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Skyworks Solutions Inc. SL23EP04SC-1
- Part No.:
- SL23EP04SC-1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL23EP04SC-1.pdf
- Description:
- IC BUFFER 220MHZ 4CH 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,495
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Product details
Overview
SL23EP04SC-1 from Silicon Laboratories is a low-skew, low-jitter zero-delay buffer (ZDB) IC that distributes one reference clock input to four synchronized CMOS outputs with 1× frequency replication, operating from 10 MHz to 167 MHz at 3.3 V and supporting commercial temperature range (0°C to +70°C) in an 8-pin SOIC package. It integrates an on-chip SpreadThru™ PLL, supports FBK feedback from any output, and enters 8 µA power-down mode when CLKIN is DC.
For engineers reviewing the SL23EP04SC-1 datasheet, SL23EP04SC-1 pinout, SL23EP04SC-1 application, or SL23EP04SC-1 equivalent, key selection criteria include input-to-output delay stability (±70 ps), output-to-output skew (70 ps typical on same bank), 3.3 V supply compatibility, 1× fixed-frequency configuration, and commercial-grade thermal performance (θJA = 157 °C/W).
Technical Context
The SL23EP04SC-1 implements a SpreadThru™ PLL architecture that preserves spread-spectrum characteristics of SSCG inputs without degradation in spread percent or modulation frequency. Its feedback path (FBK) connects externally to one of four outputs-CLKA1, CLKA2, CLKB1, or CLKB2-to close the internal PLL loop, enabling true zero-delay operation when load matching is maintained across all outputs and FBK.
This variant is the standard-drive (-1), commercial-grade (C) version of the SL23EP04 family, configured for 1× input-to-output frequency translation only (unlike -2 variants offering /2, ×1, or ×2 options). It delivers 12 mA typical supply current at 66 MHz/3.3 V, with output impedance of 40 Ω and guaranteed operation up to 167 MHz under CL = 15 pF loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Zero-delay buffer (ZDB) with integrated PLL for clock distribution |
| Input Frequency Range | 10–167 MHz at VDD = 3.3 V, CL = 15 pF - defines max usable system clock rate |
| Output-to-Output Skew (Same Bank) | 70 ps typical - ensures tight timing alignment between CLKA1/CLKA2 or CLKB1/CLKB2 |
| Input-to-Output Delay | ±70 ps - enables precise phase-matched clock delivery critical for synchronous bus interfaces |
| Supply Voltage | 3.3 V ±10% - compatible with standard LVTTL/LVCMOS I/O domains and requires 0.1 µF local decoupling |
| Power-Down Current | 8 µA typical - allows full clock gating during idle states without external control logic |
| Operating Temperature | 0°C to +70°C - validated for commercial-grade embedded systems including printers and network infrastructure |
Pinout & Package
SL23EP04SC-1 is housed in an industry-standard 8-pin SOIC (150 mil) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliance. Thermal resistance is θJA = 157 °C/W (still air), requiring minimal heatsinking in typical PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLKIN | Reference clock input | Accepts single-ended CMOS/TTL clock; weak 250 kΩ pull-down ensures defined state when floating |
| 2 - CLKA1 | Bank-A output #1 | Buffered copy of CLKIN (1×); matched load required with CLKA2/FBK for zero-delay tuning |
| 3 - CLKA2 | Bank-A output #2 | Second buffered output in Bank A; identical drive strength and timing to CLKA1 |
| 4 - GND | Power ground | Primary return path for VDD and all I/O; must be low-impedance and adjacent to decoupling capacitor |
| 5 - CLKB1 | Bank-B output #1 | Buffered copy of CLKIN (1×); independent bank enables differential routing or separate load groups |
| 6 - CLKB2 | Bank-B output #2 | Second buffered output in Bank B; skew relative to Bank A adjustable via FBK load capacitance |
| 7 - VDD | Power supply | 2.5–3.3 V supply; powers I/O and internal regulator feeding 1.8 V PLL core |
| 8 - FBK | PLL feedback input | Must connect externally to one output (e.g., CLKA1); determines which bank drives PLL lock point |
Key Features
| Feature | Design Value |
|---|---|
| SpreadThru™ PLL | Passes spread-spectrum clock (SSCG) modulation intact - eliminates need for external jitter filtering in EMI-sensitive applications |
| Two-output banks (A/B) | Enables independent trace routing and load management - reduces crosstalk and simplifies layout for multi-sink clock trees |
| Programmable zero-delay tuning | Adjust input-to-output delay by varying FBK pin capacitance - supports fine-grained deskew without external delay lines |
| Low-power shutdown mode | 8 µA typical IDDPD - halts PLL and tri-states all outputs automatically on DC CLKIN, eliminating software-controlled enable logic |
| Weak internal pull-downs | 250 kΩ on CLKIN, CLKA1/2, CLKB1/2, FBK - prevents floating inputs during power-up/down and simplifies unused pin handling |
Applications
| Printers & MFPs | PCs & Workstations |
|---|---|
Use Scenario: Synchronizing image processing ASICs, memory controllers, and USB host interfaces in multifunction peripherals. IC Role / Device Role / Timing Role: Zero-delay clock buffer distributing master pixel clock and system bus clocks across multiple voltage domains. Use Value: 70 ps typical same-bank skew ensures simultaneous latch capture across parallel data paths, reducing timing margin overhead by >150 ps. |
Use Scenario: Driving front-side bus (FSB), memory controller, and PCIe root complex clocks in desktop motherboards. IC Role / Device Role / Timing Role: Low-jitter clock repeater delivering phase-aligned 100–133 MHz clocks to high-speed interfaces. Use Value: ±70 ps input-to-output delay tolerance enables direct replacement of legacy buffers without PCB rework or timing closure reanalysis. |
| Routers & Switches | Datacom Backplanes |
