1 Features
• Integrated BAW resonator, no need for external
reference
• Flexible frequency generation:
– Two channel dividers: up to three unique output
frequencies from 2.5MHz to 400MHz
– LVCMOS outputs supported up to 200MHz:
1.8V, 2.5V, or 3.3V
– Combination of AC-LVDS, DC-LVDS, LP-HCSL,
and LVCMOS on OUT0 and OUT1 pins
– Additional LVCMOS output for generation of up
to 5 LVCMOS clocks
• Total output frequency stability: ±25ppm
• 2 functional modes: I2C or preprogrammed OTP
– Fully configurable I2C address
• PCIe Gen 1 to Gen 7 compliant: Common Clock
with or without SSC, SRNS, and SRIS
• Very low PCIe jitter with SSC:
– PCIe Gen 3 Common Clock jitter: 135.3fs
maximum (PCIe limit is 1ps)
– PCIe Gen 4 Common Clock jitter: 135.3fs
maximum (PCIe limit is 500fs)
– PCIe Gen 5 Common Clock jitter: 57.5fs
maximum (PCIe limit is 150fs)
– PCIe Gen 6 Common Clock jitter: 34.5fs
maximum (PCIe limit is 100fs)
– PCIe Gen 7 Common Clock jitter: 29.6fs
maximum (PCIe limit is 67fs)
• Programmable SSC modulation depth
– Preprogrammed: –0.1%, –0.25%, –0.3%,
and –0.5% down spread at 200MHz FOD
frequency
– Register programmable: –0.1% to –3% down
spread or ±0.05% to ±1.5% center spread
• 1.8V to 3.3V supply voltage
• Internal LDOs with –93.1dBc PSNR at 500kHz
switching noise for LP-HCSL outputs
• Start-up time: <1.5ms
• Output-to-output skew: <50ps
• Fail-safe digital input pins

2 Applications
• PCIe Gen 1 to Gen 7 clock generation
• Server Motherboard
• NIC, SmartNIC
• Hardware Accelerator
• Multifunction Printer
• PCIe SSD
• Add-In Card, PCIe Expansion Card

3 Description
The LMK3H0102 is a 2-output PCIe Gen 1 to
Gen 7 compliant reference-less clock generator
with Spread Spectrum Clocking (SSC) support.
The part is based on TI proprietary Bulk Acoustic
Wave (BAW) technology and provides ±25ppm
clock outputs without any crystal or external clock
reference. The device can provide two SSC clocks,
two non-SSC clocks, or one SSC clock and one
non-SSC clock at the same time. The device
meets the full PCIe compliance from Gen 1 to
Gen 7, including Common Clock with or without
SSC, Separate Reference No Spread (SRNS), and
Separate Reference Independent Spread (SRIS).
The device can be easily configured through either
pins or I2C interface. An external DC/DC can be
used to power the device. Refer to Power Supply
Recommendations for detailed guidelines on power
supply filtering and sourcing from DC/DC.
For OTP default settings for each LMK3H0102Axxx
configuration, refer to the LMK3H0102 Configuration
Guide.