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Texas Instruments LMK04102SQ/NOPB
- Part No.:
- LMK04102SQ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LMK04102SQ/NOPB.pdf
- Description:
- IC CLOCK COND W/PLL 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,518
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Product details
Overview
LMK04102SQ/NOPB from Texas Instruments is a precision clock jitter cleaner IC featuring cascaded PLLatinum™ PLL architecture with two independent phase-locked loops (PLL1 and PLL2), integrated 1600–1750 MHz VCO, and five low-jitter clock outputs supporting LVPECL/LVDS/LVCMOS formats. It operates from 3.15 V to 3.45 V across –40 °C to +85 °C and enables high-speed A/D clocking, SONET/SDH line cards, and multi-band basestation timing.
For engineers reviewing the LMK04102SQ/NOPB datasheet, LMK04102SQ/NOPB pinout, LMK04102SQ/NOPB application, or LMK04102SQ/NOPB equivalent, key selection criteria include its dual-PLL jitter cleaning capability, 1080 MHz maximum output frequency, programmable output format per channel, redundant reference inputs with loss-of-signal detection, and MICROWIRE (SPI) interface for configuration.
Technical Context
The LMK04102SQ/NOPB implements a cascaded PLL architecture where PLL1 accepts dual redundant reference inputs (CLKin0/CLKin1) up to 400 MHz and conditions them before feeding into PLL2, which uses an internal VCO (1600–1750 MHz) and supports external VCXO or crystal input via OSCin/OSCin*. PLL2's phase detector operates up to 100 MHz with programmable charge pump gain.
Five dedicated channel divider blocks enable independent frequency synthesis on each of the five outputs (CLKout0–CLKout4), supporting common telecom/datacom frequencies including 122.88 MHz, 156.25 MHz, 311.04 MHz, and 622.08 MHz. Output formats are configurable per channel: CLKout0/CLKout4 support LVDS/LVPECL; CLKout1/CLKout2 support LVPECL/LVCMOS; CLKout3 supports LVPECL only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCO Range | 1600–1750 MHz - defines synthesizable output spectrum and sets minimum/maximum divider ratios for target frequencies. |
| Max Output Frequency | 1080 MHz - supports high-speed serial interfaces like 10G Fibre Channel and XGMII without external multiplication. |
| Jitter (RMS, 12 kHz–20 MHz) | 150 fs @ 122.88 MHz LVCMOS - enables precise sampling in high-resolution ADCs and SERDES PHYs. |
| Supply Voltage | 3.15–3.45 V - tight regulation required; multiple dedicated power domains (VCC1–VCC14) isolate analog/digital/VCO sections. |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and telecom infrastructure environments including outdoor basestations. |
| Reference Inputs | Dual AC/DC-coupled CLKin0/CLKin1 + differential OSCin/OSCin* - enables failover clocking and flexible oscillator sourcing (VCXO or crystal). |
| Interface | MICROWIRE (3-wire SPI) - allows full register configuration including PLL dividers, output formats, and LOS thresholds. |
Pinout & Package
LMK04102SQ/NOPB is housed in a 48-pin WQFN package (7.0 × 7.0 × 0.8 mm) with exposed die attach pad (DAP) connected to GND for thermal management. Pin assignments follow TI's standardized layout for the LMK041xx family, with dedicated power rails per functional block and differential I/O pairs routed for signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKin0 / CLKin0* | Primary reference input pair for PLL1 | Differential or single-ended AC/DC-coupled clock input; supports auto/manual switching and loss-of-signal detection. |
| OSCin / OSCin* | Reference input for PLL2 VCO | Differential input for external VCXO or crystal; includes optional ×2 frequency doubler (EN_PLL2_REF2X bit). |
| CLKout0 / CLKout0* | Channel 0 clock output | LVDS or LVPECL format; 1080 MHz capable; used for primary system clock distribution. |
| CLKout1 / CLKout1* | Channel 1 clock output | LVPECL or LVCMOS format; independently programmable divider; supports 250 MHz LVCMOS or 1080 MHz LVPECL. |
| GOE | Global output enable | CMOS-level active-low control to disable all clock outputs simultaneously for power sequencing or fault isolation. |
| SYNC* | Output synchronization trigger | Asynchronous edge-triggered signal that aligns phase of all enabled outputs on next rising edge. |