Use Scenario: Distributing reference clocks to multiple PHYs and packet processors in Layer 2/3 switching platforms. IC Role / Device Role / Timing Role: High-reliability clock fanout device with automatic power-down during link idle states. Use Value: 8 µA shutdown current minimizes standby power in always-on networking equipment meeting Energy Star requirements. |
Use Scenario: Providing matched clock signals to SERDES lanes and framer ICs in telecom line cards. IC Role / Device Role / Timing Role: Low-skew ZDB maintaining sub-100 ps inter-lane skew across backplane traces. Use Value: 150 ps max device-to-device skew allows deterministic clock domain crossing between 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 |
|---|---|---|---|
| IDT 85411GI-01LF | Fixed 1× output, 8-pin SOIC, 10–200 MHz range, 3.3 V only, no SpreadThru™ | Lacks SSCG pass-through; higher 125 ps typical output skew; requires external feedback resistor | Choose for cost-sensitive designs where spread-spectrum support is unnecessary and tighter skew is not required. |
| ON Semiconductor NB3N502MNR4G | 1× ZDB, 8-pin SOIC, 10–170 MHz, 3.3 V, integrated 50 Ω termination resistors | No FBK pin - fixed internal feedback; no programmable delay tuning; higher 15 mA typical IDD at 66 MHz | Prefer when board space is constrained and external termination is undesirable, accepting reduced flexibility in skew calibration. |
Compared with IDT 85411GI-01LF and NB3N502MNR4G, the SL23EP04SC-1 uniquely combines SpreadThru™ SSCG transparency, FBK-based delay tuning, and 70 ps typical same-bank skew - making it optimal for EMI-critical, high-precision clock distribution where dynamic deskew and spectral integrity are mandatory.
Availability
SL23EP04SC-1 is available at Aetrix Electronics and suitable for printers, PCs, routers, and datacom equipment requiring stable component supply, commercial-temperature timing accuracy, and long-term obsolescence mitigation.
Supply support for SL23EP04SC-1 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 fabless semiconductor company specializing in timing, MCU, and wireless solutions, headquartered in Austin, TX, with global design and support infrastructure.
The SL23EP04 product line was developed to address high-speed clock distribution needs in digital consumer, computing, and communications systems - emphasizing low skew, jitter resilience, and seamless integration of spread-spectrum clocking.
FAQ
What is the maximum operating frequency of the SL23EP04SC-1 at 3.3 V?
The SL23EP04SC-1 supports up to 167 MHz at 3.3 V with a 15 pF load, as specified in the C-grade electrical characteristics tables. This limit applies specifically to the -1 (standard drive) variant and assumes proper decoupling, matched loads, and ambient temperature within 0°C to +70°C.
Does the SL23EP04SC-1 support spread-spectrum clocking (SSCG)?
Yes, the SL23EP04SC-1 implements SpreadThru™ technology, allowing it to pass through spread-spectrum modulation from CLKIN to all outputs without altering spread percentage, profile, or modulation frequency - a feature confirmed in the General Description and SpreadThru™ Feature sections of the datasheet.
How does the SL23EP04SC-1 enter power-down mode?
The SL23EP04SC-1 automatically enters power-down mode when CLKIN is held DC (between GND and VDD), causing all four outputs to tri-state and the PLL to shut down. In this state, supply current drops to 8 µA typical, as verified in the DC Electrical Characteristics tables for C-grade operation at 3.3 V.
What is the purpose of the FBK pin on the SL23EP04SC-1?
The FBK pin is the PLL feedback input and must be connected externally to one of the four output clocks (CLKA1, CLKA2, CLKB1, or CLKB2). It determines the reference point for the internal PLL lock and enables zero-delay tuning by adjusting capacitive loading on the FBK trace relative to output banks.
Can the SL23EP04SC-1 be used in industrial temperature applications?
No - the SL23EP04SC-1 is rated for 0°C to +70°C (commercial grade). For industrial operation (-40°C to +85°C), the SL23EP04SI-1 or SL23EP04SI-1H variants must be selected, as explicitly stated in the Ordering Information table and Operating Conditions sections of the datasheet.
SL23EP04SC-1 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:
- 1:4
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 220MHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 2.97V ~ 3.63V
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
SL23EP04SC-1 FAQ
1.How can I place an order for SL23EP04SC-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SL23EP04SC-1 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 SL23EP04SC-1 reliable?
The price and inventory of SL23EP04SC-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL23EP04SC-1 is usually 5 days.
3.What payment methods are accepted for SL23EP04SC-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL23EP04SC-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL23EP04SC-1?
SL23EP04SC-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL23EP04SC-1 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 SL23EP04SC-1?
For technical support, including SL23EP04SC-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL23EP04SC-1 requirements.
6.How does Aetrix verify that SL23EP04SC-1 is sourced from the original manufacturer or authorized distributors?
All SL23EP04SC-1 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 SL23EP04SC-1 meets industry standards.
7.What is the process for return or replacement of SL23EP04SC-1?
All SL23EP04SC-1 units undergo pre-shipment inspection (PSI). If there is an issue with SL23EP04SC-1, 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 SL23EP04SC-1 part is unused and in its original packaging.
Return procedure for SL23EP04SC-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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