LMK04001BISQE Texas Instruments Integrated Circuit (Other) In Stock
The LMK04001BISQE is a PLL-based clock conditioner with a differential input MUX and 5 low-noise, 3-state clock outputs for multi-board synchronization in communications and test systems. It cleans and distributes reference clocks with ultra-low output jitter in a 48-pin QFN package. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 48
- Lifecycle
- OBSOLETE
- Datasheet
- LMK04001BISQE Datasheet PDF
- Category
- Integrated Circuit
- 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 LMK04001BISQE?
- PLL-based clock conditioning with differential input MUX for seamless reference source switching and holdover in telecom equipment
- 5 independent 3-state clock outputs enabling precise, synchronized distribution to multiple FPGA, DSP, and ADC clock inputs
- Ultra-low output jitter performance in a 48-pin QFN package, meeting GR-1244-CORE and IEEE 1588 reference clock requirements
What is LMK04001BISQE used for?
The LMK04001BISQE is designed for high-performance synchronization in telecommunications line cards, test and measurement instruments, and software-defined radio platforms that require clean, low-jitter reference clocks distributed to multiple ICs simultaneously. Its differential input multiplexer allows hitless switching between a primary and backup reference, supporting redundant clock architectures in carrier-grade equipment. The 5 independent 3-state outputs can drive FPGA, ADC, and DAC clock inputs across a board without additional clock buffer ICs, simplifying the clock distribution network.
What are the specifications of LMK04001BISQE?
| YTEOL | 0 |
| Family | 4000/14000/40000 |
| Input Conditioning | DIFFERENTIAL MUX |
| JESD-30 Code | S-XQCC-N48 |
| JESD-609 Code | e0 |
| Logic IC Type | PLL BASED CLOCK DRIVER |
| Max I(ol) | 0.0005A |
| Number of Functions | 1 |
| Number of True Outputs | 5 |
| 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 |
| Peak Reflow Temperature (Cel) | 235 |
| Power Supply Current-Max (ICC) | 435mA |
| 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 | Tin/Lead (Sn85Pb15) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| HTS Code | 8542.39.00.60 |
Where can I find the LMK04001BISQE datasheet?
LMK04001BISQE Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LMK04001BISQE?
Compatible alternatives and drop-in replacements for LMK04001BISQE:
PLL Based Clock Driver, 4000/14000/40000 Series, 5 True Output(s), 0 Inverted Output(s), BICMOS
PLL Based Clock Driver, 4000/14000/40000 Series, 5 True Output(s), 0 Inverted Output(s), BICMOS
PLL Based Clock Driver, 4000/14000/40000 Series, 7 True Output(s), 0 Inverted Output(s), BICMOS
PLL Based Clock Driver, 4000/14000/40000 Series, 7 True Output(s), 0 Inverted Output(s), BICMOS
Frequently Asked Questions
How many clock outputs does the LMK04001BISQE provide, and what logic standard do they use?
The LMK04001BISQE provides 5 independent clock outputs with 3-state capability, allowing each output to be tri-stated independently for power saving or bus-sharing configurations. The outputs are designed for low-voltage differential signaling compatible with LVDS receivers commonly found on FPGAs, ADCs, and DSPs operating at clock frequencies from DC to several hundred MHz, depending on the PLL loop bandwidth configuration.
What input reference sources does the LMK04001BISQE support, and how does its differential MUX help with redundancy?
The device includes a differential input multiplexer that accepts 2 reference clock inputs and switches between them under software control or automatic holdover logic. In telecom applications requiring 99.999% uptime, this allows seamless failover from a primary GPS-derived 10 MHz reference to a backup SONET/SDH reference without glitch, maintaining sub-nanosecond output phase continuity during the switchover event.
For a 48-pin QFN package like the LMK04001BISQE, what PCB design considerations apply to achieve the specified jitter performance?
The 48-pin QFN body measures 7 mm × 7 mm with 0.5 mm lead pitch, requiring a power-supply decoupling strategy with at least one 100 nF capacitor per VDD pin placed within 0.5 mm of each supply pad. For minimum PLL jitter, the VCO supply should be filtered with a 10 µH inductor plus 10 µF bulk capacitor, isolating it from digital switching noise. Differential output trace length matching to within 50 µm and a ground-referenced return path beneath the QFN thermal pad are also critical.
How does the LMK04001BISQE compare to a simple crystal oscillator for distributing a reference clock to 5 ADCs in a high-speed data acquisition system?
A crystal oscillator provides a single output and cannot clean jitter from an external reference, so distributing it to 5 ADCs requires 4 additional clock buffer ICs, adding BOM cost and board area. The LMK04001BISQE's PLL loop filter attenuates input reference phase noise above the loop bandwidth, outputting a cleaner clock with additive jitter typically below 100 fs RMS, and its 5 native outputs eliminate the buffer chain, reducing total clock distribution power by 30% to 50% in a 10 MHz to 200 MHz reference system.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 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
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