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Skyworks Solutions Inc. SL23EP05SI-1H
- Part No.:
- SL23EP05SI-1H
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL23EP05SI-1H.pdf
- Description:
- IC BUFFER 220MHZ 5CH 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,198
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Product details
Overview
SL23EP05SI-1H from Silicon Laboratories is a low-jitter, low-skew zero-delay buffer (ZDB) IC designed for high-speed clock distribution in industrial-grade systems. It accepts one reference clock input (CLKIN) and generates five synchronized output clocks (CLK1–CLK4, CLKOUT) using an on-chip SpreadThru™ PLL. Operating at 10–220 MHz (3.3 V, high-drive), it delivers 50 ps typical cycle-to-cycle jitter, 30 ps typical output-to-output skew, and enters <10 μA power-down mode when input falls below 2.0 MHz - used in routers, servers, and digital copiers.
For engineers reviewing the SL23EP05SI-1H datasheet, SL23EP05SI-1H pinout, SL23EP05SI-1H application, or SL23EP05SI-1H equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), high-drive output capability (12 mA), 8-pin SOIC packaging, Spread Spectrum Clock (SSC) pass-through compatibility, and zero-delay architecture requiring CLKOUT feedback loading control.
Technical Context
The SL23EP05SI-1H implements a SpreadThru™ PLL architecture that preserves spread-spectrum modulation characteristics from input to all outputs without degradation in spread percent, profile, or frequency. Its internal feedback path uses CLKOUT, enabling true zero-delay operation when external loads are matched across all outputs.
It supports dual supply voltages (2.5 V and 3.3 V) with dedicated drive strength variants: the "–1H" suffix denotes high-drive mode (12 mA sink/source), enabling operation up to 220 MHz at 3.3 V and 180 MHz at 2.5 V. Power-down activation occurs automatically below 2.0 MHz input frequency, tri-stating all outputs and disabling the PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 10–220 MHz at 3.3 V (high-drive); enables high-speed clock fanout in server backplanes and switch fabric timing. |
| Cycle-to-Cycle Jitter | 50 ps typical (3.3 V, >66 MHz, <15 pF, standard drive); ensures stable sampling margins in DDR and PCIe clock trees. |
| Output-to-Output Skew | 30 ps typical (3.3 V, all outputs unloaded); guarantees tight phase alignment across multi-lane interfaces like SATA or USB PHYs. |
| Supply Voltage Range | 2.3–2.7 V or 3.0–3.6 V; compatible with both 2.5 V and 3.3 V system rails without level-shifting circuitry. |
| Power-Down Current | <10 μA (commercial grade); reduces standby power in sleep-mode network equipment and MFPs. |
| Output Drive Strength | 12 mA sink/source (high-drive); drives heavier capacitive loads (up to 30 pF) at >135 MHz without external buffers. |
| Operating Temperature | –40°C to +85°C (industrial grade); qualified for deployment in uncontrolled thermal environments like telecom chassis. |
Pinout & Package
SL23EP05SI-1H is housed in an 8-pin SOIC package (150 mil width) with exposed pad not present; footprint matches JEDEC MS-012AC. Pin assignments are fixed and non-configurable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – CLKIN | Input | Reference clock input with weak internal pull-down (150 kΩ); must be driven by clean CMOS/LVCMOS source. |
| 2 – CLK2 | Output | Buffered clock output (bank A); identical electrical specs to CLK1/CLK3/CLK4; load-matching required for skew control. |
| 3 – CLK1 | Output | Buffered clock output (bank A); shares same driver stage as CLK2; used for synchronous data capture in parallel buses. |
| 4 – GND | Power | Dedicated ground return; requires local 0.1 μF decoupling capacitor placed adjacent to pin per layout guidelines. |
| 5 – CLK3 | Output | Buffered clock output (bank B); electrically isolated from bank A for reduced crosstalk in mixed-signal systems. |
| 6 – VDD | Power | Single-supply input (2.5 V or 3.3 V); powers internal PLL and all output drivers; internal 1.8 V regulator stabilizes PLL performance. |