| LD | Lock detect output | CMOS-level indicator showing combined lock status of PLL1 and PLL2; critical for system boot validation. |
| CLKuWire / DATAuWire / LEuWire | MICROWIRE programming interface | 3-wire serial interface for configuring registers; requires slew rate ≥30 V/µs to avoid phase noise degradation during programming. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded PLL architecture | Enables ultra-low jitter cleanup: first PLL suppresses reference noise; second PLL with high-frequency VCO achieves fine resolution and low close-in phase noise. |
| Redundant reference inputs | Supports seamless switchover between CLKin0 and CLKin1 with automatic LOS detection-essential for carrier-grade 99.999% uptime systems. |
| Per-channel output formatting | Each of five outputs can be independently set to LVPECL, LVDS, or LVCMOS-eliminates need for external level translators in mixed-interface designs. |
| Programmable VCO divider & output dividers | Allows exact synthesis of telecom standards (e.g., 311.04 MHz for SONET OC-48) without external dividers or custom firmware. |
| Integrated loop filter components | Reduces external BOM count: only passive R/C network needed on CPout1/CPout2 pins-simplifies layout and improves repeatability. |
Applications
| Multi-Carrier Basestation | SONET/SDH Line Card |
|---|---|
Use Scenario: Synchronizing RF transceivers across 2G/3G/4G bands with strict phase alignment and low wander requirements. IC Role / Device Role / Timing Role: Jitter cleaner providing five synchronized clocks for DACs, ADCs, and digital front-end FPGAs. Use Value: Achieves <150 fs RMS jitter at 122.88 MHz, meeting ITU-T G.8262 ePRTC Class C mask for baseband processing. | Use Scenario: Generating line-rate clocks (155.52 MHz, 622.08 MHz, 2488.32 MHz) for OC-48/OC-192/OC-768 framer and mapper ICs. IC Role / Device Role / Timing Role: Dual-PLL frequency synthesizer deriving all required rates from a single 25 MHz OCXO reference. Use Value: Eliminates discrete VCXO modules and reduces board area by 40% versus legacy jitter cleaners with external filters. |
| High-Speed A/D Clocking | Broadcast Video Distribution |
Use Scenario: Driving 16-bit, 250 MSPS ADCs in radar and test equipment requiring sub-0.1 LSB aperture jitter. IC Role / Device Role / Timing Role: Low-phase-noise clock source with 1080 MHz LVPECL output directly interfacing ADC sampling inputs. Use Value: Delivers 150 fs integrated jitter (12 kHz–20 MHz), enabling ENOB >14.2 bits at full scale without external jitter attenuation. | Use Scenario: Distributing genlock and pixel clocks across SMPTE 2110 IP video routers with deterministic latency and skew control. IC Role / Device Role / Timing Role: Multi-format clock generator supplying 74.25 MHz (HD), 148.5 MHz (3G-SDI), and 297 MHz (12G-SDI) simultaneously. Use Value: Per-output format selection (LVDS for backplane, LVCMOS for FPGA logic) avoids level-shifter ICs and reduces signal integrity risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock jitter cleaning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMK04110SQ/NOPB | Same cascaded PLL architecture but wider VCO range (1185–1296 MHz); supports five LVPECL outputs (no LVCMOS/LVDS mix). | Better suited for lower-frequency applications (<300 MHz) requiring uniform LVPECL fanout, not mixed-signal systems needing LVCMOS for logic clocks. | Select when system uses only LVPECL loads and prioritizes lower VCO phase noise over multi-format flexibility. |
| LMK04806BISQE/NOPB | Successor device with higher integration: includes integrated LDOs, enhanced jitter performance (90 fs typical), and JESD204B SYSREF support. | Targeted at JESD204B-compliant data converters and 5G massive MIMO systems requiring deterministic delay calibration. | Choose for new designs requiring JESD204B compliance or sub-100 fs jitter; LMK04102SQ/NOPB remains optimal for cost-sensitive industrial deployments. |
Compared with LMK04110SQ/NOPB, LMK04102SQ/NOPB offers higher VCO frequency and mixed-output formatting essential for heterogeneous clock domains; versus LMK04806BISQE/NOPB, it lacks JESD204B features but provides proven reliability and broader temperature qualification for legacy infrastructure.
