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LMK3C0105-Q1 Reference-less 5-LVCMOS-Output Programmable BAW Clock

Generator

1 Features

•AEC-Q100 Grade 2 qualified for automotive

applications

•Ambient Temperature: –40°C to 105°C

•Functional Safety-Capable:

–Documentation available to aid functional safety

system design

•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

•Advanced Driver Assistance Systems (ADAS)

•High-Performance Compute

•Head Unit & Digital Cockpit

•Vehicle Instrument Cluster

3 Description

The LMK3C0105-Q1 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 I

2

C interface. An external DC/DC can be

used to power the device. Refer to Power Supply

Recommendationsfor detailed guidelines on power

supply filtering and sourcing from a DC/DC supply.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

LMK3C0105-Q1RGT (VQFN,16)3.0mm × 3.0mm

(1)For more information, see Section 12.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

FOD1

BAW

FOD0

Clock

Dist

Output

Buffer

LMK3C0105

High performance reference-less clock generator

Power

Conditioning

Interface

I2C/OTP

Output

Divider

Output

Buffer

Output

Divider

OUTA

OUTB

OUTC

OUTD

Output

Buffer

REF_CLK

Divider

OUTE

Simplified Block Diagram

LMK3C0105-Q1

SNAS881B – APRIL 2025 – REVISED OCTOBER 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspecifikationer