LMK04033BISQ/NOPB Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
The LMK04033BISQ/NOPB from Texas Instruments is a PLL-based clock driver with differential MUX input conditioning and 10pF load capacitance in a 48-pin QFN package. It targets precision clock distribution in communications, test equipment, and FPGA-based systems. Available worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 48
- Lifecycle
- ACTIVE
- Datasheet
- LMK04033BISQ/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $14.7800(MOQ 500)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LMK04033BISQ/NOPB?
- Differential MUX input conditioning enables seamless clock source selection and redundancy in high-reliability communications systems
- PLL-based architecture provides low-jitter clock multiplication and distribution to multiple outputs from a single reference
- 48-pin QFN package with 10pF output load capacitance supports compact high-density clock distribution layouts
What is LMK04033BISQ/NOPB used for?
The LMK04033BISQ/NOPB is designed for precision clock distribution in high-speed communications systems, wireless base stations, and FPGA-based data acquisition boards requiring synchronized, low-jitter clocks across multiple ICs. Its differential MUX input allows switching between redundant reference sources without disrupting downstream logic, making it suitable for fault-tolerant telecom line cards and test-and-measurement instruments. The device also serves industrial and medical imaging systems where multi-output clock synchronization is critical for ADC and DAC sample-rate alignment.
What are the specifications of LMK04033BISQ/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | 4000/14000/40000 |
| Input Conditioning | DIFFERENTIAL MUX |
| JESD-30 Code | S-XQCC-N48 |
| JESD-609 Code | e3 |
| Load Capacitance (CL) | 10pF |
| Logic IC Type | PLL BASED CLOCK DRIVER |
| Max I(ol) | 0.0005A |
| Number of Functions | 1 |
| Number of True Outputs | 6 |
| Output Characteristics | 3-STATE |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC48,.27SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 385mA |
| Qualification Status | Not Qualified |
| Same Edge Skew-Max (tskwd) | 0.1ns |
| Supply Voltage-Max (Vsup) | 3.45V |
| Supply Voltage-Min (Vsup) | 3.15V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| fmax-Min | 2160MHz |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LMK04033BISQ/NOPB datasheet?
LMK04033BISQ/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LMK04033BISQ/NOPB?
Compatible alternatives and drop-in replacements for LMK04033BISQ/NOPB:
PLL Based Clock Driver, 4000/14000/40000 Series, 6 True Output(s), 0 Inverted Output(s), BICMOS
PLL Based Clock Driver, 4000/14000/40000 Series, 6 True Output(s), 0 Inverted Output(s), BICMOS
PLL Based Clock Driver, 4000/14000/40000 Series, 6 True Output(s), 0 Inverted Output(s), BICMOS
Frequently Asked Questions
How does the LMK04033BISQ/NOPB differential MUX input improve reliability in a telecom line card?
The differential MUX input allows the LMK04033BISQ/NOPB to switch between two reference clock sources without glitching downstream logic, providing built-in reference redundancy. In a telecom line card with a primary and backup 122.88 MHz reference, this feature keeps the 48-pin QFN device operational even if one reference fails, meeting carrier-grade 99.999% uptime requirements without external switching circuitry.
What output load capacitance is the LMK04033BISQ/NOPB rated for, and how does that affect PCB trace routing?
The device is specified for a 10pF load capacitance per output, which corresponds to a PCB trace of approximately 5 to 10cm on a standard FR4 board with 50-ohm controlled impedance. Keeping trace lengths within this limit ensures that clock signal integrity is maintained with minimal overshoot, making it straightforward to distribute clocks to multiple FPGAs or ADCs placed within 10cm of the LMK04033 on the same board.
In which package does the LMK04033BISQ/NOPB come, and what are the PCB area implications for a dense clock distribution board?
The LMK04033BISQ/NOPB is housed in a 48-pin QFN (XQCC-N48) package with an exposed thermal pad, occupying roughly 7mm x 7mm of PCB area. This compact footprint allows placement near the FPGA fabric it serves, minimizing clock distribution trace length and reducing jitter introduced by long PCB runs in multi-gigabit systems operating above 1 GHz.
When should an engineer choose LMK04033BISQ/NOPB over a simpler single-output clock buffer for an FPGA design?
The LMK04033BISQ/NOPB is the better choice when the FPGA design requires multiple synchronized clock outputs derived from a single PLL reference, or when source switching between a primary and backup reference without holdover glitches is mandatory. A simple clock buffer cannot multiply or clean a noisy reference, whereas the LMK04033's PLL-based architecture can reduce reference jitter and fan out phase-aligned clocks to 2 or more high-speed serial transceivers simultaneously.
Related Guides
STM32H725IGT3 Selection Guide: Memory, Package, Temperature, and Supply
Choose the right STM32H725 variant by comparing Flash, package, pin count, temperature grade, connectivity, and production requirements.
Aug 1, 2026
STM32H725IGT3 High-Performance MCU Design Guide
Design STM32H725IGT3 systems for reliable 550 MHz operation with practical power, clock, cache, DMA, PCB, ADC, and recovery guidance.
Jul 31, 2026
150141VS73100 Violet SMD LED Selection Guide: Color, Drive, and Sourcing
Select the 150141VS73100 by wavelength, brightness, drive current, 3528 fit, reliability, and traceable sourcing requirements.
Jul 31, 2026
STEF05SGR 5 V eFuse Protection Design Guide
Design a reliable 5 V STEF05SGR eFuse stage with current-limit math, capacitor sizing, thermal analysis, fault recovery, and PCB layout guidance.
Jul 30, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $16.6300 | $8315.00 |
| 1000+ | $15.7100 | $15710.00 |
| 10000+ | $14.7800 | $147800.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit