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Skyworks Solutions Inc. SL23EP04SC-2HT
- Part No.:
- SL23EP04SC-2HT
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SL23EP04SC-2HT.pdf
- Description:
- IC BUFFER 220MHZ 4CH 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
SL23EP04SC-2HT from Silicon Laboratories is a low-skew, low-jitter, low-power Zero Delay Buffer (ZDB) with integrated PLL, designed to distribute one reference clock across four buffered outputs for high-speed digital systems. It operates from 10–220 MHz at 3.3 V or 10–170 MHz at 2.5 V, delivers 60 ps typical output-to-output skew (same bank), and supports SpreadThru™ spread-spectrum clock pass-through in printers, routers, and embedded telecom equipment.
For engineers reviewing the SL23EP04SC-2HT datasheet, SL23EP04SC-2HT pinout, SL23EP04SC-2HT application, or SL23EP04SC-2HT equivalent, key selection criteria include its dual-bank 4-output architecture, FBK feedback pin configuration, -2H high-drive variant performance up to 220 MHz, and compatibility with commercial-grade (0°C to +70°C) SOIC-8 PCB layouts requiring precise clock skew control and SSCG support.
Technical Context
The SL23EP04SC-2HT implements an on-chip SpreadThru™ PLL that locks to CLKIN and replicates the input clock-optionally scaled by ×2, ×1, or ÷2 at outputs-with full spread-spectrum modulation preservation. Its two independent banks (A: CLKA1/CLKA2; B: CLKB1/CLKB2) enable flexible routing, while the FBK pin must be connected externally to one output to close the PLL loop.
It features weak internal pull-downs (250 kΩ) on all I/O pins, supports power-down mode (<12 µA typical supply current) when CLKIN is DC, and uses an internal 1.8 V regulator for stable PLL operation across 2.5–3.3 V VDD. Output drive strength is high-drive (-2H), delivering 12 mA sink/source capability and 28 Ω typical output impedance at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency Range | 10–220 MHz at VDD = 3.3 V; enables high-speed clock distribution in servers and datacom gear without external frequency translation. |
| Output-to-Output Skew (Same Bank) | 60 ps typical; ensures tight timing alignment between CLKA1/CLKA2 or CLKB1/CLKB2 for synchronous interface clocking. |
| Supply Voltage Range | 2.5 V to 3.3 V; compatible with mixed-voltage system designs and supports seamless migration from legacy 3.3 V to lower-power 2.5 V rails. |
| Power Supply Current | 12 mA typical at 66 MHz / 3.3 V; reduces thermal load and simplifies power delivery in dense PCB layouts. |
| Spread Spectrum Pass-Through | Full SSCG modulation retention via SpreadThru™; eliminates jitter degradation when used with spread-spectrum source clocks in EMI-sensitive applications. |
| Package | 8-pin SOIC (150 mil); industry-standard footprint enabling drop-in replacement and compatibility with automated SMT assembly lines. |
| Temperature Grade | Commercial (0°C to +70°C); validated for use in office equipment, PCs, and enterprise networking hardware operating in controlled environments. |
Pinout & Package
SL23EP04SC-2HT is housed in an 8-pin SOIC (150 mil) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliant dimensions. Pin 1 is marked with a notch or dot; recommended PCB pad layout follows IPC-7351B SOIC-8 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLKIN | Input | Reference clock input with 250 kΩ weak pull-down; accepts LVCMOS-compatible signals; triggers power-down if held DC. |
| 2 - CLKA1 | Output | Bank-A clock output; high-drive (-2H) capable of driving 12 mA; matched to CLKA2 for sub-60 ps skew. |
| 3 - CLKA2 | Output | Bank-A clock output; electrically identical to CLKA1; requires equal loading for zero-delay operation. |
| 4 - GND | Power | Dedicated ground return; must be connected to low-impedance system ground plane adjacent to decoupling capacitor. |
| 5 - CLKB1 | Output | Bank-B clock output; supports ×2, ×1, or ÷2 frequency options relative to CLKIN depending on FBK connection point. |
| 6 - CLKB2 | Output | Bank-B clock output; shares same drive strength and timing characteristics as CLKB1; paired for inter-bank skew control. |
