company blog about Mingjiada Supply/Recycle TI LMK3H2108A01RKPR 400MHz Low Jitter BAW Clock Generators

Mingjiada Supply/Recycle TI LMK3H2108A01RKPR 400MHz Low Jitter BAW Clock Generators

I. Product Overview
The LMK3H2108A01RKPR is an 8-output ultra-low-jitter clock generator/buffer based on bulk acoustic wave (BAW) resonator technology, launched by Texas Instruments (TI). Housed in a 40-VQFN (5x5) package, this device is classified as an application-specific clock/timing integrated circuit.
The LMK3H2108A01RKPR provides up to 8 differential outputs or 16 LVCMOS outputs. It features 3 clock inputs, which offer clock multiplexing and buffering functions. Each output group can be independently configured to use any clock source.
The LMK3H2108A01RKPR is suitable for a wide range of applications, including servers, data centres, telecommunications equipment and high-speed industrial links.

II. Summary of Specifications
Model: LMK3H2108A01RKPR
Package: 40-VQFN (5x5)
Primary Application: PCI Express (PCIe)
Inputs: Clocks, 3; Outputs: 8
Output Formats: LP-HCSL, LVCMOS, LVDS
Frequency – Maximum: 400 MHz
Supply Voltage: 1.71 V–1.89 V / 2.375 V–2.625 V / 3.135 V–3.465 V
Operating Temperature: -40°C to 85°C (TA)
Integrated BAW Technology: The chip incorporates an integrated BAW resonator, eliminating the need for an external crystal (XTAL) or oscillator (XO), which significantly simplifies PCB design, reduces BOM costs and minimises external noise coupling.
Extremely low jitter performance: Complies with PCIe Gen 1 to Gen 7 standards, with typical RMS jitter below 30 fs (Gen 4); maximum jitter limits are 61 fs (Gen 5), 36.4 fs (Gen 6) and 25.5 fs (Gen 7, with SSC).
Flexible outputs and power supply: Supports 8 differential channels (LP-HCSL/LVDS, etc.) or 16 LVCMOS outputs, with a maximum output frequency of 400 MHz; VDD and VDDO pins can be independently configured to 1.8 V, 2.5 V or 3.3 V.

III. Key Features of the LMK3H2108A01RKPR:
Integrated BAW resonator, eliminating the need for an external reference clock
The LMK3H2108A01RKPR integrates a bulk acoustic wave (BAW) resonator, eliminating the need for an external crystal (XTAL) or oscillator (XO). This design not only significantly reduces BOM costs and PCB area but also effectively mitigates the impact of parasitic capacitance on frequency accuracy.
Flexible Output Configuration
8 differential outputs (LP-HCSL format, programmable swing), compatible with high-speed interfaces such as PCIe
16 LVCMOS outputs (selectable levels: 1.2V, 1.8V, 2.5V or 3.3V)
Supports DC/AC coupling to suit different application scenarios
High-Performance Clock Generation
2 fractional-output dividers (FODs), supporting synthesis at any frequency
Output frequencies up to 400 MHz
Supports PCIe Gen1 to Gen7 jitter specifications, meeting the clock accuracy requirements for high-speed serial communication
Ultra-low jitter: PCIe Gen4 < 30 fs RMS, PCIe Gen5 < 50 fs RMS
Multiple Inputs and Clock Redundancy
3 clock inputs (IN0/IN1/IN2), supporting differential or single-ended inputs
Configurable as a clock multiplexer, providing clock redundancy and buffering functions
Flexible Power Supply and Low Power Consumption
Core supply voltage: 1.8V/2.5V/3.3V selectable
Independently adjustable output supply voltages
Typical power consumption: 300 mW (8 x 100 MHz differential outputs, 2.5 V supply)
High reliability
Operating temperature range: –40 °C to +105 °C, suitable for industrial environments
Start-up time: ≤5 ms, rapid power-up stabilisation
Fail-safe input pins, which can be pulled high when the device is powered down

IV. Main Application Areas (LMK3H2108A01RKPR)
Servers/Storage: CPU, PCIe slots, NVMe, retimer reference clocks
Communications Equipment: FPGA/ASIC master clocks, 400 GbE switch backplanes
Data Centres: High-performance computing server motherboards, NICs, SmartNICs, hardware accelerators
Industrial Testing: High-speed data acquisition boards, ADC/DAC clock distribution

Mingjiada Electronics has long been supplying and recycling Texas Instruments (TI) clock generators, including the LMK3H2108A01RKPR, covering the full range of products from industrial-grade to automotive-grade (Q1). Models include clock generators with integrated BAW resonators, such as the LMK3H2108, LMK3H2104 and LMK3H0102, which are specifically designed for AI servers, data centres and automotive ADAS applications.

For further information regarding the [TI] LMK3H2108A01RKPR clock generator, to request samples or enquire about buy-back prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply and demand details.