| 7 – CLK4 | Output | Buffered clock output (bank B); complements CLK3 for dual-bank clocking of memory controllers or FPGA I/O banks. |
| 8 – CLKOUT | Output / Feedback | Primary feedback path to internal PLL; must match loading of other outputs to achieve zero input-output delay; adds 2 pF on-chip load. |
Key Features
| Feature | Design Value |
|---|---|
| SpreadThru™ PLL | Passes SSC modulation unchanged from CLKIN to all outputs - critical for EMI reduction in certified computing platforms. |
| Zero-Delay Architecture | Eliminates cumulative propagation delay across clock tree; achieved via CLKOUT feedback and matched external loading. |
| High-Drive Output Option | 12 mA drive strength supports longer traces and higher fanout without signal integrity degradation at 220 MHz. |
| Auto Power-Down Mode | Disables PLL and tri-states outputs below 2.0 MHz input - eliminates clock-related leakage in idle states. |
| Industrial Temperature Grade | Rated for –40°C to +85°C operation; validated for use in embedded networking and industrial automation hardware. |
Applications
| Network Switch Timing | Server Backplane Clocking |
|---|---|
|
Use Scenario: Distributing a single 156.25 MHz reference clock to multiple SerDes lanes and management controllers in a 1U rack-mounted switch. IC Role / Device Role / Timing Role: Zero-delay buffer providing five phase-aligned outputs with sub-30 ps skew to synchronize Ethernet PHYs and packet processors. Use Value: Enables deterministic latency across 10G/25G ports while maintaining SSC compliance for FCC/CE emissions certification. |
Use Scenario: Fanout of a 100 MHz system clock to CPU, memory controller, BMC, and PCIe root complex in a dual-socket server motherboard. IC Role / Device Role / Timing Role: High-drive ZDB delivering 220 MHz capability at 3.3 V to drive heavily loaded traces across large PCB area. Use Value: Reduces need for multiple discrete buffers, lowering BOM cost and board space while meeting Intel CRB skew requirements. |
| Digital Copier Engine Control | Industrial MFP Real-Time Processing |
|
Use Scenario: Synchronizing image sensor readout, laser diode modulation, and paper transport motors in a multifunction printer/copier. IC Role / Device Role / Timing Role: Industrial-grade clock distributor generating matched clocks for ASIC, FPGA, and motor drivers under variable thermal conditions. Use Value: Maintains <50 ps jitter across –40°C to +85°C ambient, preventing frame misalignment and print artifacts. |
Use Scenario: Providing time-coherent clocks to ARM-based application processor, video encoder, and secure boot ROM in an industrial MFP. IC Role / Device Role / Timing Role: Low-power ZDB entering <10 μA shutdown during document scanning idle periods to extend system battery life. Use Value: Achieves 30% lower active power vs. legacy solutions while preserving timing accuracy during wake-up transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zero-delay buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT5V9885BGI | 8-output, 3.3 V only, no SpreadThru™; 75 ps typical cycle jitter; requires external feedback resistor. | Lacks SSC pass-through; unsuitable for EMI-sensitive computing platforms requiring spread spectrum compliance. | Choose IDT5V9885BGI only if additional outputs and simpler layout outweigh SSC requirement. |
| ON Semiconductor NB3N502MNR2G | 5-output, 2.5/3.3 V, no power-down mode; 65 ps typical cycle jitter; fixed 50 Ω output impedance. | Cannot enter ultra-low-power state; less suitable for battery-backed or energy-conscious industrial designs. | Select NB3N502MNR2G when guaranteed 50 Ω termination is preferred over dynamic drive strength adjustment. |
Compared with IDT5V9885BGI and NB3N502MNR2G, SL23EP05SI-1H uniquely combines SpreadThru™ SSC transparency, industrial temperature rating, auto power-down, and high-drive flexibility - making it optimal for EMI-constrained, thermally demanding, and power-aware clock distribution.