Availability
LMK04102SQ/NOPB is available at Aetrix Electronics and suitable for multi-carrier basestations, SONET/SDH line cards, and high-speed A/D clocking requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LMK04102SQ/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and clock solutions for industrial, automotive, and communications markets.
The LMK041xx family was designed specifically for telecom infrastructure and high-performance instrumentation requiring ultra-low jitter, dual-PLL redundancy, and flexible clock distribution without external VCXOs.
FAQ
What is the VCO tuning range of the LMK04102SQ/NOPB?
The LMK04102SQ/NOPB integrates a voltage-controlled oscillator with a specified tuning range of 1600 MHz to 1750 MHz. This range is fixed per device variant and enables synthesis of output frequencies up to 1080 MHz using integer-N and fractional-N division schemes within PLL2. The VCO operates under closed-loop control with fine tuning sensitivity of 9–14 MHz/V depending on operating point.
Does the LMK04102SQ/NOPB support both differential and single-ended reference inputs?
Yes, the LMK04102SQ/NOPB supports both differential and single-ended configurations on all reference inputs. CLKin0/CLKin1 and OSCin/OSCin* accept AC- or DC-coupled signals; single-ended mode requires grounding the complementary pin. Input voltage swing ranges (e.g., 0.25–2.0 Vpp for single-ended CLKin) and slew rate minimums (0.15 V/ns) are explicitly defined in the datasheet to ensure jitter performance.
How many clock outputs does the LMK04102SQ/NOPB provide, and what formats are supported?
The LMK04102SQ/NOPB provides five fully independent clock outputs (CLKout0 through CLKout4). Each output supports programmable format: CLKout0 and CLKout4 support LVDS or LVPECL; CLKout1 and CLKout2 support LVPECL or LVCMOS; CLKout3 supports LVPECL only. Format selection is register-configurable and does not require hardware changes.
Can the LMK04102SQ/NOPB operate without an external VCXO?
Yes, the LMK04102SQ/NOPB can operate using a low-cost parallel-resonant crystal (6–20 MHz) connected to the OSCin/OSCin* pins. The device includes integrated crystal load capacitance and bias circuitry, eliminating need for external capacitors in most cases. Crystal ESR must be ≤100 Ω, and power dissipation is limited to 200 µW to prevent aging or frequency drift.
What is the purpose of the SYNC* pin on the LMK04102SQ/NOPB?
The SYNC* pin on the LMK04102SQ/NOPB is an asynchronous, active-low input that triggers simultaneous phase alignment of all enabled clock outputs (CLKout0–CLKout4) on the next rising edge of their respective divided clocks. This ensures deterministic inter-channel skew and is critical for time-sensitive applications like JESD204B subclass 1 or multi-chip ADC synchronization.
LMK04102SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- PLLatinum™
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes
- Input:
- LVCMOS, LVDS, LVPECL
- Output:
- LVCMOS, 2VPECL, LVPECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:7
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 1.08GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.15V ~ 3.45V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-WQFN (7x7)
LMK04102SQ/NOPB FAQ
1.How can I place an order for LMK04102SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK04102SQ/NOPB 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 LMK04102SQ/NOPB reliable?
The price and inventory of LMK04102SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK04102SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMK04102SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK04102SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK04102SQ/NOPB?
LMK04102SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK04102SQ/NOPB 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 LMK04102SQ/NOPB?
For technical support, including LMK04102SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK04102SQ/NOPB requirements.
6.How does Aetrix verify that LMK04102SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMK04102SQ/NOPB 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 LMK04102SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMK04102SQ/NOPB?
All LMK04102SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMK04102SQ/NOPB, 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 LMK04102SQ/NOPB part is unused and in its original packaging.
Return procedure for LMK04102SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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