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LMK3H0102
  • LMK3H0102
  • LMK3H0102

LMK3H0102

ACTIVE

Bulk acoustic wave (BAW)-based PCIe Gen 1 to Gen 7-compliant referenceless clock generator

Texas Instruments LMK3H0102 Product Info

1 April 2026 0

Parameters

Number of outputs

2

Output type

LP-HCSL, LVCMOS, LVDS

Output frequency (max) (MHz)

400

Core supply voltage (V)

1.8, 2.5, 3.3

Output supply voltage (V)

1.8, 2.5, 3.3

Operating temperature range (°C)

-40 to 85

Features

Factory One-Time Programmable (OTP) memory, I2C, PCIe Gen 1 - 7 compliant, Pin programmable, Serial interface

Rating

Catalog

Package

TQFN (RER)-16-9 mm² 3 x 3

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
  • 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

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.

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.

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