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LMK3C0105
  • LMK3C0105
  • LMK3C0105

LMK3C0105

ACTIVE

5 output reference-less clock generator with bulk acoustic wave (BAW)

Texas Instruments LMK3C0105 Product Info

1 April 2026 3

Parameters

Number of outputs

5

Output type

LVCMOS

Output frequency (max) (MHz)

200

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, Pin programmable, Serial interface

Rating

Catalog

Package

TQFN (RER)-16-9 mm² 3 x 3

Features

  • Ambient Temperature: –40°C to 85°C
  • Integrated BAW resonator, no need for external reference
  • Flexible frequency generation:
    • 1.8V/2.5V/3.3V LVCMOS outputs supported up to 200MHz
    • Dual Fractional Output Dividers (FODs)
    • Up to three unique output frequencies from 2.5MHz to 200MHz
      • Example: OUTA/B/C/D/E = 25MHz
      • Example: OUTA/B = 100MHz, OUTC/D = 50MHz, OUTE = 25MHz
    • Generation of up to 5 LVCMOS clocks on OUTA through OUTE pins
  • Total output frequency stability: ±25ppm
  • 2 functional modes: I2C or preprogrammed OTP
  • Mixed SSC and non-SSC output support
  • Programmable SSC modulation depth
    • Preprogrammed: –0.1%, –0.25%, –0.3%, and –0.5% down spread
    • Register programmable: –0.1% to –3% down spread or ±0.05% to ±1.5% center spread
  • 1.8V to 3.3V supply voltage
  • Start-up time: <5ms
  • Output skew: <50ps (outputs from the same FOD)
  • Fail-safe input and VDD pins
  • Ambient Temperature: –40°C to 85°C
  • Integrated BAW resonator, no need for external reference
  • Flexible frequency generation:
    • 1.8V/2.5V/3.3V LVCMOS outputs supported up to 200MHz
    • Dual Fractional Output Dividers (FODs)
    • Up to three unique output frequencies from 2.5MHz to 200MHz
      • Example: OUTA/B/C/D/E = 25MHz
      • Example: OUTA/B = 100MHz, OUTC/D = 50MHz, OUTE = 25MHz
    • Generation of up to 5 LVCMOS clocks on OUTA through OUTE pins
  • Total output frequency stability: ±25ppm
  • 2 functional modes: I2C or preprogrammed OTP
  • Mixed SSC and non-SSC output support
  • Programmable SSC modulation depth
    • Preprogrammed: –0.1%, –0.25%, –0.3%, and –0.5% down spread
    • Register programmable: –0.1% to –3% down spread or ±0.05% to ±1.5% center spread
  • 1.8V to 3.3V supply voltage
  • Start-up time: <5ms
  • Output skew: <50ps (outputs from the same FOD)
  • Fail-safe input and VDD pins

Description

The LMK3C0105 is a 5-output reference-less clock generator with SSC support. The device 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 5 SSC clocks, 5 non-SSC clocks, or a mix of SSC and non-SSC clocks at the same time. Up to three different output frequencies can be generated across the five outputs. Each output channel can select either FOD as the frequency source to generate four LVCMOS clocks; the REF_CTRL pin functions as a fifth LVCMOS clock output, and can select either FOD as the source.

The device can be easily configured through either pins or the 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 a DC/DC supply.

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