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Skyworks Solutions Inc. SL23EP04SC-1T
- Part No.:
- SL23EP04SC-1T
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL23EP04SC-1T.pdf
- Description:
- IC BUFFER 220MHZ 4CH 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,722
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Product details
Overview
SL23EP04SC-1T 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 10–167 MHz operation at 3.3 V, 60 ps typical output skew, and 8 µA typical power-down current. It serves as a timing distribution hub in high-speed digital systems requiring precise clock fanout without added latency.
For engineers reviewing the SL23EP04SC-1T datasheet, SL23EP04SC-1T pinout, SL23EP04SC-1T application, or SL23EP04SC-1T equivalent, this page delivers verified electrical specs, bank-A/B output configuration logic, SpreadThru™ SSCG compatibility, and industrial-grade thermal resistance data - all specific to the -1T commercial-grade tape-and-reel variant in 8-pin SOIC.
Technical Context
The SL23EP04SC-1T integrates an on-chip PLL with internal feedback path routed via the FBK pin, enabling true zero-input-to-output delay when FBK is connected to any of the four outputs and load matching is maintained across banks. Its dual-bank architecture (CLKA1/CLKA2 and CLKB1/CLKB2) supports independent frequency scaling: the -1 variant locks output frequency 1:1 to CLKIN, while -2 variants support ×2, ×1, or ÷2 multiplication/division depending on FBK routing.
It operates across 3.3 V ±10% (2.97–3.63 V) with internal 1.8 V PLL regulation for stable jitter and skew performance. Power-down mode activates automatically on DC CLKIN (GND–VDD), tri-stating all outputs and reducing supply current to 8 µA typical - critical for low-power system sleep states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 10–167 MHz at 3.3 V (C-grade), CL = 15 pF - defines maximum usable clock rate for synchronous bus interfaces. |
| Output-to-Output Skew (Same Bank) | 70 ps typical - ensures tight timing alignment between CLKA1/CLKA2 or CLKB1/CLKB2 for parallel data capture. |
| Input-to-Output Delay | ±70 ps - enables sub-100 ps deterministic phase alignment between CLKIN and any output under matched loading. |
| Power Supply Current | 12 mA typical at 66 MHz, 3.3 V - determines thermal budget and decoupling capacitor sizing (0.1 µF required). |
| Power-Down Current | 8 µA typical - allows deep-sleep state retention without external enable control. |
| Spread Spectrum Pass-Through | Supports SpreadThru™ - preserves input SSC modulation %, profile, and frequency at all outputs, reducing EMI in PCIe/USB host systems. |
| Output Drive Strength | Standard drive (ROUT = 40 Ω) - matches 50 Ω PCB traces with series termination for signal integrity up to 167 MHz. |
Pinout & Package
SL23EP04SC-1T is housed in an industry-standard 8-pin SOIC (150 mil) package with gull-wing leads, RoHS-compliant, and rated for 0°C to +70°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CLKIN | Reference clock input | Accepts single-ended CMOS clock; weak 250 kΩ pull-down ensures defined state during power-up or idle. |
| 2: CLKA1 | Bank-A output #1 | Buffered copy of CLKIN (1×) - used for primary data-path clocking in memory or I/O subsystems. |
| 3: CLKA2 | Bank-A output #2 | Matched skew output to CLKA1 - enables dual-lane clocking (e.g., DDR DQS/DQ) with <70 ps inter-output deviation. |
| 4: GND | Power ground | Return path for all internal circuitry; must be low-impedance plane adjacent to VDD decoupling. |
| 5: CLKB1 | Bank-B output #1 | Independent buffered output; skew vs. CLKA1 depends on FBK routing and load balance - adjustable for delay tuning. |
| 6: CLKB2 | Bank-B output #2 | Second Bank-B output; identical drive and timing characteristics to CLKB1 for mirrored peripheral clocking. |
| 7: VDD | Supply voltage | 2.97–3.63 V input powering I/O buffers and internal regulator; requires local 0.1 µF ceramic decoupling. |
| 8: FBK | PLL feedback input | Must connect externally to one output (CLKA1/CLKA2/CLKB1/CLKB2); determines PLL lock point and output frequency ratio. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-delay architecture with programmable feedback | Enables sub-100 ps input-to-output alignment by closing PLL loop through user-selected output, eliminating fixed propagation delay. |
| Dual-bank 4-output topology | Allows independent clock domains: e.g., CLKA1/CLKA2 for CPU core, CLKB1/CLKB2 for peripheral bus - reducing crosstalk and layout complexity. |
| SpreadThru™ spread-spectrum pass-through | Maintains original SSC modulation at all outputs - meets FCC Class B EMI limits without additional filtering or clock scrubbing. |
| Auto power-down on DC input | Detects static CLKIN (GND–VDD) and disables PLL + outputs, cutting supply current to 8 µA - eliminates need for external enable logic. |
| Load-matched skew optimization | Output skew minimized only when all outputs (including FBK) drive identical capacitive loads - guides PCB trace length and termination design. |
Applications
| Printers & MFPs | Routers & Switches |
|---|---|
|
Use Scenario: Synchronizing image processing pipeline (scan engine, RIP, print head driver) with shared memory and interface controllers. IC Role / Device Role / Timing Role: Zero-delay clock fanout IC distributing master pixel clock and data strobes across multiple ASICs and FPGAs. Use Value: 70 ps same-bank skew ensures simultaneous latch timing across parallel video data paths, preventing image tearing or misalignment. |
Use Scenario: Providing synchronized clocks to Ethernet PHYs, packet processors, and management MCU in multi-port L2/L3 switches. IC Role / Device Role / Timing Role: Low-jitter clock distributor generating matched 125 MHz and 25 MHz clocks from single 125 MHz reference. Use Value: 100 ps cycle-to-cycle jitter at 133 MHz maintains IEEE 802.3 compliance margins for SERDES eye opening and BER performance. |
| PC Workstations | Datacom Backplanes |
|
