1 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

2 Applications

• Crystal replacement (up to 5 single-ended clocks)

• ASIC, FPGA, MCU reference clocking

• Industrial Communications

• Industrial PC

• Human Machine Interface (HMI)

• Wired Networking

3 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.