The LMK3C0105 is a five-channel clock generator primarily used for LVCMOS clock generation, either with or without Spread Spectrum Clocking (SSC). The device has an integrated Bulk Acoustic Wave (BAW) resonator and does not require any external crystal or clock reference. The device has four selectable pages of memory, referred to as OTP pages. The collection of these pages in memory is referred to as the EFUSE.

The default output configuration is four 25MHz in-phase LVCMOS clocks plus one additional 25MHz LVCMOS clock, all enabled at startup. The LMK3C0105 supports programmable output frequencies up to 200MHz. The LMK3C0105V3 is the part number for the default configuration with a 3.3V supply voltage. The LMK3C0105V1 is the part number for the default configuration with a 1.8V supply voltage. Additional configuration part numbers are LMK3C0105Axxx, where xxx denotes the configuration number.

The LMK3C0105 supports two functional modes determined by the REF_CTRL pin at power-up: One-Time Programming (OTP) mode or I²C mode.

1. In OTP mode, one out of four OTP pages is selected by pins OTP_SEL0 and OTP_SEL1. The default output frequency across all OTP pages is 25MHz.
2. In I²C mode, the LMK3C0105 is configured by modifying the active registers. If a configuration other than the default operation is desired, the registers must be written every time at start-up.

Refer to Pin Configuration and Functions for the detailed descriptions of the device pins.

The LMK3C0105 has flexible SSC configurations, including:

1. SSC disabled on all outputs
2. SSC enabled on some outputs
3. SSC enabled on all outputs

Refer to Spread-Spectrum Clocking for SSC and jitter performance details.