Specifications
| Type | Description |
|---|---|
| Part Number | LMK6H |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Output Type | HCSL |
| Supported Output Frequency Range | 1 MHz to 400 MHz |
| RMS Jitter | 100 fs typ, 125 fs max at 156.25 MHz, 12 kHz to 20 MHz integration bandwidth |
| PCIe Compliance | PCIe Gen 1 to Gen 7 compliant for reference clock use |
| Total Frequency Stability | ±25 ppm inclusive of 10 years aging and all other factors |
| Operating Ambient Temperature | -40°C to 85°C for LMK6H differential output variant |
| Power Supply Noise Immunity | -72 dBc PSRR with 500 kHz ripple and integrated LDO |
| Start-up Time | <5 ms |
| Standard Differential Frequencies | 25, 26, 32.5, 50, 51.84, 54, 65, 76.8, 80, 100, 108, 122.88, 125, 133.330, 148.35, 148.5, 150, 155.52, 156.25, 161.1328125, 200, 312.5, 400 MHz |
| Custom Frequency Support | Any frequency between 1 MHz and 400 MHz; contact TI representative for custom frequency and samples |
| Package Size DLE | 3.2 mm x 2.5 mm, 6-pin VSON DLE package |
| Package Size DLF | 2.5 mm x 2.0 mm, 6-pin VSON DLF package |
| Supply Voltage Ordering Option A | 2.5 V to 3.3 V ±5%, -40°C to 85°C |
| Supply Voltage Ordering Option B | 1.8 V ±15%, -40°C to 85°C |
| Pin 1 Function Options | Output Enable active high, Standby active low, or No Connect |
| Pin 2 Function Options | Output Enable active high, Standby active low, or No Connect |
| Packaging Method Options | Small reel or large reel, ordering suffix T or R |
| Pin Count | 6 pins |
| Pin 3 Function | GND, device ground |
| Pin 4 Function | OUTP, positive differential output clock |
| Pin 5 Function | OUTN, negative differential output clock |
| Pin 6 Function | VDD, device power supply |
| Absolute Maximum Supply Voltage, 2.5 V/3.3 V Devices | -0.3 V to 3.63 V |
| Absolute Maximum Supply Voltage, 1.8 V Devices | -0.3 V to 1.98 V |
| Absolute Maximum EN Logic Input Voltage | -0.3 V to VDD + 0.3 V over operating free-air temperature range |
| Absolute Maximum Differential Clock Output Voltage | -0.3 V to VDD + 0.3 V for OUTP and OUTN |
| Maximum Junction Temperature | 125°C |
| Storage Temperature | 150°C max |
| ESD Human Body Model | ±2000 V, ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Charged Device Model | ±500 V, JEDEC JS-002, all pins |
| Mechanical Shock Resistance | 1500 g, MIL-STD-883F, Method 2002, Condition A |
| Mechanical Vibration Resistance, Method 2026 | 10 g, MIL-STD-883F, Method 2026, Condition C |
| Mechanical Vibration Resistance, Method 2007 | 20 g, MIL-STD-883F, Method 2007, Condition A |
| Moisture Sensitivity Level | MSL1 |
| Recommended Supply Voltage, 1.8 V Devices | 1.7 V min, 1.8 V nom, 1.9 V max |
| Recommended Supply Voltage, 2.5 V/3.3 V Devices | 2.37 V min, 2.5 V or 3.3 V nom, 3.5 V max |
| Recommended Ambient Temperature | -40°C to 85°C for differential outputs LMK6D, LMK6H, and LMK6P |
| Recommended Junction Temperature | 125°C max |
| VDD Power-Up Ramp Time | 0.1 ms min, 100 ms max |
| Junction-to-Ambient Thermal Resistance, DLE | 101.2°C/W |
| Junction-to-Ambient Thermal Resistance, DLF | 107.9°C/W |
| Junction-to-Case Top Thermal Resistance, DLE | 58.6°C/W |
| Junction-to-Case Top Thermal Resistance, DLF | 70.1°C/W |
| Junction-to-Board Thermal Resistance, DLE | 31.3°C/W |
| Junction-to-Board Thermal Resistance, DLF | 39.4°C/W |
| Junction-to-Top Characterization Parameter, DLE | 2.7°C/W |
| Junction-to-Top Characterization Parameter, DLF | 2.3°C/W |
| Junction-to-Board Characterization Parameter, DLE | 31.1°C/W |
| Junction-to-Board Characterization Parameter, DLF | 39.2°C/W |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments LMK6H is a BAW fixed-frequency oscillator in the Signal_Chain category. The LMK6H variant provides HCSL output over a supported range of 1 MHz to 400 MHz, with standard differential frequencies including 25, 100, 156.25, 200, 312.5, and 400 MHz. TI also supports custom frequencies between 1 MHz and 400 MHz through representative contact.
For clocking applications, the device is specified for PCIe Gen 1 to Gen 7 reference clock use. At 156.25 MHz with 12 kHz to 20 MHz integration bandwidth, RMS jitter is 100 fs typical and 125 fs maximum. Total frequency stability is ±25 ppm inclusive of 10 years aging and all other factors.
LMK6H uses a 6-pin VSON package with DLE and DLF size options. Pins include configurable Pin 1 and Pin 2 functions, GND, OUTP, OUTN, and VDD. Supply options cover 1.8 V ±15% and 2.5 V to 3.3 V ±5%, with -40°C to 85°C ambient operation.
Key Features
- HCSL output for LMK6H differential clocking
- 1 MHz to 400 MHz supported output range
- 100 fs typical RMS jitter at 156.25 MHz
- PCIe Gen 1 to Gen 7 reference clock compliance
- ±25 ppm total frequency stability including 10 years aging
- -40°C to 85°C ambient operating range
- -72 dBc PSRR with 500 kHz supply ripple
- Startup time under 5 ms
- 1.8 V, 2.5 V, and 3.3 V supply options
- 6-pin VSON DLE and DLF package options
Typical Applications
- PCIe reference clocks
- HCSL differential clock outputs
- Fixed-frequency oscillator designs
- 1 MHz to 400 MHz clock generation
- 156.25 MHz low-jitter clocking
- Compact 6-pin VSON assemblies
- Custom-frequency oscillator sourcing
Procurement Notes
When requesting a quote for LMK6H, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What output type does the LMK6H provide?
The LMK6H variant provides an HCSL output. Its supported HCSL output frequency range is 1 MHz to 400 MHz, with standard differential frequency options and custom frequency support across that range through Texas Instruments.
What jitter is specified for LMK6H?
For LMK6H at 156.25 MHz, RMS jitter is specified as 100 fs typical and 125 fs maximum using a 12 kHz to 20 MHz integration bandwidth.
Which packages are listed for LMK6H?
LMK6H is listed in 6-pin VSON package options. The DLE package size is 3.2 mm x 2.5 mm, and the DLF package size is 2.5 mm x 2.0 mm.
What supply voltage options are available?
Ordering option A supports 2.5 V to 3.3 V ±5% over -40°C to 85°C. Ordering option B supports 1.8 V ±15% over the same ambient temperature range.
Is LMK6H suitable for PCIe reference clock use?
The extracted datasheet facts list LMK6H as PCIe Gen 1 to Gen 7 compliant for reference clock use, with HCSL output and 1 MHz to 400 MHz supported output frequency range.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 21, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.