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LMK04010BISQ/NOPB
Texas Instruments
IC CLOCK COND 48WQFN
2745 Pcs New Original In Stock
Clock Conditioner IC 1.296GHz 1 48-WFQFN Exposed Pad
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5.0 / 5.0
- (64 Ratings)
LMK04010BISQ/NOPB
Product Overview
1298952
DiGi Electronics Part Number
LMK04010BISQ/NOPB-DGManufacturer
Texas Instruments
LMK04010BISQ/NOPB
Description
IC CLOCK COND 48WQFNInventory
2745 Pcs New Original In Stock
Clock Conditioner IC 1.296GHz 1 48-WFQFN Exposed Pad
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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LMK04010BISQ/NOPB Technical Specifications
Category
Clock/Timing, Clock Generators, PLLs, Frequency Synthesizers
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Type
Clock Conditioner
PLL
Yes
Input
LVCMOS, LVDS, LVPECL
Output
2VPECL, LVPECL
Number of Circuits
1
Ratio - Input:Output
2:5
Differential - Input:Output
Yes/Yes
Frequency - Max
1.296GHz
Divider/Multiplier
Yes/Yes
Voltage - Supply
3.15V ~ 3.45V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-WFQFN Exposed Pad
Supplier Device Package
48-WQFN (7x7)
Base Product Number
LMK04010
Datasheet & Documents
HTML Datasheet
LMK04010BISQ/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LMK04010BISQ-DG
2156-LMK04010BISQ/NOPB
TEXTISLMK04010BISQ/NOPB
LMK04010BISQ
Standard Package
1,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Super efficient delivery system and helpful support team make all the difference.
грудня 02, 2025
The thoughtful, eco-conscious packaging showed how much they care about the environment.
грудня 02, 2025
Their affordable pricing makes high-quality technology accessible to all.
грудня 02, 2025
DiGi Electronics' combination of rapid dispatch and durable products keeps my operations running smoothly.
грудня 02, 2025
DiGi Electronics' proactive after-sales team ensures we remain satisfied with their service.
грудня 02, 2025
The speed of delivery was remarkable, and the packaging was thoughtfully designed.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the LMK04010BISQ/NOPB in a mixed-signal PCB environment with high-speed ADCs?
When integrating the LMK04010BISQ/NOPB in mixed-signal systems with high-speed ADCs, phase noise and power supply noise coupling are critical risks. The LMK04010BISQ/NOPB’s ultra-low jitter performance (sub-100 fs typical) can be degraded by inadequate power rail filtering or poor layout. To mitigate, use separate low-noise LDOs for AVDD/DVDD rails, implement split ground planes with controlled stitching, and place the LMK04010BISQ/NOPB close to the ADC clock input. Avoid routing digital signals under the device due to its exposed pad, which is connected to ground and sensitive to EMI. Proper decoupling with 100nF and 10μF capacitors at each supply pin is essential to maintain signal integrity at output frequencies up to 1.296GHz.
How does the LMK04010BISQ/NOPB compare to the LMK04832 in terms of clock redundancy and failover support for telecom applications?
The LMK04010BISQ/NOPB supports dual-input clock sourcing with automatic switch-over, making it suitable for telecom systems requiring holdover or redundancy, but it lacks integrated jitter attenuation compared to the LMK04832. While the LMK04010BISQ/NOPB offers excellent frequency flexibility and low additive phase noise, the LMK04832 provides superior jitter cleaning via dual-stage PLL architecture. If your application uses a noisy reference (e.g., from a network packet timing source), the LMK04832 may be preferable. However, for clean reference distribution with minimal latency and deterministic skew, the LMK04010BISQ/NOPB is more suitable due to its direct pass-through mode and precise divider control.
Can the LMK04010BISQ/NOPB reliably drive 2VPECL signals over long traces, and what are the impedance and termination best practices?
The LMK04010BISQ/NOPB can drive 2VPECL outputs up to 1.296GHz, but trace length and termination are critical for signal integrity. For traces exceeding 2 inches, use controlled-impedance microstrips (100Ω differential) and terminate at the receiver with 100Ω resistors to VTT (typically VCC - 2V). Avoid unterminated stubs or excessive vias. Use AC coupling with 0.1μF capacitors close to the output pins to block DC offset. For longer runs (>6 inches), consider adding a redriver or selecting a higher-drive buffer, as the LMK04010BISQ/NOPB output swing may degrade, leading to timing uncertainty or EMI issues due to reflections.
What are the reliability concerns with the LMK04010BISQ/NOPB in industrial environments operating near 85°C ambient temperature?
At 85°C ambient, thermal management becomes critical for the LMK04010BISQ/NOPB in 48-WQFN package. The exposed pad must be soldered to a sufficient copper pour (via array to inner ground planes) to keep junction temperature below 125°C. Monitor power dissipation—especially when driving multiple 2VPECL/LVPECL outputs—as each output stage can dissipate ~50mW. Poor thermal design can accelerate aging or cause thermal shutdown. Additionally, ensure humidity control during assembly (MSL3 rating); avoid prolonged exposure to >30°C/60% RH before reflow to prevent popcorning. For field reliability, derate total supply current by 20% and verify stable PLL lock across temperature cycles.
Is the LMK04010BISQ/NOPB a drop-in replacement for the Si5324 in legacy timing architectures, and what interface compatibility issues should be considered?
The LMK04010BISQ/NOPB is not a direct drop-in replacement for the Si5324, despite similar roles in clock conditioning. Key differences include input compatibility—Si5324 accepts CML/CMOS/LVDS, while LMK04010BISQ/NOPB requires LVCMOS/LVDS/LVPECL with different threshold levels—and output drive (2VPECL vs. Si5324's LVDS). The I²C control interface on the LMK04010BISQ/NOPB requires firmware adaptation for register maps and initialization sequences. Additionally, the Si5324 includes integrated crystal oscillator support, whereas the LMK04010BISQ/NOPB requires an external reference. Designers must revise power sequencing, loop filter components if using PLL, and validate jitter transfer bandwidth to ensure timing sync compliance in applications like OTN or SyncE.
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LMK04010BISQ/NOPB CAD Models
Texas Instruments LMK04010BISQ/NOPB PCB symbols & footprints
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