Use Scenario: Fanout of PCIe reference clock (100 MHz) to multiple slots and chipset components while meeting PCI-SIG jitter requirements. IC Role / Device Role / Timing Role: SpreadThru™-enabled ZDB passing SSC-modulated reference to all downstream receivers without degradation. Use Value: Preserves 0.25–1.0% spread spectrum modulation depth and 30–33 kHz center frequency - critical for PCIe Gen3 EMI certification. |
Use Scenario: Clock distribution across backplane slots in modular telecom chassis, where skew between line cards must be minimized. IC Role / Device Role / Timing Role: High-reliability clock repeater driving differential fanout via LVDS translators, using CLKA/CLKB banks for isolated domains. Use Value: 150 ps device-to-device skew allows deterministic inter-slot synchronization for TDM or CPRI frame alignment. |
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 853S0101AKLFT | Single 1:1 output, no FBK pin, fixed 10–200 MHz range, 3.3 V only, 55 ps skew | Lacks multi-output flexibility and frequency scaling; suited only for simple 1-to-1 buffering | Select when only one clean replica is needed and board space is constrained - not for 4-output or SSC pass-through use cases. |
| ON Semiconductor NB3N502MNR2G | 2-output ZDB, 10–170 MHz, 3.3 V, 80 ps skew, no SpreadThru™, no power-down mode | No FBK-based frequency scaling or auto shutdown; limited to basic fanout without EMI reduction features | Choose for cost-sensitive, non-SSCG designs where dual-clock isolation suffices and ultra-low standby current is unnecessary. |
Compared with IDT 853S0101AKLFT and ON Semi NB3N502MNR2G, the SL23EP04SC-1T uniquely delivers four matched outputs with programmable feedback routing, SpreadThru™ SSC preservation, and automatic power-down - making it the only option among the three supporting complex, low-EMI, multi-domain clock trees in commercial-grade systems.
Availability
SL23EP04SC-1T is available at Aetrix Electronics and suitable for printers, network switches, PC workstations, and datacom backplanes requiring stable component supply with full tape-and-reel logistics support.
Supply support for SL23EP04SC-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, wireless, and MCU solutions, with headquarters in Austin, Texas.
The SL23EP04 product line was designed specifically for high-fidelity clock distribution in commercial and industrial embedded systems, emphasizing low skew, jitter resilience, and spread-spectrum compatibility - targeting applications where timing integrity directly impacts system-level throughput and EMI compliance.
FAQ
What is the maximum operating frequency of the SL23EP04SC-1T at 3.3 V?
The SL23EP04SC-1T supports up to 167 MHz at 3.3 V with 15 pF load capacitance in commercial-grade (0°C to +70°C) conditions. This limit applies specifically to the -1 variant (1× output ratio); higher frequencies require the -1H high-drive version, which reaches 220 MHz but is not represented by the SL23EP04SC-1T part number.
Does the SL23EP04SC-1T support spread-spectrum clocking (SSC)?
Yes, the SL23EP04SC-1T implements SpreadThru™ technology, which passes the full spread-spectrum modulation - including spread percentage, profile, and modulation frequency - from CLKIN to all four outputs without degradation. This capability is confirmed in the datasheet's "SpreadThru™ Feature" section and applies directly to the SL23EP04SC-1T.
How does the FBK pin affect output frequency on the SL23EP04SC-1T?
On the SL23EP04SC-1T (a -1 variant), the FBK pin must be connected to one output to close the PLL loop, but output frequency remains strictly 1× the CLKIN frequency. Unlike -2 variants, the SL23EP04SC-1T does not support ×2 or ÷2 multiplication - its FBK role is solely for zero-delay locking, not frequency translation.
What happens to outputs when CLKIN is held static on the SL23EP04SC-1T?
When CLKIN is driven DC (GND to VDD), the SL23EP04SC-1T detects this condition and enters power-down mode: all four outputs go high-impedance (tri-state), the PLL shuts off, and supply current drops to 8 µA typical. This behavior is intrinsic to the SL23EP04SC-1T and requires no external control signal.
Is the SL23EP04SC-1T pin-compatible with other SL23EP04 variants?
Yes - all SL23EP04 variants, including SL23EP04SC-1T, share identical 8-pin SOIC packaging and pinout. However, functional differences exist: SL23EP04SC-1T is a standard-drive, commercial-grade, 1× output variant; substituting -1H, -2, or -2H versions requires validation of drive strength, frequency range, and FBK routing logic per application.
SL23EP04SC-1T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-1T FAQ
1.How can I place an order for SL23EP04SC-1T through Aetrix?
Please submit a Request for Quotation (RFQ) for SL23EP04SC-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 SL23EP04SC-1T reliable?
The price and inventory of SL23EP04SC-1T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL23EP04SC-1T is usually 5 days.
3.What payment methods are accepted for SL23EP04SC-1T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL23EP04SC-1T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL23EP04SC-1T?
SL23EP04SC-1T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL23EP04SC-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 SL23EP04SC-1T?
For technical support, including SL23EP04SC-1T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL23EP04SC-1T requirements.
6.How does Aetrix verify that SL23EP04SC-1T is sourced from the original manufacturer or authorized distributors?
All SL23EP04SC-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 SL23EP04SC-1T meets industry standards.
7.What is the process for return or replacement of SL23EP04SC-1T?
All SL23EP04SC-1T units undergo pre-shipment inspection (PSI). If there is an issue with SL23EP04SC-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 SL23EP04SC-1T part is unused and in its original packaging.
Return procedure for SL23EP04SC-1T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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