| 7 - VDD | Power | 2.5–3.3 V supply input; powers I/O buffers directly and feeds internal 1.8 V regulator for PLL stability. |
| 8 - FBK | Input | PLL feedback input; must be connected externally to one of the four outputs to close control loop; determines frequency scaling mode. |
Key Features
| Feature | Design Value |
|---|---|
| Zero Delay Buffer Architecture | Eliminates cumulative propagation delay between CLKIN and outputs via internal PLL feedback, enabling true input-synchronized clock distribution. |
| SpreadThru™ PLL | Preserves input spread-spectrum modulation profile (spread %, frequency, shape) at all outputs-critical for EMI reduction in FCC/CE-compliant systems. |
| Two Independent Clock Banks | Allows differential frequency configurations: e.g., Bank A at ×1 and Bank B at ×2, supporting multi-clock-domain SoC interfaces without external dividers. |
| High-Drive (-2H) Output Stage | Delivers 12 mA drive strength and 28 Ω output impedance at 3.3 V, enabling robust signal integrity into 50 Ω traces or multiple loads without external buffers. |
| Programmable Power-Down Mode | Auto-enters <12 µA quiescent state when CLKIN is static (GND–VDD), reducing system standby power in sleep-mode network devices. |
Applications
| Printers & MFPs | Routers & Switches |
|---|---|
Use Scenario: Synchronizing image processing ASICs, memory controllers, and USB/Ethernet PHYs in multifunction peripherals. IC Role / Device Role / Timing Role: Zero-delay clock fanout IC distributing master pixel clock and system bus clock across heterogeneous subsystems. Use Value: 60 ps typical same-bank skew ensures setup/hold compliance for parallel video interfaces and DDR2 memory buses running at >133 MHz. |
Use Scenario: Providing synchronized clocks to packet processors, SERDES lanes, and management controllers in Layer 2/3 switching platforms. IC Role / Device Role / Timing Role: Low-jitter clock buffer enabling deterministic latency across CPU, switch fabric, and PHY domains. Use Value: SpreadThru™ support maintains EMI suppression while meeting IEEE 802.3 compliance for 10/100/1000BASE-T PHY timing. |
| PCs & Workstations | Datacom Equipment |
Use Scenario: Driving front-side bus, memory controller, and PCIe root complex clocks from a single crystal oscillator in desktop motherboards. IC Role / Device Role / Timing Role: High-drive ZDB replacing discrete logic buffers to reduce component count and board space. Use Value: 220 MHz max frequency and 12 mA drive allow direct interfacing with high-speed DDR2/DDR3 clock trees without level-shifting. |
Use Scenario: Distributing reference clocks to multiple line cards, timing modules, and framer ICs in modular telecom chassis. IC Role / Device Role / Timing Role: Industrial-grade clock repeater ensuring deterministic skew across hot-swappable modules. Use Value: 150 ps typical device-to-device skew enables coherent time-stamping across distributed data acquisition nodes. |
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 8T49N241 | Integrated fractional-N synthesizer; supports programmable output frequencies; higher power (35 mA typical); QFN-40 package. | Used where dynamic frequency reconfiguration is required (e.g., software-defined radio), not fixed-ratio fanout. | Select IDT 8T49N241 only if programmability and multi-frequency synthesis outweigh cost, size, and power penalties. |
| ON Semiconductor NB3N511 | 3.3 V only; 4-output LVCMOS ZDB; 100 ps typical skew; SOIC-8; no spread-spectrum support; lower drive (8 mA). | Suitable for cost-sensitive, non-SSCG applications like basic PC peripherals where EMI margin is sufficient. | Choose NB3N511 for simpler, lower-cost clock distribution where SpreadThru™ and -2H drive strength are unnecessary. |
Compared with IDT 8T49N241 and ON Semi NB3N511, SL23EP04SC-2HT uniquely balances high-frequency fanout (220 MHz), ultra-low skew (60 ps), spread-spectrum transparency, and SOIC-8 manufacturability-making it optimal for fixed-configuration, EMI-critical datacom and imaging systems.