Availability
SL23EP05SI-1H is available at Aetrix Electronics and suitable for industrial networking equipment, server backplanes, and digital copier engine control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SL23EP05SI-1H 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 is a U.S.-based fabless semiconductor company specializing in timing, MCU, and wireless ICs, with design centers in Austin, Munich, and Taipei.
The SL23EP05 family was developed specifically for high-fidelity clock distribution in cost-sensitive, high-volume computing and imaging systems - emphasizing jitter, skew, and power efficiency over programmability.
FAQ
What is the maximum operating frequency of SL23EP05SI-1H at 2.5 V?
The SL23EP05SI-1H operates up to 180 MHz at 2.5 V supply voltage in high-drive mode, as specified in Table 8 of the datasheet. This limit is determined by internal PLL bandwidth and output driver performance under 2.5 V conditions. Exceeding this frequency may result in loss of lock or increased jitter. SL23EP05SI-1H maintains full functionality across its rated range without derating.
Does SL23EP05SI-1H support spread spectrum clocking (SSC)?
Yes, SL23EP05SI-1H implements SpreadThru™ technology, which passes spread-spectrum modulation from CLKIN to all outputs without altering spread percentage, profile, or modulation frequency. This feature is intrinsic to the PLL architecture and applies to SL23EP05SI-1H regardless of supply voltage or temperature grade.
How does SL23EP05SI-1H enter power-down mode?
SL23EP05SI-1H automatically enters power-down mode when the CLKIN input frequency drops below 2.0 MHz or stops toggling. In this state, the PLL is disabled, all five outputs (CLK1–CLK4 and CLKOUT) are tri-stated, and supply current falls to less than 10 μA. No external control signal is required - the detection circuit is internal and always active.
What package type is used for SL23EP05SI-1H?
SL23EP05SI-1H is supplied in an 8-pin SOIC package (150 mil width), per ordering code SL23EP05SI-1H in Table 10. This package is lead-free, RoHS-compliant, and compatible with standard surface-mount assembly processes. Thermal resistance is 110°C/W in still air, as documented in Table 6.
Is SL23EP05SI-1H pin-compatible with SL23EP05SC-1H?
Yes, SL23EP05SI-1H and SL23EP05SC-1H share identical pinout, package, and electrical interface - differing only in temperature grade (industrial –40°C to +85°C vs. commercial 0°C to +70°C) and test screening. Both use the same 8-pin SOIC footprint and functional pin assignments defined in Table 9.
SL23EP05SI-1H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes
- Input:
- Clock
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:5
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 220MHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
SL23EP05SI-1H FAQ
1.How can I place an order for SL23EP05SI-1H through Aetrix?
Please submit a Request for Quotation (RFQ) for SL23EP05SI-1H 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 SL23EP05SI-1H reliable?
The price and inventory of SL23EP05SI-1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL23EP05SI-1H is usually 5 days.
3.What payment methods are accepted for SL23EP05SI-1H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL23EP05SI-1H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL23EP05SI-1H?
SL23EP05SI-1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL23EP05SI-1H 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 SL23EP05SI-1H?
For technical support, including SL23EP05SI-1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL23EP05SI-1H requirements.
6.How does Aetrix verify that SL23EP05SI-1H is sourced from the original manufacturer or authorized distributors?
All SL23EP05SI-1H 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 SL23EP05SI-1H meets industry standards.
7.What is the process for return or replacement of SL23EP05SI-1H?
All SL23EP05SI-1H units undergo pre-shipment inspection (PSI). If there is an issue with SL23EP05SI-1H, 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 SL23EP05SI-1H part is unused and in its original packaging.
Return procedure for SL23EP05SI-1H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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