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Skyworks Solutions Inc. SL23EP04SI-1H
- Part No.:
- SL23EP04SI-1H
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL23EP04SI-1H.pdf
- Description:
- IC BUFFER 220MHZ 4CH 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
SL23EP04SI-1H from Silicon Laboratories is a high-drive, industrial-grade zero-delay buffer (ZDB) IC that distributes one reference clock to four low-skew, low-jitter outputs with 10–220 MHz operation at 3.3 V, 60 ps typical output skew, and 8 µA typical power-down current-used in clock-sensitive telecom and datacom systems.
For engineers reviewing the SL23EP04SI-1H datasheet, SL23EP04SI-1H pinout, SL23EP04SI-1H application, or SL23EP04SI-1H equivalent, key selection factors include its SpreadThru™ PLL for SSCG pass-through, dual-bank 2×2 output architecture with FBK feedback routing, and -40°C to +85°C industrial temperature rating in 8-pin SOIC.
Technical Context
The SL23EP04SI-1H integrates an on-chip SpreadThru™ PLL with internal 1.8 V regulation, enabling consistent skew/jitter performance across 2.5–3.3 V supply range. Its feedback pin (FBK) connects externally to one of four outputs to close the PLL loop, supporting configurable frequency relationships (1×, 2×, or 0.5×) depending on variant.
It features two independent output banks (A: CLKA1/CLKA2; B: CLKB1/CLKB2), each with weak-pull-down inputs/outputs (250 kΩ), and supports power-down mode via DC CLKIN detection-tri-stating all outputs and reducing supply current to 8 µA typ while disabling the PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency Range | 10–220 MHz at VDD = 3.3 V, CL = 15 pF - enables high-speed clock distribution in servers and routers without external frequency translation. |
| Output-to-Output Skew (Same Bank) | 60 ps typ - ensures tight timing alignment between CLKA1/CLKA2 or CLKB1/CLKB2 for synchronous multi-lane interfaces. |
| Power-Down Supply Current | 8 µA typ - minimizes standby power in systems requiring dynamic clock gating, e.g., energy-aware network switches. |
| Supply Voltage Range | 2.5 V to 3.3 V - compatible with both legacy 3.3 V and modern 2.5 V logic domains without level-shifting circuitry. |
| Output Drive Strength | High-drive (-1H/-2H) with 28 Ω typical output impedance - supports heavier capacitive loads and longer traces while maintaining signal integrity up to 220 MHz. |
| Spread Spectrum Pass-Through | Full SSCG modulation preservation - allows use with spread-spectrum clock generators to reduce EMI without degrading spread profile or modulation frequency. |
| Industrial Temperature Range | -40°C to +85°C - qualified for deployment in uncontrolled environments such as base station equipment and industrial controllers. |
Pinout & Package
SL23EP04SI-1H is housed in an 8-pin SOIC (150 mil) package with standard JEDEC outline and RoHS-compliant finish. Pin 1 is marked with a notch or dot; device orientation follows industry-standard SOIC conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN (Pin 1) | Reference clock input | Accepts single-ended CMOS clock; includes 250 kΩ weak pull-down for DC detection and power-down activation. |
| CLKA1 / CLKA2 (Pins 2, 3) | Bank-A buffered outputs | Matched outputs sharing same PLL feedback path; require equal loading for minimal bank-internal skew. |
| GND (Pin 4) | Power ground | Primary return path for VDD and all I/O; must be connected to low-impedance PCB ground plane. |
| CLKB1 / CLKB2 (Pins 5, 6) | Bank-B buffered outputs | Independent from Bank-A; delay relative to CLKIN adjustable via FBK load capacitance. |
| VDD (Pin 7) | Power supply | 2.5–3.3 V input powering I/O and internal regulator; requires 0.1 µF decoupling capacitor placed adjacent to pin. |
| FBK (Pin 8) | PLL feedback input | Must connect externally to one output (CLKA1/CLKA2/CLKB1/CLKB2); determines PLL lock point and frequency relationship. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Delay Buffer Architecture | Input-to-output delay adjustable via FBK load; achieves near-zero delay when all outputs-including FBK-are identically loaded. |
| Dual-Bank Output Configuration | Two independent 2-output banks enable differential routing strategies and localized skew control per subsystem. |
| SpreadThru™ PLL | Preserves input spread-spectrum characteristics end-to-end-no added jitter or modulation distortion-critical for FCC/CE EMI compliance. |
| Power-Down Mode | Automatic Hi-Z output state and PLL shutdown upon DC CLKIN detection, reducing system idle power without external control logic. |
| Industrial Temperature Rating | Validated operation from -40°C to +85°C ensures reliability in telecom infrastructure and embedded industrial hardware. |
Applications
| Printers & MFPs | Routers & Switches |
|---|---|
Use Scenario: Synchronizing image processing pipelines, scanner engines, and print controller buses in multifunction peripherals. IC Role / Device Role / Timing Role: Zero-delay clock buffer distributing master pixel clock and system bus clocks across ASICs and FPGAs. Use Value: 60 ps typical output skew ensures precise timing alignment between scan line capture and rendering units, minimizing image artifacts. |
Use Scenario: Clocking multiple Ethernet PHYs, packet processors, and memory interfaces in Layer 2/3 switching platforms. IC Role / Device Role / Timing Role: High-drive ZDB delivering synchronized 125 MHz/156.25 MHz clocks to SerDes lanes and control logic. Use Value: 220 MHz max frequency and 28 Ω drive strength support long-trace, multi-drop clock trees without signal degradation. |