Availability
SL23EP04SC-2HT is available at Aetrix Electronics and suitable for printers, routers, and PCs requiring stable component supply with commercial temperature grade and SOIC-8 compatibility.
Supply support for SL23EP04SC-2HT 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 fabless semiconductor company headquartered in Austin, Texas, specializing in timing, MCU, and connectivity solutions for embedded systems.
The SL23EP04 family was engineered for high-fidelity clock distribution in bandwidth-intensive digital equipment-including networking, computing, and imaging-where low skew, jitter, and EMI control are critical.
FAQ
What is the maximum operating frequency of SL23EP04SC-2HT at 2.5 V supply?
The SL23EP04SC-2HT supports up to 170 MHz at VDD = 2.5 V with CL = 15 pF load, per the C-grade electrical specifications. This limit reflects the reduced drive strength and increased rise/fall times at lower voltage, and applies specifically to the -2H high-drive variant in commercial temperature range.
Does SL23EP04SC-2HT support spread-spectrum clocking?
Yes, SL23EP04SC-2HT implements SpreadThru™ technology, which passes the full spread-spectrum modulation-including spread percentage, modulation frequency, and profile-from CLKIN to all four outputs without degradation, making it suitable for FCC/CE-compliant EMI reduction in datacom and consumer electronics.
How is the output frequency ratio configured on SL23EP04SC-2HT?
The SL23EP04SC-2HT output frequency ratio (×2, ×1, or ÷2) is determined by which output (CLKA1/CLKA2 or CLKB1/CLKB2) is connected to the FBK pin. For example, connecting FBK to CLKA1 configures Bank A at ×1 and Bank B at ×2; connecting FBK to CLKB1 sets Bank A at ×1 and Bank B at ÷2.
What happens to SL23EP04SC-2HT outputs when CLKIN is held static?
When CLKIN is held DC (GND to VDD), SL23EP04SC-2HT automatically enters Power Down mode: all four outputs go high-impedance (Hi-Z), the PLL shuts off, and supply current drops to 8–12 µA typical, preserving system power in idle or sleep states without external control logic.
Is SL23EP04SC-2HT pin-compatible with other variants in the SL23EP04 family?
Yes, SL23EP04SC-2HT shares identical 8-pin SOIC packaging and pinout with all SL23EP04 variants (e.g., SL23EP04SC-1, SL23EP04SI-2H), including identical CLKIN, FBK, CLKA1–CLKB2, VDD, and GND assignments-enabling hardware reuse across temperature grades and drive options.
SL23EP04SC-2HT 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-2HT FAQ
1.How can I place an order for SL23EP04SC-2HT through Aetrix?
Please submit a Request for Quotation (RFQ) for SL23EP04SC-2HT 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-2HT reliable?
The price and inventory of SL23EP04SC-2HT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL23EP04SC-2HT is usually 5 days.
3.What payment methods are accepted for SL23EP04SC-2HT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL23EP04SC-2HT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL23EP04SC-2HT?
SL23EP04SC-2HT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL23EP04SC-2HT 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-2HT?
For technical support, including SL23EP04SC-2HT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL23EP04SC-2HT requirements.
6.How does Aetrix verify that SL23EP04SC-2HT is sourced from the original manufacturer or authorized distributors?
All SL23EP04SC-2HT 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-2HT meets industry standards.
7.What is the process for return or replacement of SL23EP04SC-2HT?
All SL23EP04SC-2HT units undergo pre-shipment inspection (PSI). If there is an issue with SL23EP04SC-2HT, 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-2HT part is unused and in its original packaging.
Return procedure for SL23EP04SC-2HT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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