps and skew <300 ps are acceptable. |
Compared with IDT 5V2310APG and ON Semi NB3N502MNR2G, the SL2309SC-1T uniquely delivers nine configurable outputs, programmable tri-state per bank, PLL bypass for deterministic delay, and SpreadThru™ SSC pass-through - making it irreplaceable in high-integration timing architectures requiring both flexibility and EMI compliance.
Availability
SL2309SC-1T is available at Aetrix Electronics and suitable for printers and MFPs, PCs and workstations, and digital TVs requiring stable component supply throughout extended production lifecycles.
Supply support for SL2309SC-1T 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
Silicon Laboratories Inc. is a U.S.-based fabless semiconductor company specializing in timing, MCU, and connectivity solutions, with design centers in Austin, Munich, and Taipei.
The SL2309 product line was developed to address high-density clock distribution needs in cost-sensitive, high-volume digital consumer and computing platforms - emphasizing low jitter, flexible output control, and EMI-aware clock synthesis.
FAQ
What is the maximum operating frequency of SL2309SC-1T under standard drive and 30 pF load?
The SL2309SC-1T supports up to 66 MHz when configured in standard drive (-1) mode with 30 pF load per output, as specified in Table 1 of the Rev 2.0 datasheet. This limit applies in all active PLL modes and is validated across commercial temperature range (0°C to 70°C). Exceeding this frequency under those conditions may result in increased jitter or loss of lock.
Does SL2309SC-1T support spread-spectrum clocking (SSC)?
Yes, SL2309SC-1T implements SpreadThru™ technology that passes spread-spectrum modulation from CLKIN to all nine outputs without distortion in spread percentage, profile, or modulation frequency. This behavior is guaranteed in both PLL-enabled and PLL-bypass modes, making SL2309SC-1T suitable for EMI-sensitive DTV and PC applications requiring FCC Class B compliance.
How does the S1 and S2 pin configuration affect SL2309SC-1T output behavior?
S1 (Pin 9) and S2 (Pin 8) control SL2309SC-1T's functional state per Table 2: S2=0/S1=0 tri-states both banks and drives CLKOUT; S2=0/S1=1 enables Bank A only; S2=1/S1=0 bypasses PLL and drives all outputs directly from CLKIN; S2=1/S1=1 enables full PLL operation with all outputs active. Internal 250 kΩ pull-ups ensure defined state at power-up.
Is SL2309SC-1T pin-compatible with SL2309SC-1H?
Yes, SL2309SC-1T and SL2309SC-1H share identical 16-pin SOIC footprint, pinout, and electrical interface - differing only in drive strength (standard vs. high) and maximum frequency (100 MHz vs. 140 MHz under same load). No PCB changes are required when substituting SL2309SC-1T for SL2309SC-1H, though timing validation at higher frequencies must be repeated.
Why is SL2309SC-1T marked "Not Recommended for New Designs"?
SL2309SC-1T is marked "Not Recommended for New Designs" because Silicon Labs has superseded it with newer timing devices such as the SL23EP09 (supporting 10–220 MHz and 2.5–3.3 V operation) and Si5332 family (offering programmable jitter performance and multi-output flexibility). However, SL2309SC-1T remains fully supported for existing designs and is available through Aetrix Electronics with full lifecycle coordination.
SL2309SC-1T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes with Bypass
- Input:
- Clock
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:9
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 140MHz
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
SL2309SC-1T FAQ
1.How can I place an order for SL2309SC-1T through Aetrix?
Please submit a Request for Quotation (RFQ) for SL2309SC-1T 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 SL2309SC-1T reliable?
The price and inventory of SL2309SC-1T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL2309SC-1T is usually 5 days.
3.What payment methods are accepted for SL2309SC-1T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL2309SC-1T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL2309SC-1T?
SL2309SC-1T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL2309SC-1T 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 SL2309SC-1T?
For technical support, including SL2309SC-1T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL2309SC-1T requirements.
6.How does Aetrix verify that SL2309SC-1T is sourced from the original manufacturer or authorized distributors?
All SL2309SC-1T 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 SL2309SC-1T meets industry standards.
7.What is the process for return or replacement of SL2309SC-1T?
All SL2309SC-1T units undergo pre-shipment inspection (PSI). If there is an issue with SL2309SC-1T, 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 SL2309SC-1T part is unused and in its original packaging.
Return procedure for SL2309SC-1T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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