| Servers & Workstations | Datacom Line Cards |
Use Scenario: Distributing PCIe reference clocks and memory controller clocks across CPU, chipset, and DIMM slots in dense server boards. IC Role / Device Role / Timing Role: Low-jitter clock fanout buffer with SpreadThru™ capability for EMI-sensitive backplane timing. Use Value: Full SSCG pass-through reduces radiated emissions by >10 dB while maintaining cycle-to-cycle jitter ≤100 ps at 133 MHz. |
Use Scenario: Providing phase-aligned clocks to multiple DSPs, ADCs, and FPGA-based framer/mapper circuits on telecom line cards. IC Role / Device Role / Timing Role: Industrial-grade ZDB operating at -40°C to +85°C with FBK-configurable frequency scaling (1×/2×). Use Value: Device-to-device skew ≤150 ps typ ensures deterministic inter-ASIC timing across hot-swappable modules. |
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™; higher power (25 mA @ 100 MHz); 100 ps typ skew | Supports larger fanout but lacks SSCG pass-through and industrial temp grade | Choose when >4 outputs needed and EMI reduction via spread spectrum is not required |
| ICS85302AMLF | 4-output, 2.5/3.3 V, no integrated PLL; relies on external feedback; 120 ps typ skew | Requires external loop filter and oscillator; less integrated than SL23EP04SI-1H | Prefer when design already uses discrete PLL components and board space permits external compensation |
Compared with IDT5V9885BGI and ICS85302AMLF, SL23EP04SI-1H delivers superior integration (on-die PLL + SpreadThru™), lower skew (60 ps vs ≥100 ps), and guaranteed industrial temperature operation-making it optimal for compact, EMI-constrained, thermally demanding clock distribution.
Availability
SL23EP04SI-1H is available at Aetrix Electronics and suitable for routers, servers, and industrial datacom equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SL23EP04SI-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, wireless, and MCU solutions, with deep expertise in precision clock generation and low-jitter signal integrity.
The SL23EP04 product line was designed specifically for high-fidelity clock distribution in data-intensive systems-emphasizing zero-delay accuracy, spread-spectrum compatibility, and robust industrial operation.
FAQ
What is the maximum operating frequency of SL23EP04SI-1H at 2.5 V supply?
The SL23EP04SI-1H supports up to 170 MHz at VDD = 2.5 V with CL = 15 pF load, as specified in the I-Grade switching characteristics table. This is lower than its 220 MHz capability at 3.3 V due to reduced drive strength and propagation margin at lower voltage.
Does SL23EP04SI-1H support spread-spectrum clocking?
Yes, SL23EP04SI-1H implements SpreadThru™ technology that preserves the input spread-spectrum modulation-including spread percentage, profile, and modulation frequency-across all four outputs without degradation, enabling EMI reduction in compliant systems.
How does the FBK pin affect SL23EP04SI-1H output timing?
The FBK pin closes the internal PLL loop and directly determines input-to-output delay. Loading FBK differently than the output banks introduces controllable delay offset between Bank A and Bank B; matching FBK load to output loads achieves true zero-delay operation for all outputs.
What happens to SL23EP04SI-1H outputs during power-down mode?
When CLKIN is held DC (GND to VDD), SL23EP04SI-1H detects this condition and forces all four outputs (CLKA1, CLKA2, CLKB1, CLKB2) into high-impedance (Hi-Z) state while disabling the PLL-reducing supply current to 8 µA typ and eliminating clock-related power consumption.
Is SL23EP04SI-1H pin-compatible with other SL23EP04 variants?
Yes, all SL23EP04 variants-including SL23EP04SI-1H, SL23EP04SI-1, SL23EP04SC-1H-share identical 8-pin SOIC footprint and pinout. Differences are limited to drive strength, frequency limits, and temperature grade-not physical layout or signal assignment.
SL23EP04SI-1H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes
- Input:
- Clock
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 220MHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 2.97V ~ 3.63V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
SL23EP04SI-1H FAQ
1.How can I place an order for SL23EP04SI-1H through Aetrix?
Please submit a Request for Quotation (RFQ) for SL23EP04SI-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 SL23EP04SI-1H reliable?
The price and inventory of SL23EP04SI-1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL23EP04SI-1H is usually 5 days.
3.What payment methods are accepted for SL23EP04SI-1H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL23EP04SI-1H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL23EP04SI-1H?
SL23EP04SI-1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL23EP04SI-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 SL23EP04SI-1H?
For technical support, including SL23EP04SI-1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL23EP04SI-1H requirements.
6.How does Aetrix verify that SL23EP04SI-1H is sourced from the original manufacturer or authorized distributors?
All SL23EP04SI-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 SL23EP04SI-1H meets industry standards.
7.What is the process for return or replacement of SL23EP04SI-1H?
All SL23EP04SI-1H units undergo pre-shipment inspection (PSI). If there is an issue with SL23EP04SI-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 SL23EP04SI-1H part is unused and in its original packaging.
Return procedure for SL23EP04SI-1H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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